Source: LED LIGHT CONTROLLER Affordable No Shipping No Tax

I've got one of those on My bedtime reading light, but I stripped the guts from the Box to fit inside my light. Bought it on Amazon for ~5 bucks, free shipping.

It has no Heatsink.

It works well on my Sub 0.1 amp LED reading light. I feel the dimmer light allows me to fall asleep faster.

When used to control a 1 amp 92mm 12v muffin fan, the muffin fan whined at slower speeds.

I got a 25khz 10a pwm controller that lowers the fan speed without whining, but curiously when powering some CREE LED's, the LED's whine when dimmed.

http://www.amazon.com/Converter-12V-36V-Adjuster-Controller-Driver/dp/B008BGLMYS/ref=pd_sim_sbs_e_4?ie=UTF8&refRID=04X9D8PM9FTJSDXGPVWR

They are available for less if one searches. I first bought this model from Ebay, but it came horrendously packaged and was missing the parts for attaching the wires. They sent me another, and now I have 3.

Got two and they're great. The cooler one is an in-line module that runs from an RF remote complete with presets for around 8-10 bux

Last year car/tent camping I used one of these plus a pair of 12V 10W LED floodlights on a pole and a 12V 8AH SLA battery to light up our campsite.