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 temperature compensated circuit was found in a Popular Electronics of the 1990s. The circuit...
This circuit generates sequence of pulses in order and times determined by the capacitors in pins...
This 1970s RCA circuit can be triggered by light or dark, depending on how the LDR is connected....