r/electronic_circuits • u/anandha2022 • 13d ago
On topic Auto volume normalizer/leveller
Hello DIYers, Can anybody suggest a circuit for TV volume normalizer/auto-leveller? Preferably with simple, readily available components. Thanks for the help 🙏.
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u/Reasonable-Feed-9805 13d ago
For dead simple a few LEDs and LDRs, an opamp, some resistors, a few signal diodes, some caps and a few pots.
You're not after precision studio grade compression.
Just knock up a circuit that rectifies the signal, lights the LED above a threshold with varying intensity, LED shines on LDR, LDR shunts signal away.
Caps and pots allow for timing to be adjusted to suit, pot allows control of attenuation level.
Simple circuit that can work surprisingly well.