300V x 200mA Regulator (CB23720E)

This high-voltage solid-state voltage regulator was featured in the January 1961 Radio Electronics magazine. The components are contemporary.

Emergency Lighting (CB17043E)
This circuit from a 1995 documentation triggers a set of lamps when the power goes out. In a more...
Remote Control Receiver (CB502)
With a coil formed by 7 turns of 26 AWG wire this circuit operates in the 27 MHz range. But you...
Simple Multimeter (CB16271E)
The assembly of a good multimeter meets only one obstacle: the precision that is obtained depends on...