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 provides two outputs of the same signal. One with the original phase and the other...
S1 changes the selection of the input signals in the circuit shown here. Other type of circuits,...
We found this relaxation circuit with diac in an opto-electronic documentation with diac....