Has a couple little mishaps but it plays!

Fully automated portable book scanner

It’s an ESP32 S3 N16R8, a 4G A7682E simcom modem, and it can make calls, and send texts! It has a 2MP ov2640 camera, and a 3000mah battery, it also has a 3.5” 480x320 touchscreen, and a headphone jack with a buzzer for notifications!

Saw this post from CW&T on Instagram this morning. Their arduino device that counts out loud to a billion suffered a brownout. Apparently the longest arduino uptime. Running since May 2009! A sad day for Arduino fans.

A little HR-SR04 sensor and a stepper motor, with a Java applet to make the "radar" screen.

Source: https://howtomechatronics.com/projects/arduino-radar-project/

My friend made this smart clock / display that works by exploiting the Persistence of vision illusion. Using a spinning 3D printed cap, it converts two LED rings into a circular display of 720 pixels. I contributed by making the app!

Inspired by the live subway map from MoMA: https://store.moma.org/products/traintrackr-nyc-subway-circuit-board-2, I wanted to make a version more like the actual map i see everyday throughout the city. I used a 16x32 led panel and a 3D printed bracket to route PMMA filament light guides to each station. It was painstaking and I would recommend a different method for this, as the shadow box I used could barely close due to the filaments not bending well, as shown above. Nonetheless, I think the end result is pretty decent and the lights are vibrant. The ESP gets live subway positions from a flask server I host which just polls the MTA’s GTFS every minute or so. The sign itself updates every second which shows how lively the subway is, overall I’m quite happy with it!

I am super proud of how this project is turning out. I still have some tweaks to make, but I finally got full videos playing and wanted to share.

This is a "Persistence of Vision" (PoV) display driven by a Teensy 4.1 and SK9822 LED strips.

There are 4 strips of 32 LEDs, each slightly offset in order give me 128 addressable pixel "rows". So each strip is responsible for every 4th row.

360 pixel "columns" around the perimeter makes for roughly square pixels, so thats what i went with. Each LED is updated 360 times every revolution...at around 1500rpm.

A hall effect sensor at the top of the rotor passes by a stationary magnet in the upper frame once per revolution. The Teensy measures the time between the resulting signals, and uses that to calculate how fast it is spinning, and therefore how fast to update the LEDs. This lets the animation look correct regardless of rotor speed.

I have a (currently very slow) python script that resizes/crops and formats .mp4 files into a binary format that the Teensy can use very efficiently. The resulting binary gets saved to a microSD, that the Teensy can read from.

Im happy to answer any questions. I may do a better build/explanation video if there is enough interest.

It's very, very, very basic. I'm sure any of you would give me ten to zero, but I'm happy with the result... For now! But I still have a small problem, some engines (mg90 metal 360) are making loud noises and are failing, this is not normal, right? I think I bought bad quality engines

I was obsessed when I first saw Mark Setrakian’s claw robot so I decided to make my own.

Here it’s running in standalone mode using:
* 1 x Arduino OpenRB-150
* 12 x Dynamixel XL430-W250-T
* 9 x Red 300mm LED filament
* 1 x Pololu-5592 12v to 3.3v step down (LED power)
* 1 x COM-24144 N MOSFET (switch on/off LEDs)
and 4 x potentiometers to control the globe’s speed/direction, height, width, and depth of each offset step.

I’ve done more movements using a Python based GUI on my laptop but that requires a usb connection and uploading a pass through sketch.

Full video on my build with links to STLs, code and full parts list here:
https://youtu.be/pEU04FVNeZwf

Next project is a Leaper from Arc Raiders. Just need to figure out how to use an Arduino to trigger a rocket to make a robot spider jump.

I made it about 1 year ago. It contains an 128x64 spi oled display with a Arduino Nano, a boost converter, buttons, and a battery.

I made it becus i saw someone use an oled as a reticle on his reddot sight, i knew that i wanna make one too, at that point this was the first project i work with Arduino.

The 5v booster are not really needed but i dont want to write code to find it current voltage. And to keep the brightness as a consistent levels