Charger protection relay (CB26312E)

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

Low Voltage Peak Detector MC34071 (CB15291E)
Other operational amplifiers series, such as the MC34072, MC34074, MC35071, MC35072, MC35074 or...
Programmed Gain Amplifier (CB24621E)
This circuit with the HA2400 was found in the March 1980 Radio Electronics magazine. The circuit has...
Mixer Preamplifier Using FET (CB244E)
This circuit has two high-impedance inputs. The gain is high and more inputs can be added. Use a...