-all of 10 drivers works fine
- good soldering of comonents on PCB
- contacts seem to have some gold on surface (not tested, but i think so)
- easy to modify to 350-700-1400mA (by cutting some lines on PCB and unsoldering elements or solder elements from another same driver) -Heats at full load. May be it's a con, but not for me (good thermal paste ... Read more
-great and simple mod to fix direct drive lights
-small size -does not get to hot at 4.5v
-does not flicker like a $20 driver i bought recently -gets very hot at 6v (max component ratings)
- i blew one board doing a test (to see if it could handle 7.5v-it can't!) it is very easy to add/remove 7135 chips to make -350ma
-1050ma (as supplied)
-1... Read more
Well made standard sized 17mm driver, works great with a single 18650 battery. Thanks to 3 AMC7135 chips, runs very bright all the way down to 3.4V or so before I could detect much dimming and still quite bright. In even a thin walled light does not make the emitter produce excessive heat. Drives R2, Q5, and Q2 emitters with amazing results. Easy install ... Read more
These units are small (17mm diameter, 3mm (approx) height) and easy to use if you have a good soldering iron.
They provide good efficiency if Vin is close to Vout (4*NiMh with a 3.5 to 4.0Vf LED, for exemple).
Reverse polarity protection is efficient and does not reduce performance (only the current needed by the chip itself flows thru the diode. The ... Read more
Dead simple to use and they seem to work fine. They dont get very warm while in use.
I only noticed a slight temperature increase. I had to guess the pin out. Fortunately I guessed correctly.
The center connection is GND for both power in and the LED.
The outer ring is + for power in.
The positive terminal for the LED is on the missing IC's place and ... Read more
-Can disable/remove 1 or 2 of the 7135s if a lower current is desired
-Thermal protection works -one of the boards had a mis-alligned 7135 soldered on
-contact pads could be better marked Since this was a 10-pack, I tried pushing a board to its thermal limits by running it at full load and a varying input voltage to test how far it could ... Read more
Great little low priced regulators. Cheaper than many other boards that perform similar tasks. They only come in 10 and 20 packs. These require mid range input voltages. I tried to use these in a 3d 3 LED mod but I guess I didn't think of the tremendous draw from the cells. Needless to say it didn't work. You can only power 1 of these boards from 3 ... Read more
Rugged well protected against ubuse, polarity protected via "idiot diodes", cheap, can be configd. for 350/700/1000ma with modification. very fiddly tho. Took me a while to sort out a fault with using one particular LED. see comments & questions. tiny to solder if you are not used to it. Have since used other led's with great success, ... Read more
Regulated 1A output from 3xD sized alkaline cells in my MAGLite. Current draw from the batteries was approx 900-1000mA. Only supports up to 4.5V. Would be great to have a circuit that output 1A and could take a supply of 9V or greater. Bridging the jumpers to enable the 2nd and 3rd AMC7135 components is a delicate job if you only have a standard soldering ... Read more
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