This circuit can be used to power 6, 9 or 12 V devices in your car. The maximum current is 1.5 A. The circuit is from a 1983 Electronics Hobbyist Handbook.
The output transistors of this circuit can be TIP31 and TIP32. The other transistors admit...
This oscillator with crystal for overtone operation was found in an old American documentation. The coil...
Old multimeters used a 22.5 V battery for high resistance measurements. If you have one, you...