This sophisticated circuit was found in the November 1978 issue of Radio Electronics magazine. Based on CMOS logic, it has several types of timing, controlling the wiper relay.
This is a typical amplifier stage with 1 old general purpose silicon transistor. The circuit is...
We found this circuit in a 1986 documentation. It uses only LEDs, batteries, resistors and the...
This circuit does not establish, immediately after connection, the voltage of 15 V in the load. The...