This blinker for LEDs up to 500 mA was found in General Electric documentation from 1970. Transistors can be replaced with current equivalent types.
This circuit was found in an American 1980s documentation. It makes use of an unusual MOSFET today...
We find this circuit in American documentation from the 1980s. The accuracy of the circuit depends on the...
This circuit is from 1964 documentation but can be easily implemented based on current components....