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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Constant current pulse generator (CB7879E)
Found in a 1965 Electronic Design, this circuit generates adjustable pulses between 200 uA and 10...
L200 High Voltage Input and Output Regulator (CB15145E)
We found this circuit in the 1982 SGS Linear Integrated Circuits manual. The transistor supports...
Electronics Bench (CB17446E)
This circuit can equip the electronics practitioner's bench with an excellent number of resources. In...