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Phil23
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Joined: 27/03/2016
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Posted: 11:23am 29 Mar 2017

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WhiteWizzard said It would be interesting to know what distance can be obtained between the MMX and TFT connectors whilst still retaining a perfect image (and also accurate response to touch).

I was using a 6" (150cm) ribbon cable on a 4.3" SSD and it all worked perfectly.

I've used a 300mm IDE cable on an E64. Worked fine except when I had issues with the breadboard & DuPont connectors.

On the topic of cables, does anyone recall these; just had a ferret about to find one.

They were a higher spec IDE cable with 80 conductors instead of 40, but still 40 pin.
Maybe they would be more suitable than the standard ide.

Don't recall how the 80 cores were wired, but someone might know.

Not also it has a key pin, would need to drill a hole to accommodate it.

Thoughts?

Phil.

Edit:-

Bit more info... Edited by Phil23 2017-03-30

TassyJim

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Joined: 07/08/2011
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Posted: 11:59am 29 Mar 2017

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The 80 core cable would only work if the IDE ground pins were the same as the TFT ground pins.
Stick to the 40 way cables!
Some of the 40 way cables have the centre pin blocked of too but fortunately, most are OK

Jim

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Phil23
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Posts: 1667

Posted: 12:12pm 29 Mar 2017

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Just explored this a bit further & it seems like a bad idea.

Looks like the resulting cable would have all these pins tied together.

2,19,22,24,26,30,40.

Cables look like this.

Cheers

Phil

Phil23
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Posted: 12:13pm 29 Mar 2017

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TassyJim said The 80 core cable would only work if the IDE ground pins were the same as the TFT ground pins.
Stick to the 40 way cables!

Beat me to it Jim!

Intellecta
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Joined: 07/05/2016
Location: Australia
Posts: 22

Posted: 05:46pm 29 Mar 2017

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Dear Peter,
Thanks for update on the gerbers. I extracted the zip file and imported a layer into Diptrace. The tracks and pads are still showing errors. Where are the latest files have the errors reduced. I was going to send the 64pin to seeed pcb to do a trial run. The board has a good number of through hole components so students get a balance of soldering tasks.
Any info appreciated.
Tony Pugatschew

matherp
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Joined: 11/12/2012
Location: United Kingdom
Posts: 10066

Posted: 08:58pm 29 Mar 2017

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Tony

There are no new files as I still think they are correct. Please look at the files with GC-Preview and let me know where you think there is an error -post a picture. I've compared the files with the first set of boards which work fine and can't see a difference (the change was just a silkscreen difference)Edited by matherp 2017-03-31

panky

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Joined: 02/10/2012
Location: Australia
Posts: 1111

Posted: 04:30pm 23 Apr 2017

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Peter,

Received your MZ Extreme Backpack100-4.3v1.0 PCB (the black instrumentation one with both GPS and accelerometer) from WW today.

The schematic for this PCB on the first page of this post does not appear to equate to the board shown as I can not see any pinout info or reference to the GPS module.

Can you confirm that the schematic is correct please or if not, post an updated one?

Also, do you have a BOM for this board (even a rough list with part numbers would be helpfull) or any other documentation relating to this board?

Thanks again for the great contributions you have made to the uMite world.

Cheers,
Doug.

... almost all of the Maximites, the MicromMites, the MM Extremes, the ArmMites, the PicoMite and loving it!

WhiteWizzard
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Joined: 05/04/2013
Location: United Kingdom
Posts: 2927

Posted: 08:43pm 23 Apr 2017

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@Doug,

I think it best I let Peter M send it as I don't want to send an out-of-date version (assuming I have one). During the MMX development, there were many emails exchanged on a daily basis between Peter, Geoff and myself. From all these emails, I have many with attachments and I do not want to confuse you by sending an incorrect schematic. I am out today; however IF I do come across what I think is the correct one when I get back home then I will send it through!

By the way - you need to add MZ100 onto your ever-growing 'footer':

DonT SM1, Duinomite,CGCMM1, CGCMM2, 2xDimitech,
3xWW uMites, Micks MuP, Grogster 1A, 4xPeterM uM+, Zonker DIP-600, 3xCGuKits, CGuBoard2,SnadPic100,SilChip BP64 & Exp100,PM MMX144 .. and loving it!

matherp
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Joined: 11/12/2012
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Posts: 10066

Posted: 09:09pm 23 Apr 2017

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The GPS connection is marked H5 on the schematic

You must use a DIP oscillator as there is a wiring error on the first release of the PCB relating to the SMD oscillator footprint. The DIP oscillators are 5V, note the 270R/470R voltage divider on the output of the oscillator to drop the output for the PIC.

Non-standard parts
SD card 114-00841-68
Regulator LD1085D2M33R
L1 ELJNAR10MF
Reset switch FSMRA4JH
SMD USB 10118192-0001LFEdited by matherp 2017-04-25

panky

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Joined: 02/10/2012
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Posts: 1111

Posted: 02:02am 24 Apr 2017

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Thanks Peter- will let you know how it goes together☺☺

@WW - see the new list below☺☺

... almost all of the Maximites, the MicromMites, the MM Extremes, the ArmMites, the PicoMite and loving it!

matherp
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Joined: 11/12/2012
Location: United Kingdom
Posts: 10066

Posted: 04:11am 11 Aug 2017

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The originally posted 64-pin gerbers were corrupt - I believe these are now correct

2017-08-11_141014_backpack64MZ.zip

I think the corruption only related to the 64-pin circuit but please check any other gerbers carefully before having any PCBs fabricated

WhiteWizzard
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Joined: 05/04/2013
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Posts: 2927

Posted: 09:19pm 12 Aug 2017

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panky said @WW - see the new list below☺☺

So can I interest you in a PMMZ64 for your 'collection'!

Boppa
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Joined: 08/11/2016
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Posts: 814

Posted: 08:26am 13 Aug 2017

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harking back to the 80 wire data cables - They were used with high speed data harddrives, and (so the story went) had a ground wire connected between every data wire (ie every data wire had a ground wire on either side)
they were supposedly interchangeable with standard 40wire IDE cables, just had less chance of data corruption due to crosstalk between data lines....

bigmik

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Joined: 20/06/2011
Location: Australia
Posts: 2946

Posted: 11:12am 13 Aug 2017

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Hi Bob, all,

Boppa said harking back to the 80 wire data cables - They were used with high speed data harddrives, and (so the story went) had a ground wire connected between every data wire (ie every data wire had a ground wire on either side)

I often wondered about them, How did they get the GNDs to those wires when there was still only 40 pins on the sockets on the end of the cables?

I might pull one apart and see if it is a special connector or just a `con job'

Regards,

Mick

Mick's uMite Stuff can be found >>> HERE (Kindly hosted by Dontronics) <<<

TassyJim

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Joined: 07/08/2011
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Posts: 6219

Posted: 11:55am 13 Aug 2017

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bigmik said
I might pull one apart and see if it is a special connector or just a `con job'

Regards,

Mick

It's a bit too involved for use to make use of it as a 40 way cable. All the 'gnd' pins are interconnected along with the isolation wires.

Jim

VK7JH
MMedit

panky

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Joined: 02/10/2012
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Posts: 1111

Posted: 09:02pm 13 Aug 2017

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WhiteWizzard said

panky said @WW - see the new list below☺☺

So can I interest you in a PMMZ64 for your 'collection'!

Phil,

Can't see any details of Peter's MZ boards on your site - do you have populated and unpopulated price for the MZ64 board (the backpack one)?

Doug

... almost all of the Maximites, the MicromMites, the MM Extremes, the ArmMites, the PicoMite and loving it!

matherp
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Joined: 11/12/2012
Location: United Kingdom
Posts: 10066

Posted: 10:05am 28 Feb 2018

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I was asked to confirm gerbers for the 144-pin PCB were OK so I'm posting an update just to be sure

2018-02-28_200529_Backpack144.zip

Other MMX layouts are posted here Edited by matherp 2018-03-01

matherp
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Location: United Kingdom
Posts: 10066

Posted: 01:24pm 25 Mar 2018

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Graeme (OA47) has just had some boards made up to the MX144 V1.2 gerbers in the previous post and kindly sent me one. I moved the parts across from my original prototype and have fully tested the new layout. I'm happy to report that the V1.2 gerbers have no known errors in either the wiring or the silkscreening.

Note in the picture R37 and R38 are not installed. When using the through-hole 5V oscillator these make a potential divider on the output to reduce the signal to 3.3V for the PIC . I'm using the optional SMD 3.3V oscillator so these are not needed.

Links USBVBUS and USBID are made enabling a USB keyboard to be connected (Top right)

enzo1965

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Joined: 30/08/2018
Location: Italy
Posts: 2

Posted: 09:46am 30 Aug 2018

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Hi, for the Micromite eXtreme 144 I noticed that the 5 volts oscillator have a 24 MHz frequenzy, whereas the 3.3 volts have a 16 MHz frequenzy. I wanted to ask if the firmware is the same.

Have a link for schematics and bom for Micromite eXtreme 144, and the latest firmware for this board?

Thanks, best regards.

matherp
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Joined: 11/12/2012
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Posts: 10066

Posted: 10:35am 30 Aug 2018

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Quote 5 volts oscillator have a 24 MHz frequenzy, whereas the 3.3 volts have a 16 MHz frequenzy.

Oscillator is 24MHz in both cases - I needed a footprint for the SMD version and it happened to be a 16MHz version should be SG8002CAPCB24MHZ or equivalent.

No BOM other than schematic non-standard parts are:

Audio socket - 35RASMT4BHNTRX
SDcard socket - 114-00841-68
L1 ELJNAR10MF
Reset switch FSMRA4JH
SMD USB 10118192-0001LF

Latest software here Schematic below:

2018-08-30_203741_schematic.pdf

Edited by matherp 2018-08-31

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