This circuit provides voltages and a 1 kHz signal for measurement bridges. The circuit is from Electronics Now magazine, September 1995.
This simple timer, which activates an LED indicator, but which can be modified to activate a...
This circuit was obtained in a documentation for radio amateurs in 1974. The coil consists of 12...
This circuit was found in a 1973’s Japanese magazine. It uses transistors of the time and is...