/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.]

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Tags / Flairs

Please categorize your post by clicking the "add tag" (flair) button after submitting it.

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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

927,967 Subscribers

132

I built myself the most cute power supply you ever saw.

I mess around with LEDs a lot. I have a laser engraver and I like to make little battery or USB powered lamps. So I'm forever messing around with batteries, resistors, and different LEDs, usually powered from the USB port on the back of my keyboard. Recently I found myself needing 12V, and I couldn't get it anywhere.

So, I put my thinking cap on. I need a small PSU. First off, it can be battery powered using one of the lithium batteries I have a bunch of. So it'll need a TP4056 in there too. No problem. Then I figured, what if I use one of those step-up boards, with the links for 5V, 9V, 12V, but instead of the links, I wire them to switches? Yeah, that should work. So I was ordering the parts, found a nice little voltmeter to put on there too.

Well the parts arrived today so I got to designing. First off, those links on the step-up board are tiny. 0.5mm pencil for scale. Luckily, one end of the link is 0V so I can pick that up elsewhere. Only need to attach two wires. Still fiddly though. Having decided on a basic layout, I cut the box and did atrial fitting. So far so good.

Got it partially wired up, big blob of hot glue to support those wires, quick test and it works perfectly. Yay! (Ignore the odd display, it's multiplexed and messes with the camera shutter.)

Wired it up for real, stuck a little breadboard on top, and there it is.

https://preview.redd.it/bvgb953zuqrb1.jpg?width=2493&format=pjpg&auto=webp&s=abe1835241a857adbde8903f69fc64fc270587d4

23 Comments
2023/10/02
07:49 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").

8 Comments
2023/09/30
15:00 UTC

217

"pocket scope"

Apparently back in the day people had big pockets 🤣

15 Comments
2023/09/28
01:00 UTC

166

My first PCB design: USB to UART

This is my very first drawing, I will send the this to pcb manufacturer soon. Hope I can get some advices and tips so I won't fry my stuff wasting other components.

66 Comments
2023/09/26
16:35 UTC

55

Reverse engineering a vintage analog synthesiser, adding USB wit just 2$ worth of components

9 Comments
2023/09/24
17:10 UTC

0

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
2023/09/23
15:00 UTC

244

Things you do when you forget to order 0R2 resistors 🙄

Forgot to order 0R2 resistors in my BOM. Oh well, time for some good old fashioned botching to save the day.

47 Comments
2023/09/22
19:14 UTC

139

Found my old SP0256-017 speech generator (Radio Shack part number 276-1783)

16 Comments
2023/09/21
21:02 UTC

56

🙌

17 Comments
2023/09/20
19:30 UTC

168

RCA photomultiplier

10 Comments
2023/09/19
13:33 UTC

271

Crimping ain't easy

Spotted this monstrosity in the wild

64 Comments
2023/09/17
23:23 UTC

34

Linear regulation circuit just for fun

It has no any practical purpose. However I think it got somewhat fancy so I post it.

So it has adjustable output voltage and overcurrent protection. The goal was to make something with minimal set of basic parts.

Simulation here https://tinyurl.com/ywqfok6x

Would be cool to hear any design suggestions, but again it is just for fun and probably won't be wired

14 Comments
2023/09/17
16:19 UTC

105

This vending machine serves Raspbery Pi and Bread boards

There are a few capacitors to nibble on if you are still hungry:

Vending machine in the basement of Portland State University's engineering building

12 Comments
2023/09/16
20:58 UTC

0

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
2023/09/16
15:00 UTC

334

You do get better at soldering, right?

158 Comments
2023/09/15
06:18 UTC

1

what do you think

what is your experience with chatgpt when it comes to electronics ?

\"me: show me diagram of multivibrator\"

9 Comments
2023/09/12
12:03 UTC

56

Saved Synology NAS today

Saved a NAS ds2415+ a friend given to me for free because did not booting at all. It was the notorious bug of the intel c2000 processor.

13 Comments
2023/09/12
08:59 UTC

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