This circuit for old flashes with xenon lamps was found in a Radio Electronics magazine from June 1966. The sensor is a photoelectric cell from the time. Power is supplied by a 9 V battery.
This digital clock has a traditional configuration with well-known CMOS integrated circuits. The...
This experimental radio was obtained in an old Argentine publication. Germanium transistors are...
This circuit was found in an EDN from the 90s. The circuit employs a double 555 and uses the...