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.
When the input of this circuit goes to high level, the LEDs start to flash alternately. The...
This 50 kHz oscillator makes use of a CTUJ, complementary unijunction transistor. The circuit is...
This circuit has more sensitivity than the previous one (CB4114E) for using a full-wave detector...