Reddit:Electronics

whole washing machine program that includes: motor, water level sensor, water flow sensor, 3 valves for water intake, float switch if water is leaking under machine, pump, heater, temperature sensor, door lock, led light inside drum, and front pcb that uses one wire uart

I’m really excited to try some circuits and build a decimal to binary/hexadecimal game. I’m in school for automation and robots, smart manufacturing and industrial technology, so I have a base knowledge of how circuits work. I’ve never used a breadboard, we mostly wire up components to make a complete circuit, more so electrician work. I also got a solder iron recently. I’m really excited and wanted to share. I’ll definitely be back to show the finished project. The breadboard is smaller but I’m sure it’s enough for a beginner. For the most part, I know what the included parts are for. I am excited to get into this!

Custom PCB designed around STM32F405RGT6 for rocket / drone applications.

MCU

• STM32F405RGT6

Interfaces & IO

• ADC input for battery voltage measurement
• 4× PWM outputs
• 1× UART for radio
• 1× UART for GPS
• 1× SPI for IMU
• SWD interface
• USB interface

Notes

• Custom-designed PCB
• Hardware only
• All Fab Files included (Gerber/BOM/CPL/Schematic/PCB layout/PCB routing/and all settings)

Nice little direct driven IN-12 nixie tube clock I designed and made. Decided to go with four 74hc595 shift registers and 36 high voltage mmbta42 transistors all controlled by a stm32.

I actually started working on that over 10 years ago, but my electronics knowledge was basically inexistant and it feel apart quickly.

Now that 3d printers are a thing and pcb design is more easily accessible, I wanted to achieve that old dream of making a portable N64 myself. I've been working on that project for the past 3 months and it's now complete.

Designed the whole case myself in fusion 360, printed in PETG for heat resistance. Designed a few PCBs for controller and audio amplifier.

Here's a list of features:

• Complete N64 with expansion pak
• 7Ah, 7.4v battery pack
• Speakers / Headphone jack / Volume knob combo PCB designed by myself. 0.5w speakers, surprisingly loud
• Switch joystick and buttons, N64 original triggers
• 4:3 5 inches LCD screen
• USB-C PD, 9v charging port, can charge and play at the same time
• Custom PCB for low battery indicator, green led when turned on, turns red when battery low
• Second, yellow LED that turns on when in charge, turns off when fully charged
• Single L/Z combo trigger with a switch beside the trigger to change which it is
• Memory pak to come, still waiting for pcb and fram chips

Fully works with original cartridges, as well as my summercart64. A bit on the thicker side because of the expansion pak, but I'm happy for a first time. At first I did a ram swap, soldering two 4MB ram chips in place of 2MB chips, thus removing the need for the expansion pak, but down the line I fried the board somehow.

Hope you guys like it, will gladly answer if you have questions :)

I realize that this image can be triggering to some. I apologize in advance for any discomfort it could cause 😅

Hey all, I’m a 2nd year student in electronics right now. I know there’s tonnes of handwired keyboards on the internet, but here’s mine.

This is my first time ever soldering or doing anything outside of arduino or simulations. So it’s very messy.

After I finished painstaking soldering the diodes and columns, it turns out I need 19 pins and the pro micro has only 18. I thought my project was a goner, but I found the hack of removing the resistors in the leds to free 2 more pins. I’d never ever done soldering before, and was honestly scared about taking out the resistor from the board, but figured the project wasn’t going to go anywhere if I didn’t do it, so I took the chance and somehow managed to desolder the resistors and put in the legs of the diode which I cut off earlier! But but but, as soon as I started soldering it to a column to test, I ripped out the copper trace from one of the pins and though my project was a goner (again). Thankfully that hack gave me 20 pins, which means I had exactly 19 now (phew).

Maybe you notice the red electrical tape on the switch, that’s because it was meant for the big L shaped enter key which I didn’t have, so I had to use the tape to fit the enter and |\ keys.

Well, it works now; it’s not perfect, the board sometimes misses strokes when I use it because the wires the dangling out, and I currently don’t have anything to secure the back. But it works!

I’m sorry if my body too long or not technical enough, I just wanted to share my work.

When told we’re working on something, profs always ask its application and what issue it resolves. I spent a lot of time and energy on this and I have no answer to these questions, I made it cause I wanted to know how it works and cause I felt I should be able to make it, and I know it’s nothing special or solving any real issue and has a lot of documentation and YouTube videos to make the same. So, I’m just not sure if this work is “sciency” enough to justify it on my profile or even investing that much time into it.

Welp, I had fun so that’s that.

Sorry for the out of topic rant again.

Let me know what you guys think!

Built a free timing diagram editor for hardware documentation.

Visual editor - draw your signals instead of coding JSON. Useful for datasheets, protocol specs, or explaining timing to your team.

Works for:

• SPI, I2C, UART, CAN timing
• FPGA/MCU signal interfaces
• Memory timing (DDR, SRAM)
• Any digital logic really

Imports VCD from your simulator, exports PNG/SVG for docs.

Browser-based: [https://www.wavepaint.net/](vscode-file://vscode-app/snap/code/220/usr/share/code/resources/app/out/vs/code/electron-browser/workbench/workbench.html)

Friend asked me to make a time machine this is what I came up with on my lunch break.