3D printed useless box. Arduino driven. Features 4 servos and a gesture/proximity sensor. Contains a 16 LED neopixel ring. All parts are easy to source. Sketch and pcb files can be found at Github, see below. Also available at Thingiverse und Prusaprinters.
https://github.com/pstimpel/uselessbox
I found this Winnie model on thingiverse, scaled it up to 200%, changed details at the honeypot to insert some lights, and created a base for keeping battery and switches. The circuit controlling the LEDs is using a 555 timer to switch the LEDs off after 15 seconds. The LEDs are some of those self blinking ones. The "honey" was hollowed as well, and printed in some transparent PLA.
Thingiverse: https://www.thingiverse.com/thing:2918509
This is a complete new journey. I was hooked by Moritz Klein, Kristian Blåsol and Sam Battle (LOOK MUM NO COMPUTER). So, let's build a modular synthesizer. 6 weeks of struggling with analog circuits and a lot of help from Moritz Kleins Discord later: We have sound. Right now there is a Shapes V2 VCO based on the videos of Moritz Klein, and 2 LFOs based on a circuit I found at the channel Something'sGoneWrong! And hey, I like it. Next steps: filters, a sequencer, and drums!
I thought my Grandson would enjoy a toy like this, so I fired up Fusion 360 and designed tracks, the locomotive, and the tender. More to come ... but this is the maiden voyage. The sound is done by an arduino nano connected to a hall sensor. A small magnet in the tracks is triggering the DFMiniplayer and plays the sound file once the tender is driving over the magnet.
This is a waveform generator based on the well known XR2206 IC, Arduino driven. Details of the build can be found at github, including STLs for the 3d printed enclosure, circuit schemes, gerber files and BOM. Visit https://github.com/pstimpel/waveformgenerator
Are you looking for a constant current / constant power load for your smaller electronics projects, arduino driven, utilizing a nice little LCD and an easy to use interface? Might be your search came to an end right here.
Around 2 years ago GreatScott came up with an adjustable constant current load based on Arduino - watch his video here:
https://www.youtube.com/watch?v=VwCHtwskzLA
Now I was in need for a constant current load as well, so why not just to improve his design? Here we go. All the project files including the 3d printed case and the gerber files can be found at github:
https://github.com/pstimpel/ConstantLoad
The basic project is the same. I added a temperature sensor to know when the mosfet gets too hot. And I changed the sensor, so we need no voltage divider and current sensor, but instead one of the INA219 sensors which can measure both voltage and current. On top, I was optimizing some parts of the software, and added some basic protection measures as well.
DIY Function / Waveform generator, DDS, based on AD9833 / GY9833, with Sweep and Random function. 20 volts peak to peak, Firmware update OTA, MQTT control and status to connect it to your Home assistant.
Details: https://s.ywc.de/functiondds
Based on work of GreatScott and others