This old fashioned transistor amplifier was found in a publication of the year 1958. Transformer are the critical components in the circuit and power comes from 6 D cells.
Although this project has only 3 digits, nothing prevents it from being modified to operate with a...
This circuit is very critical in the adjustment. The coil should have at least 1000 turns of fine...
This two-input limit detector was found in an American 1980s documentation. The circuit can be...