Hacked Gadgets Forum

November 15, 2010

Constant Current Source Project

at 6:50 pm. Filed under Computer Hacks, DIY Hacks, Electronic Hacks, Insane Equipment


YourITronics has a good article on making a Constant Current Source using a Texas Instruments TPS54232 chip.The TSP 54232 is a flexible little chip but you will need to get out the fine pitch soldering iron tip and cut down on the coffee since it is only available in a surface mount package. There is an interesting DIY thermal via system that is used on the board to allow the non-etched copper of the back of the board to be used as a heat sink.

“The solder drops that you can see on the back of the board are a sort of DIY thermal vias. I’m not sure how efficient they are but I gave them a try with this board, probably because I had too much time available. First when I designed the board I included a area of copper in the top layer right beside the resistors. Next I drilled some 0.7 mm holes and I placed 0.7 copper wire in the holes securing it by soldering on both sides. The trick is to make the solder joint as small as possible so it doesn’t spaces your component from the board. As I’ve said I don’t know their efficiency but I think they work, I can feel the heat transferring from one side to the other faster. If you like them you can try them.”


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4 Responses to “Constant Current Source Project”

  1. Gio Says:

    I’m curious to know what is used to affix the heatsink to the cement resistors.

  2. Whatnot Says:

    You said ‘wholes’ instead of ‘holes’ by mistake.

  3. Alan Parekh Says:

    Thanks, that was in the quote from the article but I have corrected it in the text.

  4. Whatnot Says:

    Aids clarity because even though everybody knows it’s hole you are distracted mid sentence in this case I find, at least I am.

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