LM3914 is used as the basis of a 10 step variable brightness current-regulated white LED torch. This circuit has only four components in the control and regulation circuit: R1,R2, VR1 and LM3914.
Part List
1. IC - LM3914
2. LED1-10 - 10 white led
3. R1 - 620 ohm
4. R2 - 100 ohm
5. VR1 - 100 k pot
6. C 1 - 10 uf 16 v
7. Power - 3-4.5 volt
8. Suitable cabinet and a general purpose PCB.
