This circuit was found in a 1975 documentation. The SCR can be of any type and in this case, we have the horn activation. The relay must be a 12 V type with high contact current.
This operational amplifier configuration has gain controlled by an external voltage applied to a...
This circuit is from a 1978 publication, being connected to the contact breaker of cars that still...
January 2017 - STMicroelectronics' new TN4015H SCRs with 40 A currents and high temperature...