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#pcb

6 posts6 participants1 post today
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tjhowse

I'm working on the code and PCB for the ATTiny10 in my v2 forever blinker.

I have 1kB of flash, 32B of ram, and zero EEPROM. It's a fun optimisation challenge to see how long a message I can cram in to such a small amount of storage, along with the code required to display it.

I need to decide whether I need an external EEPROM before I order the PCBs. Hmmmm.

youtu.be/WjmHiqDalkw

YouTubeIncredibly small programing - Blinker v2 message storageBy Travis Howse
#electronics#pcb#kicad
tjhowse

❤️ #kicad ❤️

After a good five minutes trying to work out why these traces weren't using the net width I finally noticed this helpful readout at the bottom that tells you the width of the trace and the rule that set that width. Very nice touch.

#pcb
dorotaC

So I visited someone who used to work at a hospital in the '90s and I got this hand-made #vintage #pcb .

The writing is
Coronametrics Front End/Ultrasound
the other side has 02/83 , could be a year.

No solder mask, traces at weird angles, no clear grid, rusty screw.

What computer would it slot into?

There's more in the basement it came from if anyone's interested :P I even saw one with a bunch of DIP ICs.

#electronics#computers
tjhowse

My PCBs arrived! I ordered 20 and I got 33? Weird. It's like they had some spare space on a panel and just scattered a few around at random?

These are breakout boards for the little ESP32-containing modules I use for various projects. I got tired of mounting them on veroboard. You can buy very similar breakout boards from the manufacturer, but these are simpler and cheaper.

#pcbway#pcb#electronics
Continued thread
Piotr Esden-Tempski

SQUEEEEEZE number 2. I ended up upgrading the PCB design rules to allow for smaller plugged via and using the 0.1mm trace/space rules. The latter is the default offered by JLCPCB these days which blows my mind! The via in pad stuff does not add very much to the overall PCB price when made in quantity anyways. And I can now kick the can of dealing with 0201 down the road a bit longer. (I mainly dread tuning the stencil apertures, the rest is not really an issue.) #kicad #pcb #electronics

C.

#Confession time...

I spent ten minutes wondering why I was having such trouble cutting a trace on one of my custom protoboard PCBs - was my knife too dull? Was there something wrong with the board I'm using? Is it connected somewhere that I'm forgetting about?

I looked at everything multiple times, probing and getting the BEEEEEP of the continuity mode on my meter.

And then realized the trace *was* successfully severed, it's just it was jumped by a resistor that was only 11 ohms, which is under the threshold my meter considers "continuous". 🙄

#continuity#test#multimeter
STM32World

STM32 Unboxing #1 - JLCPCB Goody Bag

My first (!!! - and possibly last) unboxing video - didn't go particularly well. Recorded on my phone on my balcony - audio is pretty horrible and for some unknown reason out of sync. Anyway - the box was full of Goodies from JLCPCB (described in last video). PCB's ordered last Monday and I had them today - exactly 1 week later.

#STM32 #Gettingstarted #Tutorial #KiCAD #PCB #JLCPCB #stm32world

youtube.com/watch?v=HcljxWxlYGA

YouTubeSTM32 Unboxing #1 - JLCPCB Goody BagBy STM32World
Kris\Slyka

ok, copper tape glass PCB test results are in. just did a small test layout with some traces and test footprints. exposure and development of the etch resist went well. 7.5 minutes under my UV box and development in water with a random amount of sodium carbonate in it.

etching went… less than well. The glue on the tape does not seem to stand up to the copper chloride etchant very well and there was severe under etch all around the edges and a whole bunch of delamination. might have to try a different way of attaching copper foil. one option might be to just use the same material as the etch resist as glue…

oh yeah, and even though the glue was kinda destroyed by the etchant there is still a layer of glue on all the bare glass spots :I

#electronics#diypcb#pcb
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