Colin Mitchell
- Aug 31, 2014
- 1,416
- Joined
- Aug 31, 2014
- Messages
- 1,416
TRANSISTOR and LED TESTER - 3
Here is another transistor tester. And it also tests LEDs. See the full project: Transistor Tester
This circuit is basically a Joule Thief design with the coil (actually a transformer) increasing the 1.5v supply to a higher voltage to illuminate one or two LEDs in series. The "LED Test" terminals uses the full voltage produced by the circuit and it will test any colour LED including a white LED. The two "coils" are wound on a 10mm dia pen with 0.1mm wire (very fine wire). All the components fit on a small PC board. A kit of parts for the project is a available
TRANSISTOR and LED TESTER
Here is another transistor tester. And it also tests LEDs. See the full project: Transistor Tester
This circuit is basically a Joule Thief design with the coil (actually a transformer) increasing the 1.5v supply to a higher voltage to illuminate one or two LEDs in series. The "LED Test" terminals uses the full voltage produced by the circuit and it will test any colour LED including a white LED. The two "coils" are wound on a 10mm dia pen with 0.1mm wire (very fine wire). All the components fit on a small PC board. A kit of parts for the project is a available
TRANSISTOR and LED TESTER
