This test circuit was found in the PE Hobbyst Handbook in a 1990s edition. The circuit tests the battery under load. The load, as the battery is selected by the switch.
This circuit is from an Italian publication called Fare Elettronica from 1987. What we have is an...
This circuit aims to recover electrolytic capacitors by applying currents higher than normal for a...
In the figure we have the way to use a low-cost digital clock chip to trigger an alarm. The...