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re: axiompowercorp products.
They looked really good to me, so I ordered a batch.
Anyway, got the sign modules in, and had to play with one in the lab this AM.
The come pre-wired, daisy chain style, on a fat spool
This model are made from simple resistor current limit gadgets, not the constant current drivers like I'd hoped they'd be. The resistors heat up a bit, but not too terribly, and almost anything as a heat sink on the back, cools things right down. They are only spec'd for 12.0V, and on the solar system, with a night light switch, should seldom see anymore than that, and I made a few tests with a couple of 1N3611 diodes, to see what their voltage drop would do to the module. (attached notes on PDF)
There is no lens or optics, just the bare LED, and the beam from the two emitters is fairly broad. I could see using a couple of these in a house, as low level night lighting, to avoid having to switch on lights just to navigate around in the dark.
Attached PDF shows how resistors (100 ohms) are wired (4 in parallel, and two parallel banks in series) to spread the heat around. (entire module 1.8W spec, I calculated about 1.5W)
All in all, I like them, Not real high intensity, but good enough. Too bad the shipping & handling costs (from Las Vegas) were killer for 4 day surface.
They looked really good to me, so I ordered a batch.
Anyway, got the sign modules in, and had to play with one in the lab this AM.
The come pre-wired, daisy chain style, on a fat spool
This model are made from simple resistor current limit gadgets, not the constant current drivers like I'd hoped they'd be. The resistors heat up a bit, but not too terribly, and almost anything as a heat sink on the back, cools things right down. They are only spec'd for 12.0V, and on the solar system, with a night light switch, should seldom see anymore than that, and I made a few tests with a couple of 1N3611 diodes, to see what their voltage drop would do to the module. (attached notes on PDF)
There is no lens or optics, just the bare LED, and the beam from the two emitters is fairly broad. I could see using a couple of these in a house, as low level night lighting, to avoid having to switch on lights just to navigate around in the dark.
Attached PDF shows how resistors (100 ohms) are wired (4 in parallel, and two parallel banks in series) to spread the heat around. (entire module 1.8W spec, I calculated about 1.5W)
All in all, I like them, Not real high intensity, but good enough. Too bad the shipping & handling costs (from Las Vegas) were killer for 4 day surface.
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