Am I the only one who wants to run an XHP with a single cell!?!?!?

Flashlight Modding and DIY Parts
61

Anybody tried this driver?

http://www.kaidomain.com/p/S026606.H1-A-20mm-3A-1-cell-5-Mode-Boost-Driver-Circuit-Board-for-Cree-XHP50-6V-MT-G2-MK-R2-(~~1-pc~~)

62

Good question.

It should work for a 6V XHP LED since its 3V in and 6V out.

Here are the given specs (cut & paste from Kaidomain):

Input Voltage:
3V - 4.2V ( 1 Li-ion )

Output Voltage:
6V - 6.8V max.

Output Current:
2900mA - 3000mA max.

Mode:
Very Lo(5) > Lo(35) > Med(65) > Hi(100)
Hidden Strobe: Double Click

Feature(s):

  1. Constant Current, No PWM

  2. Low Voltage Warning:
    When voltage is below 3V, it will keep flashing.

  3. Memory function : ( > 3 secs)

Note:

  1. The driver does not have battery reverse protection. Please make sure the battery is connected in the correct way.
  2. The max current from battery can be up to max. 8A, high drain battery is recommended for this driver.
  3. Better heat dissipation is essential for this driver.

Dimensions:
20mm ( Dia. ) x 1.6mm (Thickness of PCB)
x 7.5mm (Thickness)(including all component)

Note:*And that 20mm diameter board is where its weakness is. Won’t fit a P60 drop-in. Wish it were a 17mm board.

What hosts out there accommodate a 20mm driver board?

63

Convoy L2, Eagle Eye X7

64

Look like there already exists a commercial driver for this purpose! Though if anyone is interested, I also made a 6V 3A boost driver (oops note typo on silkscreen). But otherwise it's a same single cell boost driver designed for the XHP50 / 144 6V LEDs. It can also be easily modified for 12V out operation - will work fine as is due to constant current control, but will not be as efficient since the components were chosen specifically for 6~V out.

I suppose the only benefit over the stock driver is more programmability with a ATtiny84A on board as well as true 256 levels of constant current brightness adjustment and 92% efficiency at 3A 6V output. It also features 3 additional GPIO for mode select / E-switch button operation, mode memory, as well as temperature and voltage control. More features available also with any firmware of your choice ^_^

65

> EDC
http://edc-light.com/6a-boost-driver-for-dqg-26650_p0903.html
link is 404 Not Found

I’m sure eager to see y’all succeed with this, it’s beyond my skill level and I want drivers to make some 1-cell triple lights.

66

Looks great!

Note to self: Here is the latest thread on the boost driver as mentioned above. Looks like it will work with an e-switch too.

GXB20 Driver – Homemade Constant Current Programmable XHP50 Single-Cell Boost Driver

67

http://www.cnqualitygoods.com/goods.php?id=2198

68

Just got my H1-A and H2-C drivers. Will let you all know what these guys can do as I play with them over the next few weeks.