Found in a 1980s German publication, this circuit tests batteries by type. The circuit is based on a range of LEDs of different colors and is given a table with indications for various voltage ranges.
I found this circuit in an ond publication from 1958. The transistors are germanium types but the...
An advanced motor control software plug-in for Microchip’s MPLAB® X Integrated Development...
Using two LM377s, this amplifier provides a few watts of audio in a low impedance speaker and the power...