How much current does this switch draw (BLF A6 tailcap-mod)?

6 posts / 0 new
Last post
lfowner
Offline
Last seen: 2 weeks 3 days ago
Joined: 01/18/2013 - 17:32
Posts: 102
Location: Germany
How much current does this switch draw (BLF A6 tailcap-mod)?

Hey guys,


 


today I’ve modded the simpliest thing what’s to mod on a BLF A6 or Astrolux S41: I’ve changed the tailcap-switchboard to one of these from banggood:


https://www.banggood.com/Astrolux-SCSS-BLF-X5X6-Flashlight-Lighting-Switch-For-DIY-p-1102279.html


It’d a really slightly nice blue, perfect for spending a night in an hotel. But: What current does it draw? I’m using my lights with 18350 with 1000mAh…


 


Umm. Definitly wasn’t my best idea, now long click (going back) doesn’t work any more. Facepalm Modded back to normal switch… Sad

Edited by: lfowner on 11/17/2018 - 18:35
Kame Sennin
Kame Sennin's picture
Offline
Last seen: 1 week 3 days ago
Joined: 09/24/2018 - 14:38
Posts: 155
Location: France

I don't have one but if the picture on BG is right you have two blue leds, each with a 15k serial resistor (code 18C)

A blue led should be about 2.7V at low current, say you have 3.7V (batt) - 2.7V (led) = 1V remaining for the resistor so that is 1/15000= 67uA for each led

The overall current for the two leds is about (depends a lot on the battery voltage and real led voltage) 130uA = 0.13mA

1000mAh/0.13mA = 7700h = 320 days for draining the battery (rough approximation)

 

I see your last comment only now ... well at least now you know Wink

 

mrheosuper
Offline
Last seen: 34 min 3 sec ago
Joined: 09/30/2016 - 12:44
Posts: 1279
Location: Ho Chi Minh City, Vietnam

i think you need to reduce the bleeder res at driver side, maybe 470 will work

Forgot my pen

lfowner
Offline
Last seen: 2 weeks 3 days ago
Joined: 01/18/2013 - 17:32
Posts: 102
Location: Germany

So this would work if I desolder driver, modify it and solder it back? Too much work for just a little fun…

EDCba
Offline
Last seen: 13 hours 21 min ago
Joined: 08/25/2018 - 01:10
Posts: 106

The switch I bought from the Convoy store draws 8 mA. Yeah it messes up your modes, that’s why I couldn’t get biscotti.

lfowner
Offline
Last seen: 2 weeks 3 days ago
Joined: 01/18/2013 - 17:32
Posts: 102
Location: Germany

Thx all of you! Smile