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#electronics

21 posts21 participants1 post today
Public
Dr David Mills

Hey you!
Yes you. Have you checked the batteries in the thing you haven't used for a while? No? Do it now, or as soon as possible.

This toot brought to you by a bunch of leaking Duracell and Poundshop Kodak batteries in some kit I was going to take to work today.

#battery#electronics
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Gareth Halfacree

Now that April Fool's morning is well and truly over, I'm pleased to confirm that @rc2014 isn't pulling your leg - well, not about the existence of the #RC2014 Mini II Picasso, at least.

oldbytes.space/@rc2014/1142615

How do I know? Here's my hands-on review of the thing. Spoiler: it's *lovely*.

hackster.io/news/science-art-a

Close up of a corner of a yellow PCB. Amongst the squirly tracks is the RC2014 logo. A comically large red LED and green resistor are visible, along with a spiral resistor staircase . The chips are arranged at an angle that it looks like they are thrown there at random rather than being arranged. One has even fallen through the PCB.
OldBytes Space - MastodonRC2014 (@rc2014@oldbytes.space)Attached: 4 images I read a report recently that confirmed that straight PCB traces, right angle, and orthogonally placed components can actually make electrons sad and slow them down. They much prefer the excitement of whizzing along curvy traces, particularly if they end up going in to a chip at a random angle. And bright colours really make them want to work harder. So I will be updating all #RC2014 kits with design philosophy. The first to be done is the RC2014 Mini II Picasso. You can pick one up now at #z80kits https://z80kits.com/shop/rc2014-mini-ii-picasso/
#VintageComputing#RetroComputing#Electronics
Replied in thread
Public
Memecosystem Services

First finished (??!) print!! Paper made from linen and ryegrass with some sphagnum inclusions. Cyanotype print is made from historical pamphlets, maps and images concerning postwar Irish agriculture. The print was then toned by soaking in water from a bog in Lixnaw in North Kerry. Finally, a clover is embroidered along the line of a gas pipeline map on the print with conductive thread, allowing the print to be a touch sensor for electronics. #papermaking #cyanotype #electronics #EnvHist

A blue-green cyanotype on rough paper with ragged edges lying on a wooden floor. A silver thread is embroidered through the paper in the shape of an abstracted clover, the thread continuing off the page.
Public
Bornach

Making a DIY #Eurorack case from 3M screw rails, MFOS bipolar power supply, and scrap wood I found in this house I moved into last year. This is mainly a project for getting more practise using power tools. I lived in small rental accommodation nearly all my life so had little reason to own any until now.

Which way should I orient it? Power entering from lower right or from the upper left?
#synthdiy #synth #electronics

Empty Eurorack case 84hp 3u made from bought rails, roughly cut chipboard, recycled wood with several holes. A soldered Music From Outer Space power supply PCB with large capacitors is mounted in the lower right corner.
Empty Eurorack case 84hp 3u made from bought rails, roughly cut chipboard, recycled wood with several holes. A soldered Music From Outer Space power supply PCB with large capacitors is mounted upside down in the upper left corner.
Public
ely

Dear fediverse,

what is the best resource of do's and dont's for setting up a #repaircafe ?

I guess not what I do with my own repairs : 40 boxes with half broken stuff from other people, waiting to find that single crucial part, schematic, or plans to fix it with a 3d printed part (to be designed and printed), actually converting my place in a #dumpsterdive without divers.

Neither desoldering all weird parts because weird parts are difficult to get...

#electronics #ewaste (...)

Public
root42

Question to all the #ee or #electronics experts here: I have two TI chips here. the one in the background is from 1985 and has shiny legs. The one in the foreground I bought in the last 5 years new from Mouser. It came with those tarnished legs already from the factory. Why are the legs so tarnished? What coating does TI use that makes it so black looking. I understand that back in the 70s supposedly TI used a silver coating that turned black over the decades, but this is something different...?

Two chips, one DIP16 packaged SN74LS166 and one DIP20 packaged SN74LS245. The latter has tarnished pins, while the other looks shiny.
Public
doragasu

People doing #Electronics here, I am still searching for a substitute for the LCMXO256C #CPLD. Up to 2019, you could buy these below 2€ a piece on Digikey. They have 256 cells and 78 IO pins, making them quite interesting for that price range. During the pandemic their price raised wildly and now they are 10€ a piece, so I have been searching for a cheaper alternative without success. Any recommendations?

Public
Zack Weinberg

#Electronics repair Fedi, anyone got any suggestions for troubleshooting this kind of pushbutton? The device is a first-gen Kindle Touch and it has become unresponsive to both of the two wake-up buttons (front and bottom) It still takes a charge and will talk to a computer over USB so I think it's not a software or main board failure.

Both buttons are on the same daughter circuit board (pictured) and I can feel them both go click when pushed. I can't get at where the daughter board connects up without taking the device farther apart.

Closeup on a round metallic pushbutton surface mounted to a ribbon-like circuit board near the bottom edge of the front face of some sort of flat gadget. The ribbon wraps around the bottom edge and disappears below. Another, smaller button of similar design is just visible on the edge part of the ribbon.
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