[FIX] Schematics: Revised values and PCB errata text
* fixed trim pot range at VU meter * TODOs removed (5V V_LED didn't work out, 10uF at LM386 wasn't better, VU meter filtering not needed) * phantom power voltage changed and readme chapter added * hardware errata: gain pot. pins are swapped, ground plane isn't fully connected Footprints and PCB aren't fixed to keep the schematic compatible with the existing PCBs!
This commit is contained in:
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README.md
18
README.md
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@ -80,8 +80,6 @@ For the microphone preamp, we are using the NE5534 low-noise opamp with a circui
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In a normal mixer, you would be able to lower the microphone's volume to zero.
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In a normal mixer, you would be able to lower the microphone's volume to zero.
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But in our case we just need on/ off and some gain range to adjust for different microphones and loudness of different people.
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But in our case we just need on/ off and some gain range to adjust for different microphones and loudness of different people.
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TODO: Integrate the On-Air button with it's LEDs
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### Line Input/ Input Module
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### Line Input/ Input Module
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The line input must not be amplified at all, because loudness control of the headphones is done by the headphone amplifier section.
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The line input must not be amplified at all, because loudness control of the headphones is done by the headphone amplifier section.
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@ -121,6 +119,11 @@ When searching for VU meter circuits, many use the LM3916 LED bar graph driver,
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But this chip is obsolete and not produced any more, so we designed our own chain of comparators to drive a set of LEDs.
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But this chip is obsolete and not produced any more, so we designed our own chain of comparators to drive a set of LEDs.
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### Phantom Power
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The cheap but still decent Superlux HMC-660 headset is known to sound quite bad with standard 48 V phantom power (which can be easily fixed by adding some resistors inside the XLR connector).
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But when I bought one in April 2021, it worked just fine with 48 V and didn't really work with 12 or 15 V.
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So, if phantom power should be a feature of the interpreter unit, it probably best to have standard 48 V instead of any special treatment for one special headset.
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## User Interface
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## User Interface
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The user interface should enable the interpreters to adjust their microphone gain and headphone mix on their own.
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The user interface should enable the interpreters to adjust their microphone gain and headphone mix on their own.
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@ -269,24 +272,23 @@ Electrolytic capacitors should have 25 V voltage rating, unless otherwise specif
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| Count | Manufacturer + Art. No. | Description | €/ pc.| Distributor Order No.
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| Count | Manufacturer + Art. No. | Description | €/ pc.| Distributor Order No.
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|-------|---------------------------|-----------------------------------|-------|----------------------
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|-------|---------------------------|-----------------------------------|-------|----------------------
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| 1 | Neutrik NCJ6FA-H | Stage Line Input | 1.10 | Thomann 250931
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| 1 | Neutrik NCJ6FA-H | Stage Line Input | 1.10 | Thomann 250931
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| 1 | Neutrik NC3MAAH | Mix Line Output | 0.78 | Voelkner X39973
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| 1 | Neutrik NC3MAAH | Mix Line Output | 0.78 | Voelkner X39973, Mouser 568-NC3MAAH
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| 1 | PTSM 0,5/ 2-2,5-V THR | PCB Output | 0.50 | Mouser 651-1770953, DigiKey 277-2086-1-ND
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| 1 | PTSM 0,5/ 2-2,5-V THR | PCB Output | 0.50 | Mouser 651-1770953, DigiKey 277-2086-1-ND
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| 1 | PTSM 0,5/ 3-2,5-H THR | PCB PowerSupply | 0.70 | Mouser 651-1770898, DigiKey 277-2080-1-ND
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| 1 | PTSM 0,5/ 3-2,5-H THR | PCB PowerSupply | 0.70 | Mouser 651-1770898, DigiKey 277-2080-1-ND
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| 1 | PTSM 0,5/ 4-2,5-V THR | PCB Inputs | 0.80 | Mouser 651-1770979, DigiKey 277-2088-1-ND
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| 1 | PTSM 0,5/ 4-2,5-V THR | PCB Inputs | 0.80 | Mouser 651-1770979, DigiKey 277-2088-1-ND
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| 1 | Vishay M64Y104 | 100K trim pot: Line input adj. | 0.83 | Reichelt VIS M64Y104KB40
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| 1 | Vishay M64Y104 | 100K trim pot: Line input adj. | 0.83 | Reichelt VIS M64Y104KB40
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| 2 | LM833N | Generic Op-Amp | 0.75 | Mouser 926-LM833N/NOPB, DigiKey 296-44419-5-ND
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| 2 | LM833N | Generic Op-Amp | 0.75 | DigiKey 296-44419-5-ND, Mouser 926-LM833N/NOPB
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| 1 | DRV134PA | Line Driver | 4.75 | Mouser 595-DRV134PA, DigiKey DRV134PA-ND
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| 1 | DRV134PA | Line Driver | 4.75 | Mouser 595-DRV134PA, DigiKey DRV134PA-ND
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| 3 | DIP-8 Socket | for LM833N, DRV134PA | 0.03 | Reichelt GS 8
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| 3 | DIP-8 Socket | for LM833N, DRV134PA | 0.03 | Reichelt GS 8
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| 1 | Cer. Cap. 22pF | C_Disc_D5.0mm_W2.5mm_P5.00mm | 0.33 | DigiKey 399-9723-ND, Mouser TODO
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| 1 | Cer. Cap. 22pF | C_Disc_D5.0mm_W2.5mm_P5.00mm | 0.33 | DigiKey 399-9723-ND, Mouser TODO
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| 1 | Cer. Cap. 47pF | C_Disc_D5.0mm_W2.5mm_P5.00mm | 0.33 | DigiKey 399-C315C470K5G5TA-ND, Mouser TODO
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| 1 | Cer. Cap. 47pF | C_Disc_D5.0mm_W2.5mm_P5.00mm | 0.33 | DigiKey 399-C315C470K5G5TA-ND, Mouser TODO
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| 1 | Cer. Cap. 220pF | C_Disc_D5.0mm_W2.5mm_P5.00mm | 0.31 | DigiKey 399-9802-ND, Mouser TODO
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| 1 | Cer. Cap. 220pF | C_Disc_D5.0mm_W2.5mm_P5.00mm | 0.31 | DigiKey 399-9802-ND, Mouser TODO
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| 4 | Cer. Cap. 100nF | C_Disc_D5.0mm_W2.5mm_P5.00mm | 0.20 | DigiKey 399-4329-ND, Mouser TODO
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| 6 | Cer. Cap. 100nF | C_Disc_D5.0mm_W2.5mm_P5.00mm | 0.20 | DigiKey 399-4329-ND, Mouser TODO
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| 2 | Cer. Cap. 1uF | C_Disc_D5.0mm_W2.5mm_P5.00mm | | (TODO: just use 100 nF or an el. cap.)
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| 6 | 10K | Metal film resistor | 0.02 | Average price at 100 pcs
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| 6 | 10K | Metal film resistor | 0.02 | Average price at 100 pcs
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| 5 | 22K | Metal film resistor | 0.02 | Average price at 100 pcs
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| 5 | 22K | Metal film resistor | 0.02 | Average price at 100 pcs
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| 1 | 3.3K | Metal film resistor | 0.02 | Average price at 100 pcs
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| 1 | 3.3K | Metal film resistor | 0.02 | Average price at 100 pcs
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| 1 | 47K | Metal film resistor | 0.02 | Average price at 100 pcs
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| 1 | 47K | Metal film resistor | 0.02 | Average price at 100 pcs
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| | | **SUM** | 13.48 | (1uF calculated as 100nF)
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| | | **SUM** | 13.48 |
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#### Channel Strip Components
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#### Channel Strip Components
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@ -336,7 +338,7 @@ Electrolytic capacitors should have 25 V voltage rating, unless otherwise specif
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| 1 | 56R | Metal film resistor | 0.02 | Average price at 100 pcs
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| 1 | 56R | Metal film resistor | 0.02 | Average price at 100 pcs
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| 1 | 27K 1% | Metal film resistor | 0.02 | Average price at 100 pcs
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| 1 | 27K 1% | Metal film resistor | 0.02 | Average price at 100 pcs
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| 1 | 330R | Metal film resistor | 0.02 | Average price at 100 pcs
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| 1 | 330R | Metal film resistor | 0.02 | Average price at 100 pcs
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| 2 | 680R 1% | Metal film resistor | 0.02 | Average price at 100 pcs
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| 2 | 6.8K 1% | Metal film resistor | 0.02 | Average price at 100 pcs
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| 1 | 820R | Metal film resistor | 0.02 | Average price at 100 pcs
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| 1 | 820R | Metal film resistor | 0.02 | Average price at 100 pcs
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| 1 | 330K | Metal film resistor | 0.02 | Average price at 100 pcs
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| 1 | 330K | Metal film resistor | 0.02 | Average price at 100 pcs
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| 2 | 1K 1% | Metal film resistor | 0.02 | Average price at 100 pcs
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| 2 | 1K 1% | Metal film resistor | 0.02 | Average price at 100 pcs
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Binary file not shown.
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@ -1,4 +1,4 @@
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update=Saturday, 29 May 2021 at 00:01:50
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update=Thursday, 02 September 2021 at 20:45:35
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last_client=kicad
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last_client=kicad
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[general]
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[general]
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version=1
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version=1
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@ -5,10 +5,10 @@ $Descr A4 11693 8268
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encoding utf-8
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encoding utf-8
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Sheet 1 5
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Sheet 1 5
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Title "c3lingo interpeter unit"
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Title "c3lingo interpeter unit"
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Date "2021-05-28"
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Date "2021-09-02"
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Rev "v0.2"
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Rev "v0.2.1"
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Comp "Jannik Beyerstedt (jtbx)"
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Comp "Jannik Beyerstedt (jtbx)"
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Comment1 "Prototype 1"
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Comment1 "Prototype 1 (with errata)"
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Comment2 ""
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Comment2 ""
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Comment3 ""
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Comment3 ""
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Comment4 ""
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Comment4 ""
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@ -5,10 +5,10 @@ $Descr A3 16535 11693
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encoding utf-8
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encoding utf-8
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Sheet 3 5
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Sheet 3 5
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Title "c3lingo interpeter unit -- channel strip"
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Title "c3lingo interpeter unit -- channel strip"
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Date "2021-05-28"
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Date "2021-09-02"
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Rev "v0.2"
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Rev "v0.2.1"
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Comp "Jannik Beyerstedt (jtbx)"
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Comp "Jannik Beyerstedt (jtbx)"
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Comment1 "Prototype 1"
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Comment1 "Prototype 1 (with errata)"
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Comment2 ""
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Comment2 ""
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Comment3 ""
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Comment3 ""
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Comment4 ""
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Comment4 ""
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@ -100,8 +100,8 @@ F 4 "+DIP-14 Socket" H 7100 8400 50 0001 C CNN "Model"
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5 7100 8400
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5 7100 8400
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0 -1 -1 0
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0 -1 -1 0
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$EndComp
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$EndComp
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Text Notes 1850 7900 0 50 ~ 0
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Text Notes 1850 8000 0 50 ~ 0
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Buffer/ Rectifier\nGain: 3.9
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Buffer/ Rectifier\nGain: 15\n(3.9 + 12 dB for\ntrim pot. headroom)
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$Comp
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$Comp
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L Comparator:LM339 U306
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L Comparator:LM339 U306
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U 5 1 60B42907
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U 5 1 60B42907
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@ -195,7 +195,7 @@ AR Path="/60AE7597/60B42949" Ref="R420" Part="1"
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AR Path="/60AE80F3/60B42949" Ref="R520" Part="1"
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AR Path="/60AE80F3/60B42949" Ref="R520" Part="1"
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AR Path="/60B42949" Ref="R120" Part="1"
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AR Path="/60B42949" Ref="R120" Part="1"
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F 0 "R320" V 2843 6500 50 0000 C CNN
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F 0 "R320" V 2843 6500 50 0000 C CNN
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F 1 "3.9K" V 2934 6500 50 0000 C CNN
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F 1 "15K" V 2934 6500 50 0000 C CNN
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F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 2980 6500 50 0001 C CNN
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F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 2980 6500 50 0001 C CNN
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F 3 "~" H 3050 6500 50 0001 C CNN
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F 3 "~" H 3050 6500 50 0001 C CNN
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1 3050 6500
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1 3050 6500
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@ -732,7 +732,7 @@ Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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9900 10800 9900 10500
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9900 10800 9900 10500
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Text Notes 4250 8450 0 50 ~ 0
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Text Notes 4250 8450 0 50 ~ 0
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Signal Smoothing\nTODO: Remove all together!?
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Signal Smoothing\n==> DNP (not required)
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$Comp
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$Comp
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L Device:R R347
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L Device:R R347
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U 1 1 60B4292A
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U 1 1 60B4292A
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@ -1345,8 +1345,6 @@ F 3 "" H 5550 7800 50 0001 C CNN
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1 5550 7800
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1 5550 7800
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1 0 0 -1
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1 0 0 -1
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$EndComp
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$EndComp
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Text Notes 13550 6700 0 50 ~ 0
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TODO: Try with V_LED = 5V\nrd: 2.3 V (390R @15V)\ngn: 2.4 V (390R @15V)\nye: 2.6 V (390R @15V)
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$Comp
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$Comp
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L power:+15V #PWR0329
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L power:+15V #PWR0329
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U 1 1 60B429E4
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U 1 1 60B429E4
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@ -2160,7 +2158,7 @@ F 4 "low ESR electrolytic // plastic film" H 1750 3500 50 0001 C CNN "Model"
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0 -1 -1 0
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0 -1 -1 0
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$EndComp
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$EndComp
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Text Notes 1300 4000 0 50 ~ 10
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Text Notes 1300 4000 0 50 ~ 10
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Phantom Power\n(15V)
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Phantom Power\n(48V)
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Wire Wire Line
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Wire Wire Line
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1300 3500 1500 3500
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1300 3500 1500 3500
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Wire Wire Line
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Wire Wire Line
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@ -2240,7 +2238,7 @@ AR Path="/60AE7597/5FDA0F68" Ref="R411" Part="1"
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AR Path="/60AE80F3/5FDA0F68" Ref="R511" Part="1"
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AR Path="/60AE80F3/5FDA0F68" Ref="R511" Part="1"
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AR Path="/5FDA0F68" Ref="R111" Part="1"
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AR Path="/5FDA0F68" Ref="R111" Part="1"
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F 0 "R311" H 1570 3296 50 0000 L CNN
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F 0 "R311" H 1570 3296 50 0000 L CNN
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F 1 "680R 1%" H 1570 3205 50 0000 L CNN
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F 1 "6.8K 1%" H 1570 3205 50 0000 L CNN
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F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 1430 3250 50 0001 C CNN
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F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 1430 3250 50 0001 C CNN
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F 3 "~" H 1500 3250 50 0001 C CNN
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F 3 "~" H 1500 3250 50 0001 C CNN
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1 1500 3250
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1 1500 3250
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@ -2255,7 +2253,7 @@ AR Path="/60AE7597/5FD87CA8" Ref="R407" Part="1"
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AR Path="/60AE80F3/5FD87CA8" Ref="R507" Part="1"
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AR Path="/60AE80F3/5FD87CA8" Ref="R507" Part="1"
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AR Path="/5FD87CA8" Ref="R107" Part="1"
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AR Path="/5FD87CA8" Ref="R107" Part="1"
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F 0 "R307" H 1430 2704 50 0000 R CNN
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F 0 "R307" H 1430 2704 50 0000 R CNN
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F 1 "680R 1%" H 1430 2795 50 0000 R CNN
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F 1 "6.8K 1%" H 1430 2795 50 0000 R CNN
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F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 1430 2750 50 0001 C CNN
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F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 1430 2750 50 0001 C CNN
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F 3 "~" H 1500 2750 50 0001 C CNN
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F 3 "~" H 1500 2750 50 0001 C CNN
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1 1500 2750
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1 1500 2750
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@ -2649,8 +2647,6 @@ F 3 "~" H 12850 4050 50 0001 C CNN
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1 12850 4050
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1 12850 4050
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-1 0 0 -1
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-1 0 0 -1
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$EndComp
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$EndComp
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Text Notes 14400 2500 0 50 ~ 0
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TODO: Change to 10 uF?
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Wire Wire Line
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Wire Wire Line
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13500 2900 13500 3650
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13500 2900 13500 3650
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Wire Wire Line
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Wire Wire Line
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1 3400 10750
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1 3400 10750
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1 0 0 -1
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1 0 0 -1
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$EndComp
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$EndComp
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Text Notes 11800 9900 0 58 ~ 12
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PCB Errata:\n- R302 (R102 on PCB) has pins 1 and 3 swapped. Connect R305 (R105) directly to the left\n potentiometer pin!\n- The ground plane at the headphone mix potentiometers is not connected to the remaining\n ground plane/ power input. Place a jumper manually!
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Text Notes 4650 3750 0 50 ~ 0
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DNP R312 and\nreplace C309 with\na jumper!
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Text Notes 8000 10200 0 50 ~ 0
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Bridge V_LED to +15V\n(5V V_LED didn’t work)
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$EndSCHEMATC
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$EndSCHEMATC
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@ -5,10 +5,10 @@ $Descr A4 11693 8268
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encoding utf-8
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encoding utf-8
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Sheet 2 5
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Sheet 2 5
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Title "c3lingo interpeter unit -- mix and line I/O"
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Title "c3lingo interpeter unit -- mix and line I/O"
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Date "2021-05-28"
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Date "2021-09-02"
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Rev "v0.2"
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Rev "v0.2.1"
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Comp "Jannik Beyerstedt (jtbx)"
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Comp "Jannik Beyerstedt (jtbx)"
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Comment1 "Prototype 1"
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Comment1 "Prototype 1 (with errata)"
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Comment2 ""
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Comment2 ""
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Comment3 ""
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Comment3 ""
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Comment4 ""
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Comment4 ""
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@ -515,7 +515,7 @@ L Device:C C206
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U 1 1 604659B0
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U 1 1 604659B0
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P 5950 4050
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P 5950 4050
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F 0 "C206" V 5698 4050 50 0000 C CNN
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F 0 "C206" V 5698 4050 50 0000 C CNN
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F 1 "1uF" V 5789 4050 50 0000 C CNN
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F 1 "100nF" V 5789 4050 50 0000 C CNN
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F 2 "Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm" H 5988 3900 50 0001 C CNN
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F 2 "Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm" H 5988 3900 50 0001 C CNN
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F 3 "~" H 5950 4050 50 0001 C CNN
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F 3 "~" H 5950 4050 50 0001 C CNN
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1 5950 4050
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1 5950 4050
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@ -526,7 +526,7 @@ L Device:C C209
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U 1 1 60444365
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U 1 1 60444365
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P 5950 4950
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P 5950 4950
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F 0 "C209" V 5698 4950 50 0000 C CNN
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F 0 "C209" V 5698 4950 50 0000 C CNN
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F 1 "1uF" V 5789 4950 50 0000 C CNN
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F 1 "100nF" V 5789 4950 50 0000 C CNN
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F 2 "Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm" H 5988 4800 50 0001 C CNN
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F 2 "Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm" H 5988 4800 50 0001 C CNN
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F 3 "~" H 5950 4950 50 0001 C CNN
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F 3 "~" H 5950 4950 50 0001 C CNN
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1 5950 4950
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1 5950 4950
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@ -0,0 +1,41 @@
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(module Potentiometer_Alps_RK09K_Single_Vertical-patched (layer F.Cu) (tedit 6131142B)
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(descr "Potentiometer, vertical, Alps RK09K Single, http://www.alps.com/prod/info/E/HTML/Potentiometer/RotaryPotentiometers/RK09K/RK09K_list.html")
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(tags "Potentiometer vertical Alps RK09K Single")
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(fp_text reference REF** (at 6.05 -10.15) (layer F.SilkS)
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(effects (font (size 1 1) (thickness 0.15)))
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)
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(fp_text value Potentiometer_Alps_RK09K_Single_Vertical-patched (at 6.05 5.15) (layer F.Fab)
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(effects (font (size 1 1) (thickness 0.15)))
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)
|
||||||
|
(fp_line (start 13.25 -9.15) (end -1.15 -9.15) (layer F.CrtYd) (width 0.05))
|
||||||
|
(fp_line (start 13.25 4.15) (end 13.25 -9.15) (layer F.CrtYd) (width 0.05))
|
||||||
|
(fp_line (start -1.15 4.15) (end 13.25 4.15) (layer F.CrtYd) (width 0.05))
|
||||||
|
(fp_line (start -1.15 -9.15) (end -1.15 4.15) (layer F.CrtYd) (width 0.05))
|
||||||
|
(fp_line (start 13.12 -7.521) (end 13.12 2.52) (layer F.SilkS) (width 0.12))
|
||||||
|
(fp_line (start 0.88 0.87) (end 0.88 2.52) (layer F.SilkS) (width 0.12))
|
||||||
|
(fp_line (start 0.88 -1.629) (end 0.88 -0.87) (layer F.SilkS) (width 0.12))
|
||||||
|
(fp_line (start 0.88 -4.129) (end 0.88 -3.37) (layer F.SilkS) (width 0.12))
|
||||||
|
(fp_line (start 0.88 -7.521) (end 0.88 -5.871) (layer F.SilkS) (width 0.12))
|
||||||
|
(fp_line (start 9.184 2.52) (end 13.12 2.52) (layer F.SilkS) (width 0.12))
|
||||||
|
(fp_line (start 0.88 2.52) (end 4.817 2.52) (layer F.SilkS) (width 0.12))
|
||||||
|
(fp_line (start 9.184 -7.521) (end 13.12 -7.521) (layer F.SilkS) (width 0.12))
|
||||||
|
(fp_line (start 0.88 -7.521) (end 4.817 -7.521) (layer F.SilkS) (width 0.12))
|
||||||
|
(fp_line (start 13 -7.4) (end 1 -7.4) (layer F.Fab) (width 0.1))
|
||||||
|
(fp_line (start 13 2.4) (end 13 -7.4) (layer F.Fab) (width 0.1))
|
||||||
|
(fp_line (start 1 2.4) (end 13 2.4) (layer F.Fab) (width 0.1))
|
||||||
|
(fp_line (start 1 -7.4) (end 1 2.4) (layer F.Fab) (width 0.1))
|
||||||
|
(fp_circle (center 7.5 -2.5) (end 10.5 -2.5) (layer F.Fab) (width 0.1))
|
||||||
|
(fp_text user %R (at 2 -2.5 90) (layer F.Fab)
|
||||||
|
(effects (font (size 1 1) (thickness 0.15)))
|
||||||
|
)
|
||||||
|
(pad 1 thru_hole circle (at 0 -5) (size 1.8 1.8) (drill 1) (layers *.Cu *.Mask))
|
||||||
|
(pad 2 thru_hole circle (at 0 -2.5) (size 1.8 1.8) (drill 1) (layers *.Cu *.Mask))
|
||||||
|
(pad 3 thru_hole circle (at 0 0) (size 1.8 1.8) (drill 1) (layers *.Cu *.Mask))
|
||||||
|
(pad "" np_thru_hole circle (at 7 -6.9) (size 4 4) (drill 2) (layers *.Cu *.Mask))
|
||||||
|
(pad "" np_thru_hole circle (at 7 1.9) (size 4 4) (drill 2) (layers *.Cu *.Mask))
|
||||||
|
(model ${KISYS3DMOD}/Potentiometer_THT.3dshapes/Potentiometer_Alps_RK09K_Single_Vertical.wrl
|
||||||
|
(at (xyz 0 0 0))
|
||||||
|
(scale (xyz 1 1 1))
|
||||||
|
(rotate (xyz 0 0 0))
|
||||||
|
)
|
||||||
|
)
|
Reference in a new issue