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.
The signal injector illustrated in the figure uses a single integrated circuit and generates...
Motors up to 2 A DC can be controlled by this circuit that we find in the manual for linear...
Place the lamp on the ignition threshold via R2. Your approach causes it to light up. The secret is...