Using only discrete components, this circuit can control loads up to 8 kW. SCRs should be appropriate and equipped with large heat sinks.
It serves as a reference, since today we can have simpler and more compact solutions. This circuit is...
This circuit is from an old manual from National Semiconductor (Now Texas), using the LM2877 not...
This circuit is from the Motorola Linear Databook published in 1990. The circuit for 1 kHz can be...