Today I show you a little bit longer video about the assembly of the component side of the snow flake panel.
Compared with the very small 0402 LEDs (1mm x 0.5mm) on the front side, the component side contains just regular 0805 resistors and capacitors.
The first part of the video shows how I apply the solder paste using a metal stencil. I use a system called “eC-stencil-fix” from Eurocircuits. This is basically a set of plates with metal knobs to perfectly align the board with the stencil. With a tick in a checkbox, they produce panels which perfectly work using this stencil fix system, which is really convenient.
I ordered a single panel as a test for the production version of the plant watering sensor and I got astonishing perfect panels from Eurocircuits.
Even I only ordered just one, I got three perfect panels in gold. Thank you very much Eurocircuits! As you can see from the photos, the quality of the panels is just amazing.
This panels use the Eurocircuits registration system. This is a own set of rules for the registration holes around of the panel. Using these registration holes, I can easily align the stencil and the board on a special tool they produce. I will tell more about that in one of the next parts of the series “How to design a cheap plant watering sensor” (Read Part 1, 2, 3, 4, 5)
If you have questions, miss some information or just have any feedback, feel free to add a comment below.