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 is a circuit of an 80's American documentation and can be implemented with modern components....
This switching source was obtained in a 1976 National Semiconductor manual. For the indicated...
Wired to the output of any amplifier this circuit makes an incandescent lamp flash according the...