LED stip light dimmer ?

AGCB

Is this just a resistive dimmer or do you think it's some other type of circuitry?


http://www.amazon.com/gp/product/B007RFMY1O?psc=1&redirect=true&ref_=ox_sc_act_title_5&smid=ATVPDKIKX0DER

In other words, is it easy to make from common components?

Thanks, Aaron

Leon

It seems to use PWM, from the comments. I'd use a suitable MCU to make one.

AGCB

Thanks Leon

erco

Dollars to donuts that an adjustable power supply would do the same thing, if you just want to reduce the brightness. I have a 1A wall wart that ycan switch to several different voltages between 3V and 12V that would probably work fine.

tonyp12

You don't dim LED's with a lower voltage, too low and the blue LED's 3V cut out voltage and you get no light at all.
Yes all white LED's start out as blue LED, with remote phosphor added in the epoxy coating.

Use something like this.
http://www.mouser.com/ProductDetail/ROHM-Semiconductor/BD60A00NUX-TR/?qs=X772OquulpXGFa5G5BDB9g%3d%3d
more power
http://www.mouser.com/ProductDetail/ROHM-Semiconductor/BD555A1AFV-E2/?qs=X772OquulpWhVxu4UIseLg%3d%3d


To dim a led light from old fashion 115v triac wall-switch complicates everything as it cuts out the power instead of sending a pwm control signal.
The 60Hz is to low for LED and you will see flickering, so the circuit needs to "read" the triac as to see what dim level you want
but also need to store enough energy so the dimming can be done at 1KHz+ instead.

AGCB

Thanks, I'll try PWM

Aaron