This type of configuration can be seen elsewhere in this section. This is from a 1965 General Electric Hobby Manual. The circuit applies to most modern triacs.
This circuit with an industrial standard 4-20 mA interface uses a KPZ20G pressure sensor but can...
This simple receiver with germanium transistor and listening on a crystal phone was discovered in a...
This circuit is from Motorola technical documentation from the 70s, but it can be easily assembled...