My Version of the BrewPi Spark

In keeping with my liking for recycling old Instrument cases, I decided that I would build my own  version of The BrewPi spark. Elco’s product , the BrewPi Spark,  in it’s very compact and very nicely engineered Case.  I don’t want to undermine the vast effort that Elco has put  into  his current product but It just didn’t sit right with the DIY person in me. I also wanted some thing that Fit in with my current BrewPi. So I set about designing my own version of the Spark shield which turned out to be compatible with the BrewPi Spark version 2.0  which uses the Photon.

I used Eagle CAD to layout my shield. I have made my files available.

schematic
schematic
Board layout with no go zone...
Board layout with no go zone…

and used EuroCurcuits in Belgium to make a couple of nice PCB’s

3 for the price of 2
3 for the price of 2

My aim was to be able to hand solder all the components and this is just do-able, yes I used a couple of surface mount devices but with care and a fine pointed solder tip it can be done.

Partially completed board
Partially completed board

I made one or two mistakes and had to destroy some right angled connectors, ….they should have been inline so they would fit inside my chosen case..IMG_0478

Building the PCB was quite straight forward and I chose to get a 12v PSU and a 12v to 5v regulator board.IMG_0287

The project stalled a while due to work and Illness but on the run upto Christmas I managed to get the case assembled. The 25A SSR’s fastened on the side panels, which should suffice as heat sinks.

Internals
Internals

I manually fabricated the rear panel but got a laser cut front panel. The rear panel hosts 4 IEC in and outs  relying on the fuse in the IEC feed cable for protection. The Front panel which in retrospect I’m not too sure of the Blue colour was laser cut at my workplace, my Thanks to Andy in the TSS team in The Electronics Dept.

Back panel
Back panel
IMG_0172
Front panel
IMG_0470
A bit ugly but the Raspberry Pi has power and USB data connections through Holes the Lid

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