Employing a unijunction and a triac of the era, this 1964 Electronic Design circuit uses a diac to trigger the Triac.
This circuit of a few tens of milliwatts of power requires a single source. We found it in a Radio...
Found in Popular Electronics this circuit will trigger a buzzer if the ignition key is removed...
May 2017 - The new 36V TLVx171 Series of General Purpose Operational Amplifiers from Texas...