Audible TTL Probe (CB5907E)

This circuit was found in a 1980s documentation. The IC is the 7400 and should be powered with 5 V. The transducer is a ceramic or crystal capsule.

Capacitive Alarm (CB5059E)
We found this circuit in an American 1980s documentation. The circuit can be easily assembled in our...
Timer with FET (CB1522E )
This circuit is from an American documentation of 1975. The FET may be the BF245 and the relay is of...
Microchip Launches Two New SAM Microcontroller Families with Extensive Connectivity Interface Options
SAM D5x and E5x MCUs Provide Powerful Performance and Enhanced Security Features CHANDLER, Ariz.,...