Reddit:Electronics

It's designed to step 12 or 24V down to 5V to power sensors in automotive/robotics wiring harnesses. Can do 2A continuously and 4A peak. It goes in a Deutsch connector so it can be potted in epoxy and made fully waterproof.

it’s a 59 second digital clock 👍

I finally finished the board design and ordered it. Can't wait to assemble and try it.

2 Layer PCB with still relatively solid ground plane, 12V to 5V and to 3.3V buck converter with 10A continous output each. 19 Analog inputs, 4 analog outputs, 8 I2C channels (Multiplexer), 12 Digital Outputs + 4 for the Relais (Relais 230V 10A with adequate Insulation on the PCB side of things), 9 digital inputs. Yeah I know, it is ridiculus, but I wanted a challenge and this sure was a challenge. Took me 3 weeks to design this thing...

The 3.3V and 5V Buck converters are by the way used, to provide Voltage for the IO ports - just hook a sensor to it and it gets power of this board directly. At least that's the goal. :D The 8 channels of I2C however are limited to 3.3V - there is simply no room to hook up another level shifter just to allow for 5V input. I think it is fine for me.

Especially after JLCPCB decided to charge extra for the vias - I had to resize 1040 vias by hand. Thanks JLCPCB...

I will never need all IO ports at the same time, but I just wanted a universal approach, where I can just solder on what I need and have no limitations (apart from speed of course!).

The starting point was, that I need a board that allows me to hook up a lot of sensors for my green house and than I thought: Why not also add more sensors like use it as a wether station?

I have no idea, how the board comes out and if I did any super stupid mistakes, I hope not...

But I can't wait for it to finally be soldered together (in roughly 2 weeks when I receive this thing)

Disclaimer: Some of the 3D models are just from the library and not the actual models. I just added it for visual fun. I mean, ESP-01 for example does not look like that lol. And if you think the diode sits a bit crooked below the power input... Yeah you are absolutely correct! It should (tm) do the trick (maybe).

Here’s a unique clock from the late 70’s / early 80’s made by ESE. I can’t find any other examples of a Panaplex style clock by ESE; only other clocks in the same enclosure that use Numitron / LED displays. I bought this from a collector friend of mine recently, and decided to clean it up and lace the internal wire looms to make them look a bit better. Another popular Panaplex clock is the HeathKit GC-1005, which sold extremely well in the early 70’s as a kit for you to build. Eventually I’d like to find one of those, but I think this ESE is a bit better looking. I love the brushed aluminum accents on the top and bottom. The displays in this unit look great with no flickering, and appear to have little to no time on them. I’m glad to finally get a Panaplex clock into my possession.

2 orders, months apart. difference is one board is assembled. shipping went from $2 to $80. What the actual heck (no stencil, gust the boards with some smt components)

Hey r/electronics,

Sharing my final project for the third year as an apprentice, an electronic dice and slot-machine for trial apprentices. The main challenge was the multiplexing of the matrix and the logic behind it.

It uses an AVR64DD14 to drive a 3x3 LED matrix (multiplexed) and reads a tilt sensor for shake detection. Powered by a 3V coin cell. Includes a basic dice function and a slot machine game, with potential for more animations. We're using a mix of THT and SMD components, aiming for beginner-friendly soldering.

Its my first post here so if you want to know anything more about the project, please let me know!

Submission is tomorrow, wish me luck :)

I was taking out an old solar power bank that had a “lithium ion battery” , salvaging it for the solar panel, and I found this little goober.

Professor gave these to me. All but maybe 5 are unlabeled. All transistors. Wish me luck figuring them out.

As a Ducati owner, traveler and overall a “I can fix that” guy, in the years I’ve put together a kit of items that are the essentials for fixing or debugging on the field most stuff. The kit comprehend: - Programmable PSU + Leads - LiPo holder + charger + boost to 12V with integrated light - Soldering Iron TS80 (converted to usb C with PD) - Lighter - Shrink Tubes and hotglue - Cable Ties - Wire and solder - Pair of Tweezers - USB C cable - Precision cutter - Multitool with Wire strippers - A “Roll” of thermal resistant tape, copper tape, electrical tape

All the textile comes from a pair of broken underwear that I have very unprofessionally sawn together.

The kit pretty much always goes with me, if I need to travel via plane I just remove the wire strippers (since they have a knife in them). In the years this thing was useful to me multiple times I do also have a stripped down version that is pocketable.

I wanted to share it since I believe could be of use to some.

ive got a lot to learn but i made some progress today and successfully hooked up some shift registers.

things that stumped me for a moment:

SR-LED-RESISTOR- GND is a bad time, didnt think it was an issue because i wasnt well grounded ...in the fundamentals of zappy zipzops can travel up the backside if there is no diode to divide

apparently 3 of the 4 rails on a push button are needed as you have to open yourself to the idea of grounding the unused path or else suffer the random flickering of your LEDs as they imitate fireflies.

im sure i will fuck up more in fantatically silly ways in yhe future but today is a small win none the less.

I do have 2 Hakko FX-100 one for micro soldering and one for bigger tips. They have more than 6 years of almost daily use. But everywhere I go nobody seems to know they exist. To me, old JBC and Weller user, are the holy grail of soldering, the tips are lasting years and they do heat up in couple of seconds, handling thermal grounds like a champ. BTW I did buy mine years ago and they were less than half of what they cost now (WTF)

Since I got taught a lot of new things with my last post, here's another fun peice in my collection. An XM22 Automatic Chemical Agent Detection alarm another chonky over engineered peice of tech that will last forever

It's your old basic digital clock project but with simple gates made of diodes and transistors.

Left - minutes 00-59 logic with 7490s and diode-transistor logic

Middle - PCB for hour 00-23 logic

Right - 1Hz clock module with 4060 counter and transistor divide-by-2 latch and "pseudo-sawtooth" output

Picked up this DARPA translator today and busted it open to view the shiney bits

build + demo: https://youtu.be/7fNYj0EXxMs

The menu is navigated using a rotary encoder, and each channel has an LED indicator.
Two lights can be set to either automatic or manual mode independently.
The air pump operates at 30 Hz, and its duty cycle can be adjusted from 10% to 20% in 5% increments, super silent! (The bobbin was rewired to work with DC.)
The water pump can be toggled on or off for maintenance purposes.
A DS3231 real-time clock is used, powered by a custom lithium-ion backup battery with integrated charging circuitry.
An AT24C32 EEPROM is used for memory storage.
The software is developed using the Arduino IDE.