Need help with Bleeder resistor and lighted switch *resolved*

Flashlight Modding and DIY Parts
1

I have a light that I’m trying to add a lighted switch to.

  • The driver is a BLF Mtn 15mm driver with Guppydrv Rev1 firmware.
  • The lighted switch has 2 tiny leds each with a 910 ohm resistor.

With the lighted switch the driver malfunctions. Off-time memory doesn’t work, so the light always cycles to the next mode every time the switch is clicked full or half press.

I’ve tried each of the following as bleeder resistors between the positive and negative on the underside of the driver: 330, 510, 750, 910 ohm.

Nothing works.

Any suggestions? Should I change the resistors on the SMD on the switch? Or should I try a different value for the bleeder resistor and if so what?

2

You actually want to use the lit switch as a flashlight? Those values seem waaaaaaaaaaaay too low.

My Cometa has a blue lit tailswitch that’s so bright that I call the light itself my “big blue lighthouse”. (And I manually lock it out as a result.)

All you really need is a faint glow, because sucking too much current will do exactly that to the driver, make like the switch is barely there.

Values might depend on the driver you’re using, so I’ll defer to someone else as to what’s a “good” value to use.

You could, though, swap the 910s for, say, 2.2k or higher.

3

Thanks for the tips.

Got it working properly.

Swapped the resistors on the switch for a 7,500 on the blue and 75,000 on the green, with a 510 ohm bleeder resistor. The switch is much dimmer now, but it does its job of letting me find the light at night. :sunglasses: