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.
Indicated for digital temperature measurement, this converter circuit was found in an Electronic...
This circuit is from the 1982 SGS Linear Circuits Manual. The circuit provides currents from 35 mA...
This circuit that can be activated by light or heat was found in an old American documentation, but the...