Integration of the On-Air Button #2

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opened 2020-12-14 10:29:19 +00:00 by jannik · 1 comment

jannik commented

2020-12-14 10:29:19 +00:00

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The On-Air Button is a latching single pole, double throw switch with two LEDs (green, yellow) with common anode.

It should behave as:

green LED on when microphone is active (switch open)
no LED or yellow LED on when microphone is muted (switch closed)

The switch has to short the feedback path of the op-amp to mute the microphone (same as the mute button (N.O.)) without interfering with the voltage on the feedback line.

The only solution, that came to my mind is to use a relay with two independent double-action poles.
One pole is closing the feedback patch and the other one is controlling the LED(s).

The On-Air Button is a latching single pole, double throw switch with two LEDs (green, yellow) with common anode. It should behave as: - green LED on when microphone is active (switch open) - no LED or yellow LED on when microphone is muted (switch closed) The switch has to short the feedback path of the op-amp to mute the microphone (same as the mute button (N.O.)) without interfering with the voltage on the feedback line. The only solution, that came to my mind is to use a relay with two independent double-action poles. One pole is closing the feedback patch and the other one is controlling the LED(s).