/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.
Rules
Be civil: Do not insult fellow Redditors. Do not yell. As this is a professional sub, act and speak professionally.
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.
No commercial or promotional posts: advertising, endorsing or praising a company, fundraising and crowdfunding, giveaways, sponsored products and services, selling, offers, product announcements and information, blogs, videos, pictures of / links to commercial boards. Applicable even if free or if submitter does not benefit monetarily. This sub abides strictly to Reddit's Rules of Self-promotion. [Post offers related to electronic engineering in /r/ElectronicsList]
Add a flair your submission.
- 'Project' must link to full (non-commercial) build instructions. Otherwise, use 'Gallery'.
- 'Tip" is for tricks and suggestions useful to the electronics designer
Off topic
- 2a) Ready-made electronic assemblies (e.g., a Single-Board-Computer - Arduino. PI -, a relay module, a computer mouse); projects that are based entirely on such ready-made electronics assemblies (e.g., a green-house watering system that uses an Arduino and no other electronic components)
- 2b) Plain electrical components and circuits (no active components), such as transformers, relays, resistors, light bulbs, cables, batteries, connectors, sensors)
- 2c) Consumer products (marketed as "electronics") or self-made products, even if historically significant. Do not post an enclosed assembly just because it contains 'electronics' internally
- 2d) Questions [Ask questions about electronic circuits and components in /r/AskElectronics]
- 2e) Memes (pictures w/text), low effort ("shit-posts"), as decided by the mods. [If about electronic circuits and components, post in /r/ElectronicsHumor]
- 2f) Labs and test equipment [If electronics, post them here on a Wednesday. No submissions that may be considered to be focusing on equipment brands rather than technical merit. One submission a week max.]
---- Click HERE for our Wiki ----
Tags / Flairs
Please categorize your post by clicking the "add tag" (flair) button after submitting it.
Click a tag name below to view just the posts in that category
CLICK HERE TO RESET TAG FILTER
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.
If you are just posting pictures or videos with no further write-up, please use the 'Gallery' tag.
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.
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'!
Related subreddits
- Ask Electronics
- Electrical and Computer Engineering
- Digital Electronics
- Logisim digital circuit simulator
- FPGAs
- DSP
- PLC - Programmable Logic Controllers
- PrintedCircuitBoard
- RF Electronics
- Electronic Circuits
- ECE Component Exchange
- Nice Chips
- AppNotes
- The AmpHour
- Hardware Startups
- Engineering
- Amateur Radio
- Car Hacking
- DIY Tubes
Electronic circuit design and repair questions go in /r/AskElectronics •
View and contribute to our wiki page for beginners
Banner from original picture by Sergej Klammer (/u/zappadoing). Used with permission. Licence: CC-BY-SA*
↓ (please edit!)
/r/electronics
1,254,980 Subscribers
Weekly discussion, complaint, and rant thread
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").
16:00 UTC
build a heart led pcb
11:26 UTC
Portable Workbench Setup :)
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:
- I used glued wood planks cut to 40cm x 50cm.
- Made a small shelf for my soldering station by gluing wood scraps together, then secured it with screws.
- Added a hole at the back for the power supply, handles for easy carrying, and rubber feet to keep it stable on any surface.
- Screwed my soldering equipment onto the board so everything stays in place.
Now, I can set up and start working in seconds, and so far, it’s been a game-changer!
14:04 UTC
Music synthesizer built on lots of breadboards
19:44 UTC
My own designed linefollower robot
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
19:24 UTC
Never ever use a rubbing alcohol to clean old acrylic plastics
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.
19:03 UTC
First time desoldering all the thru-hole and most of the smd’s
19:03 UTC
Weekly discussion, complaint, and rant thread
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").
16:00 UTC
Magic spinny
I got bored and made a bench power supply to power my magic spinny and my blinkys.
11:30 UTC
Well i made a post 30 seconds ago thinking i found my problem, but then i found somthing else lol
02:39 UTC
I think i just found the issue thats been plauging my trs-80
I think this ceramic disk has gone bad, the dark line is much clearer in real life than in the photo too
02:21 UTC
Laser Diode I pulled from a DVD Reader
19:28 UTC
Weekly discussion, complaint, and rant thread
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").
16:00 UTC
Making LED chaser circuit with a 555IC and BC547 transistors
19:07 UTC
This one got pass quality control.
18:18 UTC
How about 1200+ logic gates, 17 x 6502 CPUs and a giant hand wired board?
02:19 UTC
1975: Hagelin CRM-008 Two-dimensional voice scrambler
19:53 UTC
Modifying generic automatic cat feeders to much simpler web interface using ESP8266!
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:
17:40 UTC
My latest Project: an RP2040 board called Nova
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.
16:29 UTC
Possible future import tariffs on PCBs / electronic components / test equipment coming into USA
23:42 UTC
My first inverter!
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.
18:36 UTC
Weekly discussion, complaint, and rant thread
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").
16:00 UTC