This circuit was found in a 1968 documentation. It makes use of both NO and NC reed-switches and small magnets attached to a card in the form that results in the drive combination.
In the circuit shown in the figure we have the way to excite a small speaker from a TTL output. The...
This fuzz uses only one transistor that can be the BC548. Signal input and output cables must be...
This circuit is from a 1977 documentation. It is powered by the power supply of the circuit under...