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41 LED Flasher Circuit using 555 IC Answered

ok I've managed to get the single LED working but not the rest what am I doing wrong ????????



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4 years ago

What is value of capasitor from pin 5 (in my circuits it is always 0.01uF-10nF). With 0.01uF on pin 5(I really don know for what thar cap is) and resistors and capasitor there is 4.75Hertz and its OK. I was carculating and i dont know what voltage your LEDs are, so lets say 3V. You need to put your LEDs in parallel, not in series and use 1 resistor of 7.5R (or similar) with power rating of 2W if you use 20 LEDs.

It was just example, so you can change that

See this site http://www.hebeiltd.com.cn/?p=zz.led.resistor.calculator

Image shows how to put LEDs in parallel!

PS. I dont know english very well, if there are some mistakes im sorry :)