Lamp Timer (CB21291E)

This circuit was found in a Popular Electronics from the 90s. The circuit uses TTL technology and must be powered by a voltage of 5V.

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240 kHz amplifier using the LF356 (CB3994E)
The circuit presented with low drift is from the Motrorola LinearDatabook of 1990. The circuit...
Triggered Sawtooth Generators LM3900 (CB15630E)
The previous circuit (CB15629E) can be changed to generate a sawtooth signal synchronized...
Dual adjustable symmetrical power supply (CB25957E)
This dual adjustable power supply was found in the June 1990 issue of Radio Electronics magazine....