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Forum Index : Microcontroller and PC projects : RT2040 - My version of the WS Zero module....
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Grogster Admin Group  Joined: 31/12/2012 Location: New ZealandPosts: 9726 |
Hello everyone.  Following on from my other thread about Watchdog problems when using the WS Zero module and the PM firmware, I hereby show-off my version of this module. The footprint is exactly the same, but the I/O numbers are different. This new design is based on the classic MM2 chip, that being the PIC32MX170F256B, and is programmed and used in exactly the same way. Certain I/O pins on the 170, needed to be on certain pins on the footprint, which is why the pin numbers are a bit all over the place. This board is 4-layer. Not possible to do on two layer with the size restriction. See my other thread for reasons as to why this came about. I will be getting a few of these made, so if anyone is interested....     Smoke makes things work. When the smoke gets out, it stops! |
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Mixtel90 Guru  Joined: 05/10/2019 Location: United KingdomPosts: 8232 |
That's very, very neat! I've only tried designing with 4 layers a couple of times. I got a price on one of them and nearly fell over so I didn't bother after that. lol Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| Grogster Admin Group Joined: 31/12/2012 Location: New ZealandPosts: 9726 |
The price on 4-layer is very cheap now. Not what it used to be. I'll look it up tomorrow, but it was so insignificant, I never even questioned it as part of the order. Smoke makes things work. When the smoke gets out, it stops! |
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| Grogster Admin Group Joined: 31/12/2012 Location: New ZealandPosts: 9726 |
Just for the thread's information, 10pcs of this 4-layer PCB was US$7.20, so 72c per board - VERY cheap. Naturally, gets more expensive the bigger the board, but the CMM2G2v2 board is 4-layer, and 10pc of that size in 4-layer is still only US$37.60 last time I ordered some(August 2025), so only US$3.76 per 4-layer PCB. This is just the PCB, not counting any of the components on the CMM2G2v2, but it just lets you see how cheap 4-layer has become. I agree - 4-layer DID used to be startlingly expensive, but it isn't now. Even moderately large sized PCB's are very cheap. It's the 6-layer and 8-layer PCB's that are now hideously expensive.  Smoke makes things work. When the smoke gets out, it stops! |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 8232 |
Thanks :) I might have another look at 4-layer now. A bit late for my current project though. Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| Grogster Admin Group Joined: 31/12/2012 Location: New ZealandPosts: 9726 |
Programmer/Tester PCB:  Smoke makes things work. When the smoke gets out, it stops! |
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