The integrated circuit used is uncommon today. The circuit was obtained in the Philips integrated circuits manual of 1990. The reference voltage-range is from 0.5 to 9.0 V.
This light-controlled circuit uses a 6 V or 12 V relay depending on the supply. The transistor can be the...
This circuit was found in an American publication from 1965. The circuit uses components from that...
This powerful inverter provides a high-quality sine wave signal. I found it in a Radio Electronics issue...