Found in a Radio Electronics store from the 90s, this circuit is for cars of that era. The circuit uses a 2N3055 that must be equipped with a heat sink.
This circuit is from a Popular Electronics of the 90's. Any power MOSFET can be used. The circuit...
The critical component of this circuit is the transformer. T1 and T2 can be BD135 and T3 / T4 can...
This circuit generates 500 Hz rectangular signals. The circuit is from old American documentation. Neon...