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Forum Index : Microcontroller and PC projects : Building The Silicon Chip kit

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Herry

Senior Member

Joined: 31/05/2014
Location: Australia
Posts: 261
Posted: 07:30pm 16 Aug 2020
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1 When testing for 180 mA or thereabouts, I got 196 mA so within 10% which I assumed OK
2 I found I had to carefully drill out the LED front panel holes to 4mm (the twin LED module protrudes slightly from the motherboard).
3 Re mounting to the case using 3mm screws and spacers (per the SC article), I used my old CMM (1) case and used the self-tappers. Fitted perfectly.
4 I found it useful to file a light chamfer at the bottom ends of the front panel to aid in slotting it in just after the back panel started..
5 I only just finished the hardware yesterday, so after work I’ll get on further. I am wondering if in the Silicon Chip version of the kit all the firmware is already loaded on the various chips, so I won’t need that part.
Senior?!  Whatever it says, I'm a complete and utter beginner...
 
Womble

Senior Member

Joined: 09/07/2020
Location: United Kingdom
Posts: 267
Posted: 08:33pm 16 Aug 2020
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  Herry said  I only just finished the hardware yesterday, so after work I’ll get on further. I am wondering if in the Silicon Chip version of the kit all the firmware is already loaded on the various chips, so I won’t need that part.

My kit was the v3 pcb kit from micromite.org in the UK and did not come with a Waveshare board.  I therefore had to flash the initial firmware, and also update the software on the MCP2221A.  This was very straight forward using the instructions contained in the Construction Pack which can be downloaded from Geoff's website, details can also be found in the CMM2 User Guide located at the same website.  I initially flashed the Waveshare before installing it onto the CMM2 board as I had a suitable cable handy.

You should have no problems from a Windows machine.  If you do experience problems with your build, one of the first things to check is the voltges present between the USB-B case (-ve) and the 5VIN and 3.3V pins (+ve) on the Waveshare.  If they appear out of spec it is worth trying a different USB-A to USB-B cable.  Solved many problems with the keyboard and audio for me.

Welcome to the community, and have fun coding on this excellent machine.

Regards

Womble
Edited 2020-08-17 06:35 by Womble
 
Herry

Senior Member

Joined: 31/05/2014
Location: Australia
Posts: 261
Posted: 09:30pm 16 Aug 2020
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  Herry said  1 When testing for 180 mA or thereabouts, I got 196 mA so within 10% which I assumed OK
2 I found I had to carefully drill out the LED front panel holes to 4mm (the twin LED module protrudes slightly from the motherboard).
3 Re mounting to the case using 3mm screws and spacers (per the SC article), I used my old CMM (1) case and used the self-tappers. Fitted perfectly.
4 I found it useful to file a light chamfer at the bottom ends of the front panel to aid in slotting it in just after the back panel started..
5 I only just finished the hardware yesterday, so after work I’ll get on further. I am wondering if in the Silicon Chip version of the kit all the firmware is already loaded on the various chips, so I won’t need that part.


Fired it up after work this morning, and Bingo. Worked immediately! So the the answers to Nos 1 and 5 are positive!
Senior?!  Whatever it says, I'm a complete and utter beginner...
 
Womble

Senior Member

Joined: 09/07/2020
Location: United Kingdom
Posts: 267
Posted: 09:50pm 16 Aug 2020
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Excellent Herry, have fun  
 
Herry

Senior Member

Joined: 31/05/2014
Location: Australia
Posts: 261
Posted: 11:07pm 16 Aug 2020
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  Herry said  
3 Re mounting to the case using 3mm screws and spacers (per the SC article), I used my old CMM (1) case and used the self-tappers. Fitted perfectly.

I was wrong about the self tappers. They went in OK when experimentally mounting the board without the end panels. But when I put these on of course the board did not stand flush. So I am relying on the panels only as there will be little force once the plugs are in, and the spacers are fiddly plus the 3mm bolts did not go in the old CMM1 case.
Senior?!  Whatever it says, I'm a complete and utter beginner...
 
Womble

Senior Member

Joined: 09/07/2020
Location: United Kingdom
Posts: 267
Posted: 12:16am 17 Aug 2020
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You might find this interesting:
3D printed case
apparently the spacers are 5mm
 
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