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Can’t run my DTR driver when the battery is in the case

cosmonaut

New member
Joined
Mar 26, 2019
Messages
11
Points
3
Hi y’all, I’m running an ACS1500SE from DTR inside a convoy flashlight housing with an 18650. My driver works just fine as I can hook my bench top supply to the + spring terminal and the case, powering it with no issues. I can also attach those leads to my battery externally and power it just fine. When I put the battery in the case and screw it down however, it won’t turn on. I’ve checked the continuity of the case/back cap/front cap and it’s fine. I’ve for shorts and found none. I’m so confused why this could be happening. The resistance of the case is minimal- like 0.5 ohms so it’s not dropping the voltage (since it works with leads outside the case.
 



Dud445

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Sep 4, 2020
Messages
182
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43
It's probably as simple as the battery top being too flat. Show some pictures.
 

Giannis_TDM

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Apr 27, 2019
Messages
393
Points
63
Hi y’all, I’m running an ACS1500SE from DTR inside a convoy flashlight housing with an 18650. My driver works just fine as I can hook my bench top supply to the + spring terminal and the case, powering it with no issues. I can also attach those leads to my battery externally and power it just fine. When I put the battery in the case and screw it down however, it won’t turn on. I’ve checked the continuity of the case/back cap/front cap and it’s fine. I’ve for shorts and found none. I’m so confused why this could be happening. The resistance of the case is minimal- like 0.5 ohms so it’s not dropping the voltage (since it works with leads outside the case.
What diode are you using? FYI some diodes have their - or + hooked up to their brass case.
 

icecruncher

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Jan 2, 2008
Messages
1,405
Points
83
3 probable possibilities already stated! BUT without at least knowing the color and type of diode its impossible to tell. With that driver it could be a lot of different diode combinations.

1.as stated it could be a non-neutral case diode
2.as stated it could be a battery connection
3.could be something else related to driving the signal through the driver and/or battery then back to driver.
(for example you could have a bad bottom button.)

post the diode
post pics of each setup
 

Lifetime17

Well-known member
LPF Site Supporter
Joined
Dec 15, 2014
Messages
6,220
Points
113
Hi,
Sometimes the coatings of flashlight mods interfere with a positive grounding through the host. try sanding were the heat sink touches the bell of the host and sand a bit on the threads . Tailcap, battery tube to the bell , anodizing might be the issue .
Rich:)
 




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