Retrobrad Presents! An Electronic LED Tea Light Candle Hack.
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Uploader Comments (00retrobrad00)
All Comments (23)
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@brokenbylaw2 Changing the resistor values will only change the current going through the LED's so this will change the brightness of the LED's
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@brokenbylaw2 A microcontroller would be the easiest method although you can still make it change / cycle through the different colours just by using a 555 timer chip and a 74193 counter chip. This would just make it change from black, red, green, orange, blue, magenta, cyan and white and then repeat.
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@brokenbylaw2 Changing the resistors will only vary the current going through the LED and therefor will change the brightness of each colour.
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@brokenbylaw2 A microcontroller would certainly be the easiest method, especially if you wanted to actually fade in and out of colours. if you wanted to just make it change colours (without fading) then you can easily do it with a 555 timer and a 74193 counter. all up the circuit could be made for a couple of bucks.
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@00retrobrad00 do you know of any easy ways to make it fade in and out of colors.. would a microcontroller be required?
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@00retrobrad00 also, this led is rgb.. so red green blue, and green+blue/blue+red or whatever.. so if i change resistors it will not change colors with the change of voltage as i thought when it ment 5+volts 6+volts 4+volts
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@brokenbylaw2 a 9 volt battery will be perfect. make sure you use at least a 150 ohm resistor for each of the three legs. You will find as you connect up each leg, you will get a different colour. You can also mix colours bu turning on multiple at a time.
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@00retrobrad00 by +5 you mean 5 or higher? so like a 9volt with a resistor?
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So the metal canister is your resistor?
Fuzzball 1 year ago
@Fuzzball Very good question! There is no added resistor with this circuit, it actually uses the internal resistance of the battery. The metal housing is just a short circuit
00retrobrad00 1 year ago