Charger protection relay (CB26312E)

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

Differential Amplifier and 15 MHz Low Pass Filter (CB12514E)
The circuit we present is suggested by Linear Technologies (www.linear.com) and makes use of an...
AC0x Series Protection CS Resistors
May 2017 - Vishay's new AC0x..CS series safety wirewound resistors can now be obtained from Mouser...
a Infrared Generator (CB4892E)
This circuit generates signals from 93 to 170 Hz in three ranges. The circuit is from an American...