In my last blog I asked for help with finding a lower profile capacitor for my PK2 programmer. The 47uf 25v part I was using was 11 mm tall. I wanted it no larger than 7mm tall but preferred to keep it the same diameter but couldn't find one that fit the requirements. On a tip from a reader I decided to try a 6.3 mm x 7mm cap that was on Digikey's online catalog under part number P834-ND. I measured it up and it was gonna be close so I ordered some. The order came quick as it usually does from Digikey and the results are in.
The cap is a success. It fits in the location without interfering with the neighboring resistor. The height is perfect as it remains one of the tallest parts on the board but no higher than the PIC18F2550 in a socket. So now I can get to work on a top and bottom plastic shield to encase the programmer.
I also had mentioned that the spacing for the inductor L1 was off, but I realized I hadn't bend the leads tight enough. If I bent them straight down off the plastic casing then the leads fit perfectly in the board. So the PK2 design is complete. Next step is the plastic case.
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Chuck has been programming with PIC Microcontrollers since there were only five devices. Now there are over 700 and growing. He also has a lot of fun 3D printing designs using his Davinci 3D printer and TinkerCad software. In this series of blog posts and occasional videos on his YouTube Channel he tries to help you get started with electronics and 3D printing.
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