/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

1,233,490 Subscribers

107

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.

9 Comments
2024/11/09
18:36 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").

2 Comments
2024/11/09
16:00 UTC

405

Warning: Many cheap clip leads coming out of China are made of iron wire.

72 Comments
2024/11/08
17:30 UTC

34

My first own designed PCB a Led Chaser with a 2x 555 + 74hc595 for Halloween prop. I Converted a old alarm system to this.

6 Comments
2024/11/05
22:37 UTC

118

My first 8-bit CPU on FPGA: FliPGA01 (details in comments)

6 Comments
2024/11/05
19:51 UTC

84

My first RLC circuit as a end of semester project (circuits 1)

Just wanted to share my first dc circuit, it is for my first circuits class, as a end of semester project.

It consist in just a relay, a 1000uf capacitor and a 330 ohm resistor.

It still is not the proper or final circuit, as I'm using a 5v relay with 12v as power source. Also it is conected in the "inverse way" as the leds need to imitate signal lights from a car.

Tomorrow I will buy the correct parts but for the moment I'm happy to see that this works and I can do the math to understand it !

1 Comment
2024/11/05
03:54 UTC

243

Inductor i wound for an FM radio circuit

40 Comments
2024/11/04
18:35 UTC

1,954

22 years ago - to the day. I was 12 and had made my first audio amplifier!

52 Comments
2024/11/04
00:04 UTC

15

Just created my first ever video. It explains the concept of RC circuits in a more entertaining way, and I hope many will find it useful!

4 Comments
2024/11/03
01:48 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").

3 Comments
2024/11/02
15:00 UTC

18

The search for "well enough" (not perfection)

I have mad respect for anyone who nails a well-designed PCB on the first go. Meanwhile, I'm embracing the 'iterative approach'—which is a fancy way of saying I make a lot of prototypes and have a constant love-hate relationship with my own designs.

Take, for instance, my simple mix-mode display side project. All I wanted was a nice combo of a 7-segment displays, LEDs, and a bargraph, controlled by a MAX7221 for some other projects. Easy, right? Well, fast forward two years, and I've got a beautiful timeline of my trials, errors, and the occasional "Aha!" moments. Honestly, it's been a journey. My first design was basically a cry for help, but now it's evolved to the point where I am okay with it. But hey, it works now for my main projects.

6 Comments
2024/10/31
11:52 UTC

120

Brother

12 Comments
2024/10/29
08:09 UTC

7

Repair of Belkin Wireless Charger using Freezing Technique

5 Comments
2024/10/28
16:39 UTC

3

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
2024/10/26
15:00 UTC

349

Irish normally closed switch

In ireland we call rain sensors outdoor normally closed switchs

23 Comments
2024/10/26
12:29 UTC

200

Mercury Gas Rectifier

20 Comments
2024/10/26
09:10 UTC

97

I bought a Multilaser M7 3G (brazilian technology company) tablet for my nephew and it came with an apple a8

11 Comments
2024/10/25
11:35 UTC

0

Made with Adobe Photoshop

Alarm that counts using a 7-segment display. Added the ability to use a single scr to latch and power an led with a battery, since the most important element is to have a way to know whether someone is inside waiting to do you harm. A single led accomplishes this. Here's the pcb, and Photoshop even gives me the ability to label it. I simple head over to my local library, and have them print this onto this special paper with their laser printer, and then iron & etch it.

https://i.redd.it/16nes7xdttwd1.gif

15 Comments
2024/10/25
04:05 UTC

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