easy, cheap, swappable clip harnesses!


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2 years 11 months ago - 2 years 11 months ago #3592 by reverendalc
if anybody (like me) gets tired of fussing with connecting the SOIC clip or the EZflash, check this out:



it costs less than $5.

arduino stackable headers
5" female-female leads
super glue

assemble the pins on the headers, and super glue them together. assemble the pins on the ezflash and super glue them together (not to the ezflash tho)

do this for the ez flash, and for the SOIC clip

never count pins again!



have a friend with a 3d printer?



VNC into rbp over wifi and dump to samba share. handy reminders on the wallpaper. this is NOOB proof

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Last edit: 2 years 11 months ago by reverendalc.

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2 years 11 months ago #3601 by CygnusX1
Very nice. I especially like the screen! I use these headers for my Raspberry Pi 3 . They are similar to your setup.

If I helped you buy me a latte!

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2 years 11 months ago #3603 by reverendalc
i wanted to do a full 40pin, but it's way too hard to swap out. i wish i could be confident with longer leads, i would make a molex so that one end could remain attached to the RBP, and i could just swap the connectors mid-cable.

do you know if it's safe to have 10" cables?

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2 years 11 months ago #3605 by CygnusX1

reverendalc wrote: i wanted to do a full 40pin, but it's way too hard to swap out. i wish i could be confident with longer leads, i would make a molex so that one end could remain attached to the RBP, and i could just swap the connectors mid-cable.

do you know if it's safe to have 10" cables?


I guess you could try it. Check the voltage at the end of the cable run for any loss of voltage. Also be sure to have a good power supply.

If I helped you buy me a latte!

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2 years 11 months ago #3606 by reverendalc
what gauge wire is the community recommending?

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2 years 11 months ago #3639 by thaGH05T
I have not used anything other than the f to f wires, there is a loss in signal after 10cm which can cause failures. You may be able to combat this with a decent power supply and heavier gauge wires though? Give it a shot and let us know the results. You can even try some premade ribbon cables with the GPIO adapters.

Keep this up and I will be joining in to test with you. :)

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2 years 11 months ago #3644 by reverendalc
my original plan was popping them on and off the GPIO on the rbp, but popping on and off a 40pin plug is far more difficult than i want it to be. that, coupled with how the GPIO pins are recessed in my case, made it impossible without breaking something.

the smaller plug is manageable, but still difficult. i'll head back to the parts store and try a cable connect. i'd like to find a 5x2 header if possible. i tried to trim down the 10pins, but i'll need a hot-knife or something to do it cleanly without damaging the remaining sockets. ultimately, it'd be great to have the header just big enough, and find a way to cap off the remaining GPIO pins so the cable could be connected by feel without counting pins

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2 years 11 months ago #3646 by thaGH05T
Why not use the same concept with bullet connectors or similar?

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2 years 11 months ago #3647 by reverendalc
i'm looking for something molex style, with the six terminals on one plug

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2 years 11 months ago #3669 by reverendalc
man, i bought a 9pin ribbon, some molex plugs... everything was going great until i busted out the 40pin UDMA IDC.

there is a row of pins in the middle! how the heck do i know which goes where? that's insane!

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2 years 11 months ago - 2 years 11 months ago #3734 by KingBonecrusher
Here is another solution... :P
HARDWARE
















Last edit: 2 years 11 months ago by KingBonecrusher.

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2 years 11 months ago #3735 by CygnusX1
@KingBonecrusher very nice setup!

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2 years 11 months ago - 2 years 11 months ago #3736 by KingBonecrusher
SOFTWARE













Everything is custom made, even the Software ;-) The LCD has 7 new Symbols (not stored factory side), which is connected trough soldered I2C Chip.
Last edit: 2 years 11 months ago by KingBonecrusher.

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2 years 11 months ago #3737 by zenelli
Very nice indeed but are the cables not too long for a good read?

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2 years 11 months ago - 2 years 11 months ago #3740 by reverendalc
Dang. I'm currently working on an interchangeable wire setup almost exactly like that.

I bought a 9wire ribbon (and pulled one wire off)
40pin plug
8pin molex plug for swapping between ezflash and SOIC
Two 4pin plugs for the SOIC clip
One 8pin plug for the ezflash

Hopefully I'll wrap it up this weekend
It looks pretty clean.
Last edit: 2 years 11 months ago by reverendalc.

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2 years 11 months ago #3744 by thaGH05T
@kingbonecrusher, I like the setup you have and the program you have written. Is this something you are going to leave open source? You should be working with me on some projects if so.

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2 years 11 months ago #3751 by KingBonecrusher

zenelli wrote: Very nice indeed but are the cables not too long for a good read?


No, that is Ok. Look at the read/write/erase test picture. At least it does 12x rounds and no problems. I` am testing my cables with this little script.

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2 years 11 months ago #3752 by KingBonecrusher

reverendalc wrote: Dang. I'm currently working on an interchangeable wire setup almost exactly like that.

I bought a 9wire ribbon (and pulled one wire off)
40pin plug
8pin molex plug for swapping between ezflash and SOIC
Two 4pin plugs for the SOIC clip
One 8pin plug for the ezflash

Hopefully I'll wrap it up this weekend
It looks pretty clean.


Why not use Dupont plugs and Cables? Works great for me.

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2 years 11 months ago #3753 by KingBonecrusher

thaGH05T wrote: @kingbonecrusher, I like the setup you have and the program you have written. Is this something you are going to leave open source? You should be working with me on some projects if so.


The base for this flash pie is my small debian, i think you can remember. The LCD is driven by systemd self written python service during freely python library with some modifications. And the frontend is just a wrapper script around flashrom. So nothing special....

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2 years 11 months ago #3758 by reverendalc

KingBonecrusher wrote:
Why not use Dupont plugs and Cables? Works great for me.


i currently have one with those, and it works nicely. i am liking the ribbon though, it looks more OEM. i'm not sure how it's going to end up, but time will tell. counting pins on the 40pin is nuts, the crimp pattern is complex, and i'm lazy

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