LM3900 Rectangular Oscillator (CB25179E)

This 1 kHz oscillator uses a Norton LM3900 operating system. The frequency depends on C1 and R1 and can be changed.

Infrared Remote Control Receiver (CB18697E)
This is the basic receiver for the CIR12025 that consists of the transmitter. The circuit is...
Photodiode light sensor (CB8271E)
This circuit of a 1964 Electronic Design uses a photodiode from the time. Modern equivalent can be used....
Incandescent Light Effect (CB11374E)
With the circuit shown, when the brightness of one lamp decreases, that of the other increases. There is...