Two-channel peak indicator (CB21975E)

This peak indicator for stereo amplifiers uses a CA3130. The 80's circuit does not need a symmetrical power supply.

Car Thermometer (CB24759E)
The circuit we show is part of an article that taught its complete assembly. The article is from...
Headlight and lantern control (CB7249E)
Found in American documentation from the 90s, this circuit has a timing system for activating the...
Wien Bridge Sine Oscillator (CB8423E)
This circuit was obtained in a 90s Popular Electronics. It generates a 10 Hz sinusoidal signal...