The circuit is from 1994 National Semiconductor documentation. The component is not easy to obtain, but there are equivalents that can be searched.
Indicated by Popular Electronics to be used with a car headlight, this circuit can also have...
This circuit was obtained from a Popular Electronics. The component is a UJT. The circuit has an...
This circuit is from the 1974 Motorola Unijunction Trigger Circuits for Gated Thyristor. The triac...