Motion Sensor and LED's - How to Make Circuit

Mar 05, 2007 7 Replies

Hi,



Im having some difficulty trying to make a circuit. I want to create a desk lamp which only switches on/off when you wave your hand across the sensor.



I will be using



4x AAA batteries 1.5v Each 1150mAh
8 LED 3.6 Forward Volts - 20mAh
120 ohm Resistors

Not sure about the sensor and other components..



Please can someone help me specify the materials and circuit layout.



Thanks



Maybe try an infrared phototransistor and infrared LED cct for motion detection. D from BC

I have seen some clever circuits (probably in EDN design ideas) that used the LED's as a photodiode as well

Wim

I would suggest AA cells over AAA cells.

Sure, for US$60.00/hr.

Good Luck! Rich

I thought that for a second, but ckt is more common, though probably less correct.

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required