Found in an American 1980s documentation, this circuit compares signals from two TTL sources, providing an output that depends on the frequency difference. The circuit can be used as a shield.
The circuit shown consists of a bilateral constant current source with an operational one that...
This circuit for discharging NiCad batteries limits the current to a value that can be adjusted in the...
This AC voltmeter, with 10 V full scale, has a sensitivity of 20 k ohms per volt. The supply must...