Charger protection relay (CB26312E)

This circuit was obtained from an Elektor magazine from the 90s. The circuit is to protect batteries while charging.

150 Hz to 1.5 kHz Wien Bridge Oscillator (CB25907E)
This circuit was found in the December 1995 issue of Electronics Now magazine. The circuit...
Photocell Motor Control (CB14945E)
In the figure we have the photo-conductive way of using a photocell to control a small motor with...
Synchronized Adjustable Sinusoidal Oscillator (CB18248E)
This circuit, which can be used on percussion instruments, has the oscillation point adjustment made in...