This circuit was found in a Philips documentation from 19678. The transistors are from the period with emphasis on the married pair. Modern equivalents can be used.
This circuit was found in an old documentation and can be powered by a solar panel. The touch...
Found in an English documentation from the 90's, this circuit makes slow logical pulses audible,...
This simulation shows how to test an IGBTs using a signal source and the virtual oscilloscope of...