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30 lines
1.6 KiB
Markdown
30 lines
1.6 KiB
Markdown
# longboard-speedometer
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A simple Arduino based longboard speedometer.
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### Part list:
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* [Arduino pro mini](https://ru.aliexpress.com/item/1pcs-lot-Pro-Mini-Module-Atmega328-5V-16M-with-Arduino-Compatible-With-Nano/32672852945.html)
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* 4 digit 7 segment 0.56 inch display (I used HS420561K-C30, but other 0.56" 12 pin displays should work just fine)
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* [TP4056 based li-ion charging circuit](https://ru.aliexpress.com/item/Free-Shipping-5V-1A-Micro-USB-18650-Lithium-Battery-Charging-Board-Charger-Module-Protection-Dual/32453058256.html)
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* [Li-Po battery](https://ru.aliexpress.com/item/1-2-4-2019-603040-800/32957830163.html)
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* [Reed switch](https://ru.aliexpress.com/item/Reed-sensor-module-magnetron-module-reed-switch-magnetic-switch-for-arduino/32818692044.html) (Although I recommend getting a hall sensor instead)
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* 2 state switch 14 x 9 mm
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* [Magnet](https://ru.aliexpress.com/item/10Pcs-Mini-Small-N35-Round-Magnet-5x1-6x3-8x3-10x1-10x2-12x2-mm-Neodymium-Magnet-Permanent/32997030821.html)
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* Something to program the Arduino with
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### Useful pics
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| Pin connections||
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| pin 2 - pin 7 | top row of the display pins |
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| pin 12 - pin 17 | botton row of the display pins |
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| pin 10 | sensor data |
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| ACC | sensor VCC |
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| GND | sensor GND |
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| VCC | power + |
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| GND | power - |
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