Position: Index > Lamp Circuit >

Three-Way Touch Lamp

2016-08-04 14:04  
Declaration:We aim to transmit more information by carrying articles . We will delete it soon, if we are involved in the problems of article content ,copyright or other problems.


A three-way switch to control a lamp (off-dim-bright, etc.) uses an NE555 timer to generate a one-second pulse, trigge
Three-Way Touch Lamp

red by ambient ac fields that are picked up by the human body. CI and D1 form an input network. U2 is a decode counter/divider and drives one of 10 outputs (three are used). The logic outputs drive various resistors in series with the LED in the optocoupler. The optocoupler controls a triac that is in series with a load (lamp, etc.). By reconfiguring the outputs of U2, more than three brightness levels can be obtained, up to 10. An IN914 and resistor will be required for each output.



Reprinted Url Of This Article:
http://www.next.gr/light-laser-led/lighting/three-way-touch-lamp-l14153.html