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Discussion and news about component-level electronic circuits.Electronic systems and circuits
Updated: 1 hour 28 min ago

LEDs as muon detectors

Tue, 12/26/2023 - 20:58
LEDs as muon detectors

Negative voltage puts the LED in avalanche mode. When a cosmic ray hits, current mirror charges the cap. Then positive voltage allows the cap to drive the LED via n channel MOSFET.

submitted by /u/Advanced_Tank
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Philips Electronics Kits from the 90s

Tue, 12/26/2023 - 00:42

Does anyone remember the Philips Digital Lab and Fun with Electronics kits from the 90s?
They came with computer software which explained in great detail how all of the circuits worked, and I played with them a lot as a kid. Some of the projects were making random number generators, metal detectors, and making memory with the logic gates.

They won awards and were really good, and yet I can't seem to find a trace of them on the internet. And I've never been able to find an electronics kit that is just as good, so it's a shame they don't make them anymore.

submitted by /u/Few_Woodpecker866
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Strange Vintage LED

Sun, 12/24/2023 - 21:25
Strange Vintage LED

I have this odd LED laying around, unfortunately, I accidentally burned it out a long time ago. The plastic piece (not sure what that's called) is orange, but I remember that the actual diode inside it glowed green. It was part of a custom-built telescope lens case, and the light would turn on when you opened it. The case was maybe from around 1977.

submitted by /u/Successful_Panic_850
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I messed up my pcb (rant)

Sun, 12/24/2023 - 20:53
I messed up my pcb (rant)

The relay datasheet in pdf had a footprint viewed from bottom. The Web page version had no mention of the layout being a bottom view. My footprint has n.o. and n.c. flipped. I had to add a jumper on the underside. How common is it to have bottom views? https://www.citrelay.com/view_relay.php?series=J107

submitted by /u/pierre__poutine
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A little Christmas tree present in the making

Sun, 12/24/2023 - 07:39
A little Christmas tree present in the making

I used a XIAO ESP32S3 controller board, 9 LEDs and 9 resistors and some wiring and soldering. It’s going to be a broach for my “gorlfriend”.

3D printing is next.

submitted by /u/SignificantManner197
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Can u spot whats wrong 😅

Sat, 12/23/2023 - 20:48
Can u spot whats wrong 😅

Ordered from ali and ye 🤣 it has been 15 days since i got it and now i actually started looking at it.

submitted by /u/valzzu
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Weekly discussion, complaint, and rant thread

Sat, 12/23/2023 - 18:00

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").

submitted by /u/AutoModerator
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Made a 555 timer playground circuit

Fri, 12/22/2023 - 11:02
Made a 555 timer playground circuit

https://preview.redd.it/aeystckl9t7c1.png?width=860&format=png&auto=webp&s=5b2f381959c5d6ed1b7a55385512fef53e2c3687

A while ago, one of the very first electronic projects I did to get my feet wet in my new hobby, was to design and build a 555 timer "playground" that allows setting different modes.

As a software guy, I'm used to "playground" sort of projects and I thought I'd do the same with this project, albeit in hardware.

Sharing here since perhaps beginners in this space might find it interesting/educational/useful.

It was a fun little project and I enjoyed creating it, including the PCB layout and 3D printed case.

Build schematics and write-up

Show and tell on YouTube

submitted by /u/Artful3000
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