Hope everyone had a good festive season.
I'm looking for some information about a lamp I'm trying to make. It's incredibly simple, I've got an "LED Electronic Converter" (basically a power supply to convert the 240V to 12V), 3 High Power LED's (specifications at the end of the post), a 1W 1 ohm resistor, and some wires.
I've soldered everything together, and switched it on, and boy was it bright, blinded me for a while. But then the light started to flicker, so that was alright, figured it was just a bad solder joint (which you won't be surprised by when you see the photo below). So I went through and made sure that all of the solder joints were getting good contact with the LED star plate, and then switched it on again. This time it turned on, but the LEDs were incredibly..... dull. They were maybe around 10% of full brightness. So dull that I could actually look directly at the lights, and be able to see the wires and inspect everything.
So my question is, am I missing something? These are powerful LEDs, is my power supply insufficient? I really don't think it is, it's supposed to handle 2.5A, and the LEDs will be drawing around 700mA total, perhaps there isn't enough power draw?
Anyway, if someone could please point out what could possibly be going on here, that would be great.
Thanks.
LED Specs (copied from the eBay page):
Chips: Epistar
DC Forward Voltage: DC 3.2-3.8V
DC Forward Current: Typ 700mA
Power Supply Specs in attached image