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Topic: Connecting Flashlight to AC Power Plug (Read 2125 times) previous topic - next topic

mashduino

Hi all,
I'm hoping to connect a flashlight to a wall plug and am a total electronics newbie and am hoping for help. I know this isn't exactly Arduino related (the project is but not this part), but I figure someone might be able to help!

This is the flashlight: http://www.amazon.com/dp/B0092Q1N7W/ref=pe_175190_21431760_M3T1_ST1_dp_1
...runs off of 3AAAs, I think in series, so 4.5v.

Can I cut off the tip of a 5v AC Adapter (such as this: http://www.amazon.com/Power-Adapter-1000mA-Output-Supply/dp/B007MH75J8/ref=sr_1_8?s=electronics&ie=UTF8&qid=1367376885&sr=1-8&keywords=AC+adapter+4.5) and solder it onto the positive and negative terminals of the battery pack and expect it to work when I plug it in? I don't want to ruin the light. Any help is much appreciated!

runaway_pancake

I'll go with... "OK"
Try alligator clips instead of soldering.
"Who is like unto the beast? who is able to make war with him?"
When all else fails, check your wiring!

CrossRoads

Not that one. You want 4.5V DC instead.
http://www.dipmicro.com/store/DCA-04510
Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.

sonnyyu

#3
May 02, 2013, 05:29 pm Last Edit: May 02, 2013, 05:32 pm by sonnyyu Reason: 1

This is the flashlight: http://www.amazon.com/dp/B0092Q1N7W/ref=pe_175190_21431760_M3T1_ST1_dp_1
...runs off of 3AAAs, I think in series, so 4.5v.


The title is "Ultrafire 1800 Lumens Zoomable Cree Xm-l T6 LED 26650 18650 3x AAA Zoom Flashlight Torch Lamp"

26650     3.7v ~5000 mAh
18650     3.7v ~3000 mAh
3x AAA    4.5v ~1150 mAh

I guess it should work with 3xAAA NiMH battery

3x AAA/NiMH    3.6v ~800 mAh  

1800 Lumens could be misleading,  Cree specification is 280~692 lm for Cree Xm-l T6 LED.
Even Cree specification could be misleading, the output base on Tj=25C , to meet this only 2 places at earth north/south pole.
The LED industry is truly Wild West.



One sample LED driver IC MH6914;-



Change RIset value allow change constant current from 30 mA to 1000 mA.

The AC Adapter should be 3~5 V /2A.













mashduino

awesome- thanks! "The AC Adapter should be 3~5 V /2A" is exactly what i wanted to double check. yeah, i certainly don't think they are 1000 lumens, but they are bright enough for my project. and not all that expensive on amazon.

thanks again for your help!

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