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matherp
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Joined: 11/12/2012
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Posted: 06:14pm 26 Apr 2023

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Here are the completed boards as received from JLC. Both the filter and DAC versions work perfectly for all functions with no errors.
If any one is interested I can post the gerbers and design files

Edited 2023-04-27 04:20 by matherp

Mixtel90

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Posted: 06:30pm 26 Apr 2023

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Very neat indeed. :)

Mick

Zilog Inside! nascom.info for Nascom & Gemini
Preliminary MMBasic docs & my PCB designs

JohnS
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Posted: 06:47pm 26 Apr 2023

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Yes please.

Er... why is one V1.0 & the other V1.1?

I'm guessing the files would be for V1.1 - right?

John

matherp
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Posted: 06:52pm 26 Apr 2023

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Quote why is one V1.0 & the other V1.1?

V1.0 has Volhout's inductor filter
V1.1 uses the MCP4822 DAC

I will make both sets available - not much cost difference. The DAC has better high frequency response but uses a bit more system resouerce

stanleyella

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Posted: 10:00pm 26 Apr 2023

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a good price? https://www.aliexpress.com/item/1005005344791603.html?

Volhout
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Posted: 06:57am 27 Apr 2023

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Yes, a very good price...

If you where to order 100.000 pieces you would get the price down to 10 dollar. But for a qty of 5 it is higher.

Economics work that way...

PicomiteVGA PETSCII ROBOTS

Mixtel90

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Posted: 06:57am 27 Apr 2023

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Nice, but it's not the same thing at all.
Edited 2023-04-27 16:59 by Mixtel90

Mick

Zilog Inside! nascom.info for Nascom & Gemini
Preliminary MMBasic docs & my PCB designs

Volhout
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Posted: 07:09am 27 Apr 2023

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Cmm1 was 60 dollar
Cmm2 was 100 dollar
PM vga is 30 dollar (gbp 25)

Good price
Edited 2023-04-27 18:01 by Volhout

PicomiteVGA PETSCII ROBOTS

matherp
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Posted: 07:59am 27 Apr 2023

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All design files/gerbers etc. now uploaded to https://github.com/UKTailwind/PicoMite-VGA-Edition

JohnS
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Posted: 03:45pm 27 Apr 2023

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matherp said All design files/gerbers etc. now uploaded to https://github.com/UKTailwind/PicoMite-VGA-Edition

Thanks.

I'm trying to order the V1.1.

After uploading the gerbers, then BOM & CPL, on processing BOM & CPL I get some errors (in red):

1 parts inventory shortfall, which I guess means they don't have them LOL
looks ike it means the J1,J2; shows 8 shortfall (of 10)

3 parts not selected
which are:
BT1
USB2
H1

Am I doing this right / what do I do next?

John

matherp
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Posted: 05:43pm 27 Apr 2023

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J1 and j2 are the 20 pin headers and you don't want these from them - too expensive as hand soldered.

You also don't want H1 which is the 5-pin header

The rest should be there. let me check the BOM and see what has happened

matherp
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Posted: 06:02pm 27 Apr 2023

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UPDATE

Seems like a glitch on their system as it is doing the same to the file I had the prototype built from.

Recommendations

edit the BOM and CPL files. Remove the lines for J1, J2, and H1

Then load up as before

In the JLC screen for the two "missing" components hit the search icon on the component line.
The battery holder comes up with the correct part so select it
The USB connector cones up with a selection of parts select the top one:
KH-TYPE-C-16P

The proceed to the board viewer - it all looks OK to me.

JohnS
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Posted: 12:19pm 28 Apr 2023

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Thanks. I'll have a go at the weekend.

John

JohnS
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Posted: 01:49pm 30 Apr 2023

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matherp said edit the BOM and CPL files. Remove the lines for J1, J2, and H1

Then load up as before

In the JLC screen for the two "missing" components hit the search icon on the component line.
The battery holder comes up with the correct part so select it
The USB connector cones up with a selection of parts select the top one:
KH-TYPE-C-16P

The proceed to the board viewer - it all looks OK to me.

That worked - thanks!

I just got an email from JLC saying "Approved".

Sorry to ask but I suppose when the boards arrive I need to fit the now-missing J1, J2 & H1, but I'm not sure what they are. Pins or receptacles (headers?)?

rows of 1 or 2?

I have various so may well have them.

Er... will the holes to put them in be there or not and/or full of solder?

John

Mixtel90

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Posted: 01:55pm 30 Apr 2023

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The holes are done from the drill file, so they will be there - and not full of solder. :)

You don't need H1 at all. You only need J1 and J2 if you want to use an expansion module. The boards will run fine without.

Mick

Zilog Inside! nascom.info for Nascom & Gemini
Preliminary MMBasic docs & my PCB designs

JohnS
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Posted: 03:18pm 30 Apr 2023

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Thanks!

John

George H
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Joined: 03/07/2020
Location: United States
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Posted: 01:53am 01 May 2023

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Just ordered 5 of the V1.0. I edited the BOM and CPL files as Peter suggested, and the order went through no problem. I didn't have to search on those other parts so the glitch must be gone.

Total came to $85 shipped to the US or $17 per board. Very good deal IMHO. I did have a coupon for being a new customer that knocked $10 off the order.

Pretty inexpensive fun, per board. Thanks Peter, and all!

-G

matherp
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Posted: 07:46am 01 May 2023

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One note for configuring the boards.
The underside has silkscreen details for setting up the required options. However, both the boards use GP23 for audio and V1.1 also uses GP24. In order to configure this they need setting to OFF before executing the option command.

i.e.
for V1.0
SETPIN GP23,OFF:OPTION AUDIO GP22, GP23

for V1.1
SETPIN GP23,OFF: SETPIN GP24,OFF: OPTION AUDIO SPI GP24, GP22, GP23

Volhout
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Posted: 08:10am 01 May 2023

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@Peter,

Do these boards run CPUSPEED 378000 ?

Volhout

PicomiteVGA PETSCII ROBOTS

matherp
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Posted: 08:28am 01 May 2023

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Quote Do these boards run CPUSPEED 378000 ?

Mine do but no guarantees any more than any other RP2040 variant

Edited 2023-05-01 18:30 by matherp

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