Sound triggered flash (CB8703E)

Found in 90s Popular Electronics, this circuit fires an old camera flash of the type with a xenon lamp from the sound captured by a microphone.

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Second order polynomial generator (CB7902E)
Found in an Electronic Design from the 90s, this circuit generates a mathematical function given by the...
10 kHz oscillator (CB20349E)
This oscillator generates a fixed frequency signal determined by C1 and C2. In the case of 1 nF,...
Distribution Amplifier (CB19012E)
This amplifier for distributing audio signals appears in other articles on this website and even...