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I stock many of the parts used in these Bike lighting projects, on my web store. Here is the link to my web store page with bike lighting and P7 LED parts. Click here to go to my web store Click here to go back to the Main Bike lights page |
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I stock many of the parts used in these Bike lighting projects, on my web store. Here is the link to my web store page with bike lighting and P7 LED parts. Click here to go to my web store Click here to go back to the Main Bike lights page |
| Making a 2.8 amp (2800ma) current limiting board with 5 way functions | |
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Left: A 1050ma - 5 way board with one more
7135 current limiter chip added to make it a 1400ma
board. Right: 1400ma Board jumpered to the 5 way board, which is now a 1400ma board Note that the last 5 way boards I received from DX did not have a place for a 4th 7135 chip, they changed the design. I sold all the 6190 boards I had because they were no good for the mod without a place for a 4th chip Notes: The rear gold areas on these boards are connected through the board to the other side with gold circuit traces. You can connect your Battery + and Battery - connections to the rear of the boards and the front side will be connected automatically Your boards may look different from these Some boards I have seen have nice round pads on the front where you can easily solder your jumper wires. Here's the basics of how it is all connected The Black wire on the left photo is the LED - connection = Blue text The Red wire on the left photo is the Battery + connection = Red text The outside ring on each board is the Battery - connection = Black text You make a Battery + and Battery - to one board, it does not matter which one. You can use the backs of the boards to make these connections You make a Battery + jumper from one 7135 chip + on one board to a 7135 chip + on the other board You make a Led - from one 7135 chip LED - on one board to the LED - on the other board You make a Battery - jumper from one board to the other board The LED + is connected to the Battery + connection. The back of the boards may be easier to make the LED + connection point The LED - connection is made to the front of either board at one of the LED - points  The Boards are then folded over into a sandwich and the Battery - connections are jumpered together. |
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The LED below is a SSC P7 900 lumen LED. I have wired up a test rig using 3 x 3.6volt 2400mah Li-On batteries wired in parallel. A flashlight clicky switch and the Board sandwich. The LED below was drawing over 3 amps when hooked straight to the battery pack without any current limiting. |
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| Function one is full blast with 2.9 amps (2900 ma) of current limiting. | Function 2 is Low 1 which was limited at .83 amps (830 ma) |
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| Function 3 is Low 2 which was limited at .15 amps (150 ma) | Function 4 was a constant flashing mode which was limited at 1.2 amps (1200 ma) |
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I don't show function 5. It looked like it was
flashing S.O.S.
The flashing would start, do some Morse code flashing and then stop for a few seconds It would start over again after a few seconds. |
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| Back to Bike lights page | |
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