Pulsing Puberty Heart

thingiverse

I created this vibrant heart for my daughter navigating adolescence. It pulses steadily at approximately 60 Hz. If someone is approaching, the pulse accelerates. At a distance below 30 cm it's racing wildly. Check out the video: https://youtu.be/7WT9LreD2JA The distance to a person or object is measured using ultrasonic technology, and the entire circuit is based on a compact Arduino board I designed myself. The schematic and PCB design files are included as well. The ultrasonic component is built around the popular HC-SR04 module, which I modified slightly to fit my custom circuit. I replaced the angled 4-pin header with a straight one, allowing the module to be easily plugged into my board. The 22 LEDs are 5050 RGB NeoPixels from Adafruit, and a Light Dependent Resistor (LDR) is integrated to measure environmental light levels and control the brightness of the LEDs. A TQFP AtmelMega328 microcontroller powers the system, but make sure to flash an Arduino bootloader onto the chip before soldering it in place. A 5-pin interface for programming the chip is also included, which can be connected to a FTDI2USB breakout board using wirewrap strips or cable. The Arduino sketch is available in the files section. A 3.7 LiPo 400 mAh cell with JST plug serves as the power supply. Everything fits neatly inside the heart-shaped case, and users can attach it to their clothing by hot-gluing a clip from an old button sticker onto the backside or using the small ring with a chain. Check out my other NeoPixel project: The NeoPixel Goggles. Print Settings Printer: Orbot Hadron Pro Rafts: No Supports: Yes Resolution: 0.2mm Infill: 40% Notes: All parts were printed from red PLA with 40% infill. Print the HeartV2AOberteil with support, and the HeartV2AUnterteil without support, with the flat side facing down. How I Designed This Designed using FreeCad 0.16