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Discussion and news about component-level electronic circuits.Electronic systems and circuits
Updated: 4 min 17 sec ago

Weekly discussion, complaint, and rant thread

Sat, 11/23/2024 - 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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Magic spinny

Fri, 11/22/2024 - 13:30
Magic spinny

I got bored and made a bench power supply to power my magic spinny and my blinkys.

submitted by /u/JollyCompetition5272
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I think i just found the issue thats been plauging my trs-80

Fri, 11/22/2024 - 04:21
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

submitted by /u/the_potato_of_doom
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After near a year, it have grown quite a bit.

Thu, 11/21/2024 - 00:02

From just one meter, variable transformer and oscilloscope, to full bench with wave generator, self made capacitor bank, "universal" counter, and all types of Unitra Nixie Multimeters. All from 70's and 80's. Even the camera is from that years and still works great.

submitted by /u/Papa_Tronik
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Old ENI CD V-700 6b upgraded to a scintillator detector

Wed, 11/20/2024 - 18:34

This modification kit, paired with a Mk.1 scintillation probe has given my old CDV 700 which previously was not functioning due the high voltage circuit issue new life. I thought about repairing it, but then thinking about the cost and time involved in that an upgrade sounded like the best option, and it makes the unit way more sensitive to gamma radiation than the old Geiger counter was. The fact that it’s Arduino based also allows for further tweaking. It’s an understatement to say that I am quite happy with the unit, I’m actually very excited about it. It works extremely well and Nick at RadView has been very helpful throughout the process of upgrading my CD V-700 answering questions that I had on his discord support forum. I’m not receiving any compensation I am just a customer that wants to see him succeed at making innovative, useful radiation detection products. He makes other things as well including the alpha hound. Check out his website below. I also made a short video of my modification.

https://www.radviewdetection.com/cdv-x-radview

https://youtube.com/shorts/QWrotktEZGM?

submitted by /u/NoAnything604
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What is this connector ?

Sun, 11/17/2024 - 14:01
What is this connector ?

Looking for a replacement connector.

submitted by /u/1973gman
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Weekly discussion, complaint, and rant thread

Sat, 11/16/2024 - 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
[link] [comments]

Modifying generic automatic cat feeders to much simpler web interface using ESP8266!

Tue, 11/12/2024 - 19:40
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:

https://github.com/captmicr0/EspCatFeeder

submitted by /u/rhyno95_
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