Step 3: The PCB design

This is the PCB design, i had to make this one on eagle since it wasn't supplied.

the powerPCB.pdf is a blank (no components visible), powerSchematic.pdf is for placement and powerSchematic2.pdf is a reference for placement (use it with the schematic to find out the components' values)
What would the current limit be on this unit. I need about 5 amps and I have a transformer large enough to handle the current. If not could you recommend alternatives. Thanks
<a href="http://www.mouser.com/ProductDetail/STMicroelectronics/LM338K/?qs=9NrABl3fj/pQRITdRVH5tA%3d%3d">http://www.mouser.com/ProductDetail/STMicroelectronics/LM338K/?qs=9NrABl3fj/pQRITdRVH5tA%3d%3d</a><br /> might be what your looking for<br />
same here. i need about 3 amps, a little less. also need it to have an overhead voltage of ~ 1v
This is a nice project, but I have to add a few comments.<br/>1. An LM317T is nominally rated for 1.5 Amps only. This means the maximum you can draw is 1.5A.<br/>2. The regulator has an overhead voltage of about 3V. Running from a 12V supply, you'd be able to get an adjustable range of 1.2V to 9V<br/>3. Be careful of the Total Dissipated Power(TDP). If regulated to say 5V, there is 7V dropped across the regulator. Now say that you are running a light bulb consuming 800mA. The TDP for the regulator is 7V x 800mA = 5.6Watts. This will require a heatsink to get rid of the heat generated.<br/><br/>Hope this helps.<br/>
This looks great, but a few pictures would be helpful.
yes i am sorry abt that, only decided to write down the instructable after i was done !!! anyway i am doing another project that i will photograph each step, they will be similar except for the design on the pcb, i will update this instructable with the link once am done
Ya that is what I guessed, maybe if you added a few more photos of the finished product that would help also.

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