This 1965 Philips circuit uses old company transistors like the BFY51 and BFY50. The circuit is powered by 12 V and the power gain is 8.9 dB.
Found in a PE Hobbyst Handbook, this circuit checks if there is voltage in a power outlet by...
Here is a high-quality intercom for demanding readers. The circuit is from a 1982 documentation. Of course,...
This circuit shows how to use a low current read switch to control high power loads. The circuit...