well.. offically no, however and without getting technical.. a 50k pot (and/or have a wattage of 1/2 watt and higher) will operate in the capacity of a dimmer switch, so yes it will work as a dimmer, it's not a 'true' dimmer though.
if anyone cares about why it's not a true dimmer... (and it's technical - lite!)
's go into saturation when voltage reaches a cetain point (when they get 3.7v they turn on in other words) at 3.6v they should turn off, or drop out of saturation, and go into cutoff. however a pot will take a bit of the voltage from the leds, something in the few mille volt range to a full couple of volts, enough to trick the led
to turn on, but only so slightly. a true dimmer would be to build a circuit perferably using a common 555timer, with an adjustable duty cycle, to actually control the led
's output, in the mini seconds (similar to how to a tv reception works, where the incoming signal is actually compressed of a bunch of still images ran at ~60hz enough to trick our human eyes into thinking it's a moving image when it's actually a bunch of still pictures. interesting point: a common house fly can't watch tv, 60hz to slow to trick their eyes, they actually see all the seperate still images.. which is when you can never swat one without a fly swatter) in any case, using a 555timer is, imo
overkill.. just use the pot you'll be pretty happy with the results, it most likely will not be a smooth transition from max to lo (let's say you start at 100% turn the pot 1/4 of a turn and the led
's dim to 50% of their output, turn the pot 1/4 again they might jump to 10%) so their adjusted output will be non-linear. but with a steady hand and some patience you will overcome that down fall.
pots are fairly uniform, however their terminals can move around depending on manufactor and application, this pot is from radioshack, and it's a 50k linear pot (1/2watt rating)
Originally Posted by JProx
you will want connect terminal's A and C. if you connect anything else you will not have a variable output, it will be deadlocked at max resistance value of the pot, which happens to be 50k in this example.
if you hook up A and B = deadlock, B and C = deadlock
you keep asking questions, and i will keep knocking 'em out!
sorry about the late response, i was doing some furniture construction, and was out in the garage till.. just about now.