This circuit was obtained in an American publication of 1970, making use of components of the time. Components may be replaced by equivalents.
This circuit fires at the touch of a sensor, passing its output from high to low in a time given by...
This 9 V amplifier has a gain of 20 and provides a power of a few hundred milliwatts. The circuit is...
This circuit in its original version was found in an 1975 English publication. It is a...