Found in a 1967 RCA power manual, this circuit uses an ordinary neon lamp to fire a triac. The circuit is for the 110V network.
In the figure we have a configuration that allows to test NPN transistors and with the addition of a...
This circuit can be designed with ease today, as its components are common. We found it in old...
This siren produces an intermitent sound given by the characteristics of the two oscillators using the...