|Rocket Electronics & Recovery|
|Launch & Static Tests|
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|Iowa Amateur Rocketry Group|
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Here's an image of a PCB I made using my laser printer.
Here's the image file needed to print the PCB.
I added board holes for capacitors C1 and C2, although if you're using a clean power supply such as a battery, and all the runs are short, you don't need the capacitors at all, so just omit them (leave the holes open, don't short them out).
Here's a completed board next a bare board.
Vin is your positive power in, the power in should be at least 2 volts higher than the desired regulated output voltage. Vout is the regulated positive power out, and the two terminals marked - are ground for power in and power out. Depending on your application, you may need a heat sink on LM317, while it can output 1.5 amps, it does generate some heat even well below those levels.
Here I printed the LM 317 circuit on a larger board to accommodate an OEM GPS unit. The GPS requires regulated 3.3 volts. I will need to add a heat sink to the LM 317 as it starts getting hot after 5 minutes or so.