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led wiring with 12 volts in AA batteries Answered

i just made a huge 50cm x 130 cm inifinity mirror with 2 strands of 3528 led strip lighting left over approx 1' long left over. I am on the attempt of making small portable infinity mirrors and coaster seem like the best idea for them. i wired it all good and i am done now however i appear to have a problem

Step 1: Infinity Coaster

everything works well until it has been left on for 2 mins. even when i turn off the lights, the batteries get super hot. They are cheap dollar store AA batteries but almost too hot to touch even when it is turned off.

i figured maybe i have a short somewhere but i cannot find one with the multimeter.

is it just that i have too much amperage for too little of an LED strip?


they stopped turning on the lights when they got hot but i tried again to shoot this video clip and they worked pretty good. A little slow to light up still so some of the juice is gone i imagine.

if you know these strips give me a clue. if i find out the problem, i can make a solution and make another instructable on how its made with # 2. it is Christmas after all and somebody needs a coaster for their egg-nog. 

these pics arent great let me know if you wanna see wiring more clearely


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4 years ago

I did a really weird stupid wiring problem. batteries were 100% shorting out on the switch (i soldered it that way) but the switch still cut power to the lights. i had 3 wires going to the switch 2 of which were negative and one was positive on the leads. that fact that i could turn the lights off made me think that it was good. i left the batteries in all night and they turned it on this morning (probably didn't short out all night :P) .

Here is the power schematics, you can let me know what to expect for power consumption. i did read about 9v batts and how they get to hot so i didnt use them. The measurement of the strip is 20 " but only 2/3 of the lights are wired to go on on both coasters i made


2× 5M LED Strips (32.8ft)

* LED type: RGB SMD 3528(Non-WaterProof)

* LED Quantity: 300led/ 5M

* Working power: 48W/5M

* Working Current/meter: 0.35-0.4A

* Working Temperature: -20 to 50°

* Luminous Flux: 390-540 Lumens/Meter

* Size: L500cm (5M) xW0.8CM xT0.30cm

UK 3 Pin 6Apower supply:


DC: 12V-6A

Demension: 120mm (L) x 55mm (W) x 30mm (H)

Length: about 250cm (include power cable)

Length of the charger cord: About 142 cm

Length of the power cord : About 108cm


Power Polarity: Centre positive

24 Key IR Remote Controller

Connection mode: Common Anode(+)

Input/Output: 12V

Output: three CMOS drain-open output

Working Temperature: -20℃-60℃

remote controlled distance: about 10 m


4 years ago

dig up the specs on the led strip. How much current? Look for number of m A.

You are using 8 AA Batts, yes


4 years ago

First rule of powering things from small batteries: Make sure you won't use too much energy.
Without specs on the LED strips and the actual number of LED's I can't calcultate how much current the would need.
But unless you used the smallest ones available you won't have much luck on AA batteries.
3528 is quite big and they use a bit of power...
Better would be to use solar rated LED's instead or high brightness ones at much lower current than rated...