This circuit was found in a Motorola Manual of 1965. The circuit has neon lamps as trigger elements. Equivalent SCRs can be used.
This circuit for 6 lamps was found in old American documentation. The supply is of high voltage...
The integrated circuit used in this regulator is not very common today. The circuit is from old...
This circuit uses a triac to detect the level of a reservoir, and a sensitive SCR connected to the...