LED Torch with adjustable brightness

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.

ledtorch_adjustablebrightness
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.

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