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Step 4Assemble it!
At this point, you should have a battery with a wire soldered to the negative terminal, a second battery with a wire soldered to the positive terminal, and a third battery with nothing soldered to it.
Take the two batteries that have wires soldered to them and place them next to each other. Make sure the wires are on the outsides.
Take the third battery, turn it upside down, and plug it into the other two batteries.
Use the electrical tape and tape it up. I made sure the wires were taped up along the side of the upside down battery so they have some support. This way there won't be a lot of strain on the solder joint.
That's it! Congratulations, you have just made a simple, portable, cheap, pocket sized 28 VDC power supply!
Take the two batteries that have wires soldered to them and place them next to each other. Make sure the wires are on the outsides.
Take the third battery, turn it upside down, and plug it into the other two batteries.
Use the electrical tape and tape it up. I made sure the wires were taped up along the side of the upside down battery so they have some support. This way there won't be a lot of strain on the solder joint.
That's it! Congratulations, you have just made a simple, portable, cheap, pocket sized 28 VDC power supply!
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