Hi, I had unexpected experience yesterday from the testing device I made. I bought a green Laser module to build a cross line level. Power output: 50mW Wavelength: 532nm Threshold current: 250mA Maximum current: 350mA Requirements Voltage: 3V Working Temperature: +20???30? Storage Temperatu…

I don't see a real heatsink on your laser - what was the specification for its duty cycle? Usually well under 50% averaged over a couple of minutes for a laser (pointer module) rated at 1W input. You were of course using alkaline batteries, were you not? Not "plain" Zinc-Carbon. Triple-A? 350 mA? …

There are so many power supplies for your setup, just search your local hardware shop. And you are "Assuming" that your cells are 1000mAH right? Where they rechargeable cells or one-time-use? Rechargeable cells have the tendency to measure 1.7V when charged but after a small load is applied they d…

18650 rechargeable 3000mAh Lithium-ion battery seems good candidate for the device.

As you've discovered, batteries marked 1.5V hardly ever give 1.5V (they give a variable value down to about 1V depending on load and lifetime)). You need more batteries (higher voltage) and something like this: Pololu Step-Down Voltage Regulator D24V6ALV The more batteries, the longer it will last…

janpenguin: Connecting 10 AAA batteries in parallel increase the drain to 100 mA, which is stupid setting IMHO. Connecting batteries in parallel is a very bad idea. Don't do it.

Question of selecting the right battery for 3V, 350mA Laser module.

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Paul_B September 8, 2014, 12:48pm 5

Indeed it does!

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Question of selecting the right battery for 3V, 350mA Laser module.

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