This 1965 circuit consists of a small inverter for an ultraviolet lamp. The circuit is from a Motorola manual and the transformer must be wound on the core indicated in the diagram.
This balance indicator for stereo amplifiers was found in an 80's Elektor. The components used are...
In the figure we have the way to control a TIC series triac with a reed switch. The current in the...
This source provides a 1.5V voltage used in the power supply of model aircraft spark plugs. The...