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OpenChrono
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3D printed Arduino Airsoft Chronograph
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OpenChrono
Thomas Buck b9c8e0b5b2 add perliminary part list to readme 2 years ago
firmware show multiple joules calculations with different weights 2 years ago
hardware Initial commit 2 years ago
.gitignore Initial commit 2 years ago
README.md add perliminary part list to readme 2 years ago

README.md

OpenChrono

Chronograph for Airsoft use, released as Free Open Source hardware and software! Uses a 3D printed housing to hold an Arduino, an OLED, batteries and two photosensitive light barriers.

Hardware

Take the STL files from the ‘hardware’ directory or modify the included OpenSCAD design and create your own custom STLs.

Required Parts

Description Type Count
Arduino Nano 1x
LCD 128x64 I2C SSD1306 0.96” 1x
Slide Switch 1x
IR Phototransistor SFH 309 FA-5 2x
IR LED 3mm 2x
Resistor TODO 2x
Resistor TODO 1x
Screw M2 10mm 4x
Screw M2.5 10mm 2x
Screw M3 10mm 4x
Heatmelt Insert M3 8mm 4x
AAA Battery 3x
Bat. Terminal Neg. 3x
Bat. Terminal Pos. 3x

Software

This project uses the U8g2 library by olikraus to draw to the I2C OLED display.

You can compile and flash the software using either PlatformIO or the standard Arduino IDE. In the latter case, install the U8g2 library using the Arduino IDE Library Manager and then flash as usual.