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Showing content from https://github.com/Stefan-Olt/MISRC/wiki/Fabrication below:

Fabrication · Stefan-Olt/MISRC Wiki · GitHub

The MISRC is a 2 sided, 2 layer PCB with a dedicated set of headers for a data interface sub-board (either FX3 USB 3.0 dev board or Tang Nano 20k Currently)

Thanks to assembly services today you can have almost any PCB fabricated!

Total Cost: 250-330USD(Relative to region & shipping)

Tip

You can also directly order pre-made MISRC V1.5a boards here which can be drastically cheeper for USA orders.

Tip

Right-click --> open in new tab to view full image files.

Firstly acquire the 3 pre-made products, that enable the MISRC to function.

• Tang Nano to FX3 Header Adaptor
• Tang Nano 20k
• MS2130 USB 3.0 - Order Link 1 / Order Link 2

Go to PCBway Shared Project

Select PCB+Assembly

Caution

Configure options as listed below in the images/text.

• Turnkey
• Single Pieces
• Both Sides
• 1
• No
• Yes

• Solder Mask - Blue
• Silkscreen - White
• Surface finish - HSL with lead or Immersion Gold ENIG
• Via Process - Plugged with Solder Mask
• Remove Product No - Specify a location

Caution

Notice how "Components cost is 0.00 USD" this is due to parts always being quoted after the order is inspected for production.

With any board order, you will have to manually confirm a few things via email after placing your order, the PCB is fabricated, parts cost is quoted then you can alter or proceed with population.

You will most likely see a confirmation email about vias in the pads.

• The vias (overall) should just be covered/filled with soldermask (tented vias).
• The vias (in pads) should just be not filled or plugged via resin. (the cheapest option)

Note

• The vias in the pads are there on purpose:
• There is a bottom pad on the voltage regulator, for hand soldering the vias are necessary to solder that pad, it's there for thermal reasons.

Flash your Tang Nano 20k, then add it to your MISRC PCB.

(Note add 1-2-3 step images)

As the board is built around 0805 standard size parts most people with a steady handy can hand solder these parts with a Bevel tip and a pair of tweezers.

Step 1:

Clean your PCB with 99.9% IPA, this cleans any surface contaminate off.

Step 2:

Prepare your Flux, Solder 60/40 & Components

Step 3:

You can use solder paste if you have a solder stencil made or manually populate each pad.

Or bare solder via coating the PCB with flux, with a clean and tinned tip populate 1 side of the pad then move the component with tweezers into the pad while melted via iron then simply flow a small amount of solder onto the other pad.

Step 4:

You will want to populate 2.54mm header pins last, and BNCs last as these are the hardest to de-solder and headers easiest to melt and very easy to damage pads without a de-soldering gun.

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