i have one of those mist humidifiers with changing led lights in it, and i don't know where i can find those. do you have them?? | |
Answers:
From: Christopher
Ive seen a couple sites with them. http://www.superbrightleds.com/TriColor%20LED.htm is one. it is actually 3 leds in one package. that site allows to have common anode or common cathode. your preference depends on the application. Cathode is where you put the lower voltage. the negative side of your power supply.
Note that changing the voltage is not a very good way to change the brightness of each LED color. The better way is to use what is called PWM (pulse width modulation). all this does is turns the LED on and off really fast. The ratio of the time on and off decides the perceived brightness (using persistence of vision). there are plenty of good pwm circuits online. google for "pwm 555 led" or maybe "pwm 555 led circuit" and you should find suitable ones.
If you have more questions, please feel free to email me at slithytove2 at gmail dot com.
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