We found this circuit in a 1985 technical publication. The circuit uses PUTs to drive lamps. Relays or LEDs can be used with the voltage according to the supply.
We find this circuit in a technical documentation of 1976. The transistors can be the BD135 and...
This circuit was found in the February 1990 issue of Radio Electronics magazine. The circuit uses...
The XR220 is a circuit equivalent to the 555 of the 1970s. This configuration from Radio...