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1. Foone🏳️‍⚧️ (foone@digipres.club)'s status on Sunday, 04-Aug-2024 11:44:44 JST Foone🏳️‍⚧️

   So I have a PCB which has a QFP-64 mcu on it that I can't reprogram. So I'm going to remove it, and drive the LCD display pins directly.
   Does anyone know an easy way to do this? Either a flat flex cable with the right pitch so I can solder one end to the qfp-64 footprint, or some kind of reverse Qfp64 breakout?

   • Foone🏳️‍⚧️ (foone@digipres.club)'s status on Sunday, 04-Aug-2024 11:56:50 JST Foone🏳️‍⚧️

     in reply to

     • 10,000 lb weighted blanket

     @violator yeah that's my backup idea. I'd just love to avoid having to do something like 30 wires manually

   • 10,000 lb weighted blanket (violator@mathstodon.xyz)'s status on Sunday, 04-Aug-2024 11:56:51 JST 10,000 lb weighted blanket

     in reply to

     @foone my go-to would be to solder magnet wire to each pad of interest, especially if the LCD interface doesn't consume the full 64 pin pinout

   • Foone🏳️‍⚧️ (foone@digipres.club)'s status on Sunday, 04-Aug-2024 12:04:34 JST Foone🏳️‍⚧️

     in reply to

     • 10,000 lb weighted blanket

     @violator that's actually what I'm trying to do here! I'm connecting to the microcontroller footprint because it's easier than attaching to the elastomeric connector

   • 10,000 lb weighted blanket (violator@mathstodon.xyz)'s status on Sunday, 04-Aug-2024 12:04:35 JST 10,000 lb weighted blanket

     in reply to

     @foone have you ever used a z-axis elastomer? They're very handy, particularly when constructing custom test sockets. It would not be a permanent solution (I assume), but would allow for testing as to whether the pitch of your ribbon cable is correct

   • abrasive (abrasive@digipres.club)'s status on Sunday, 04-Aug-2024 13:22:26 JST abrasive

     in reply to

     @foone could you use a zebra strip and mush an 0.5mm pitch FFC down on it? though that's probably harder than directly soldering an FFC to the QFP pads

   • Foone🏳️‍⚧️ (foone@digipres.club)'s status on Monday, 05-Aug-2024 06:22:37 JST Foone🏳️‍⚧️

     in reply to

     okay these are approximately .4mm pitch. that is not going to be fun to solder. so I'm not gonna. I'm going to have to take a different approach

   • Foone🏳️‍⚧️ (foone@digipres.club)'s status on Monday, 05-Aug-2024 06:31:34 JST Foone🏳️‍⚧️

     in reply to

     This is the PCB I want to modify.

     Soldering to the chip's pads is going to be too much of a pain, so either I'm gonna try to solder onto those small test pads on the bottom, or I just make my own PCB with pads in the same places.

   • abrasive (abrasive@digipres.club)'s status on Monday, 05-Aug-2024 07:34:24 JST abrasive

     in reply to

     @foone I don't suppose that's a 1mm pitch on that thar LCD connector? if the LCD frame is friendly you could stick a 1mm FFC under there and poke the other end into a breakout eg. https://www.aliexpress.com/item/1005005319261974.html

   • Foone🏳️‍⚧️ (foone@digipres.club)'s status on Monday, 05-Aug-2024 07:52:08 JST Foone🏳️‍⚧️

     in reply to

     • abrasive

     @abrasive good idea. I'll look into that. thanks!

   • Foone🏳️‍⚧️ (foone@digipres.club)'s status on Monday, 05-Aug-2024 08:43:40 JST Foone🏳️‍⚧️

     in reply to

     • illegally Rylie 🏳️‍⚧️✨

     @Specialist_Being_677 yeah, no bluetooth in this one. it's just a wrist bloodpressure monitor

   • illegally Rylie 🏳️‍⚧️✨ (specialist_being_677@hachyderm.io)'s status on Monday, 05-Aug-2024 08:43:41 JST illegally Rylie 🏳️‍⚧️✨

     in reply to

     @foone ooh that's interesting. I usually only see that company on Bluetooth ICs (Bluetooth audio mostly) but I don't see an inverted F antenna on the PCB...

   • illegally Rylie 🏳️‍⚧️✨ (specialist_being_677@hachyderm.io)'s status on Monday, 05-Aug-2024 08:58:59 JST illegally Rylie 🏳️‍⚧️✨

     in reply to

     @foone oooh I bet there's a Bluetooth version of it though.

   • Foone🏳️‍⚧️ (foone@digipres.club)'s status on Monday, 05-Aug-2024 08:58:59 JST Foone🏳️‍⚧️

     in reply to

     • illegally Rylie 🏳️‍⚧️✨

     @Specialist_Being_677 oh I'm sure.