This circuit was found in a 1969 Mullard documentation. Used transistors can be replaced with modern equivalents. Output transistors may be BD135 and 136 with heatsinks.
Found in documentation from the 1980s, this circuit can be used with other operational ones. The...
This circuit warns you if you forget to turn off the car light and leave it. The circuit is from a...
We find this efficient emergency lighting system in a 1987 publication. The circuit keeps a...