Relays up to 100 mA can be driven by the 555 with the recommended circuit. The circuit is from an article in the September 1992 Radio Electronics magazine.
This circuit was obtained in the SGS manual of linear integrated circuits of 1982. The maximum...
Found in a Hands-On Electornics, this touch biestable can control loads that depend on the SCR....
The purpose of this circuit is to keep the speed of a small 100 mA direct current motor constant. The...