Metal detector (T441E)

Found in a 1946s American documentation, this metal detector uses battery-powered tubes from the era. The circuit has great sensitivity.

Digitally Controlled Astable (CB5424E)
This circuit, which can act as a shield, is from old documentation, using a DAC of the time. Next to...
Fast Recovery Diodes
May 2017 - ROHM is announcing the availability through Mouser Electronics of a broad line of fast...
Inductive Pickup Link For Headset (CB4526E)
This circuit is a handset receiver that picks up the signal emitted by a coil under the rug or...