/r/electronics
Discussion and news about component-level electronic circuits.
A subreddit dedicated to news, articles and general discussions related to the field of electronic engineering.
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The focal point of a submission must be component-level electronic engineering, design, news, and circuits (with at least one active element: a semiconductor or a vacuum tube/valve). See below for off-topic subjects.
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General pictures or videos related to component-level electronic engineering (See posting Rule #1).
Videos with commercial content or sponsorship/patronage requests are likely to be removed; repeat offenders may be banned from the sub. If in doubt, contact the mods before posting.
Electronic engineering-related posts that don't fall into any other category.
An electronic engineering-related news article or announcement.
Show us your (or someone else's) electronic circuit design and/or final build.
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To qualify as a project, the details available should allow someone else to make a copy.
NB: This is for original work - pictures of stock kit builds will be deleted.
A useful or insightful technical note on component selection, circuit design or testing etc. - something beyond 'stick decoupling caps everywhere'!
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Banner from original picture by Sergej Klammer (/u/zappadoing). Used with permission. Licence: CC-BY-SA*
/r/electronics
Open to anything, including discussions, complaints, and rants.
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I wanted to share a reminder that you don’t need a dedicated workbench, shop, or even a large table to work on electronics projects. I don’t have the space or budget for a full setup, so I work at my desk while watching videos. However, constantly running back and forth to grab parts was frustrating and made setup and cleanup take forever.
To solve this, I built a portable workbench that I can easily place on my desk or store on a shelf when not in use. Here’s what I did:
Now, I can set up and start working in seconds, and so far, it’s been a game-changer!
Just wanted to share my project that I recently finished. I think it's the biggest project so far where I designed the electronics circuit and PCB layout. I also created MCU firmware and PC application for debugging and controlling the robot.
The whole project is availiable on my github https://github.com/konrad1s/LineFollower-Kwark
You can also check demo on youtube https://www.youtube.com/watch?v=Kh0NfI-lTgYThe
if you have any questions, feel free to ask
Or this will happen. Deep cracks and partial delamination it is. Tried to clean old HPDL-1414 display with isopropyl alcohol. Thankfully I have 6 more to work with.
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I got bored and made a bench power supply to power my magic spinny and my blinkys.
I think this ceramic disk has gone bad, the dark line is much clearer in real life than in the photo too
Open to anything, including discussions, complaints, and rants.
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I got so fed up with the stupid interface on the front of my automatic cat feeders that I decided to make a web interface and use the ESP8266 to control them. They are very simple devices. Across two different brands of feeders I have they use the same internal mechanism, so this should work pretty universally across all generic-looking cat feeders...
I was going to design a custom PCB but the circuit is so simple it was pointless and would've taken weeks to arrive. I cut the original wiring harness and crimped on JST-XH connectors to make it look somewhat professional.
cat feeder from brand #1 wired to my board
cat feeder from brand #2 wired to my board
The prefboard I made (I made 3x of them)
You can check out the code and some more images of the feeders and board (front/back/etc) here:
Hey everyone! I’m excited to share my latest project: a tiny, open-source RP2040-based board with an integrated addressable LED matrix. It’s built on a 4-layer PCB, and the LEDs are ultra-small (just 1mm x 1mm each), using WS2812 for full addressability.
I started tinkering with transistors because it’s what I am mostly learning this semester. First I tried to control output using the PWM pin from my RPi. After that I got the idea of building an RC car and doing the input to the motor from scratch. My first working test is an H-bridge using 4 npn and 2 pnp transistors with modulation through the Q2 and Q4 npn.
Right now I can generate a rectangular wave. The 2 LEDs are in opposite directions, so a positive voltage turns one and a negative the other. The This week I want to bring it to uni and test the sinusoidal generation and efficiency with the oscilloscope.
Open to anything, including discussions, complaints, and rants.
Sub rules do not apply, so don't bother reporting incivility, off-topic, or spam.
Reddit-wide rules do apply.
To see the newest posts, sort the comments by "new" (instead of "best" or "top").