/r/electronics

Photograph via snooOG

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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Rules

  1. Be civil: Do not insult fellow Redditors. Do not yell. As this is a professional sub, act and speak professionally.

  2. 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.

  3. 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]

  4. 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

Gallery

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.

General

Electronic engineering-related posts that don't fall into any other category.

News

An electronic engineering-related news article or announcement.

Project

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.

Tip

A useful or insightful technical note on component selection, circuit design or testing etc. - something beyond 'stick decoupling caps everywhere'!


Related subreddits

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

1,083,251 Subscribers

4

Built 1 micron precision measurement tools

https://preview.redd.it/3xmb1xn38d5d1.jpg?width=1477&format=pjpg&auto=webp&s=c785bee1b3e19df4cb8a9a478bab96ffaba95564

I'v built a circuit that use PIC mcu and CCD to measure the width of things (tube) without using micro meter. the result is quite good. However there's a little point I'll improve later. just to make it best tools.

0 Comments
2024/06/08
15:26 UTC

2

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").

1 Comment
2024/06/08
15:00 UTC

104

Component abuse 🤣😂

Bit of a laugh... Random sh&t post...

Knocked up a quick and dirty UV light to try and cure some Chinese solder mask... (Don't ask lol) Running a LOT of UV LEDs And an LM317 with no heatsink... it's dissipating rather a bit of power... 24v supply 🤣

In fact I expected it to blow up 10 mins ago...

Currently sitting on 135degrees C. I could heat my damn coffee on it...

Yet it's still working... Damn... 😂🤣😂🤣😂🤣

12 Comments
2024/06/05
15:06 UTC

10

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").

2 Comments
2024/06/01
15:00 UTC

291

So strange to see USB-C and DIP8 in the same board 😅

This is an attiny85 based IR interpreter i made, it is completely open source (repo and patreon on first comment). The board works, and quite well actually. Planning to distribute some pre-assembled board after a bit of testing. But now it’s time to design a case!

51 Comments
2024/05/31
12:59 UTC

48

For those that asked, here are the finished files for last week's SMD test jig.

6 Comments
2024/05/30
23:09 UTC

219

Curiosity killed the mosquito

Thia is a controller for shutters that failed and was given to me for repair. The component on the left is a mains voltage bridge rectifier. Two mosquitos decided to try and short it out. Did not end well for them.

33 Comments
2024/05/30
11:51 UTC

89

I've had tonnes of fun recently designing my own super bare bones STM32 dev boards. I plan to use them as the brains for all of my future projects. For extra obscurity, I'm also programming them in Rust and it's going super well! More in the comments.

12 Comments
2024/05/30
09:59 UTC

291

my first ever pcb (its for a headphone amplifier)

im waiting for it to arrive and i want to know how bad it is for the first time, its electrically correct but it looks kinda bad with the overlapping text and some other things.

the pcb is double sided and i dont have a photo of the other side.

65 Comments
2024/05/27
07:35 UTC

27

Created a auto phone dialing device

11 Comments
2024/05/26
05:51 UTC

5

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").

3 Comments
2024/05/25
15:00 UTC

359

Pondering my smith chart

15 Comments
2024/05/23
07:20 UTC

84

Hear me out

What if somebody built an entire calculator using only transistors, resistors, buttons and LEDs. No ICs, no logic gates, no arrays, nothing but pure smd transistors. A calculator with 4 7-segment displays (1+1 for the two input numbers, 2 for the result), 10 inputtable numbers (0-9) and 4 operations (+,-,*,/). Everything would be driven by transistors, including the displays. According to ChatGPT (very reliable, I know), it would take around 3000 components to build such a device. Difficult to make? Yes. Cool to look at? Yes!

51 Comments
2024/05/21
21:43 UTC

60

Free electronic components and PCBs for students

Do you know any high school students (or younger) who are interested in learning more about electronics and PCB making for free ?

If so, check out two these two 100% free programs from HackClub:

  • The Bin is for students who want to build projects with Arduino / RP2040 and assorted peripherals. You design and verify your circuit in the amazing WokWi simulator , and we'll send you all the parts to build your design. You can do it again and again.. and it's 100% free !
  • Want to go further and build your own customized PCBs ? If so, check out project OnBoard. Create your design in the PCB tool of your choice (EasyEDA, KiCad, etc).. Submit your schematic and PCB and we'll give you a $100 grant to build your design at a PCB manufacturer . You can build your own bare boards, or have them completely assembled. Your choice !

Join the hundereds of students worldwide who are building cool stuff and falling in love with electonics!

John Cohn PhD
BETA Team Member, IBM Fellow Emeritus and Hackclub Maker

Ps. Here'sn example of the kind of boards students are making:

https://jams.hackclub.com/batch/sparkletilt-pcb

SparkleTilt: a light up level designed by Karmanyaah H

10 Comments
2024/05/18
20:23 UTC

4

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").

2 Comments
2024/05/18
15:00 UTC

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