2MHz astable (CB9102E)

This TTL circuit can be used as a shield. The frequency can be changed by changing the capacitors.

Flasher (CB23625E)
This circuit published in the November 1964 Radio Electronics magazine powers a light bulb but can...
Photodiodes Threshold Detector (CB14108E)
This circuit uses an old National Semiconductor operational amplifier, but it can be implemented with...
Comparator With Hysteresis LM324 (CB4004E)
This circuit is from the 1990 Motorola Linear Databook. The circuit can be applied to other...