simple arduino i2c oled bicycle computer
code https://github.com/ldijkman/arduino_bicycle_computer/blob/main/speed.ino
more pixels used in text == better display code https://github.com/ldijkman/arduino_bicycle_computer/blob/main/speed_better_display.ino
10.5 Km = speed
136 = distance in meter
- = magnet is now on sensor
61 = wheelcount pulses
maybe the pullup resistor is not needed since input is pulled up in the code
A3144 is north pole sensitive (needs correct magnet orientation)
Use a neodymium magnet for greater detection range
Add an AD8232 for heart beat speed rate ;-)
Alike heartbeat on fitness bicycle
ECG Monitor https://www.google.com/search?q=AD8232
3D Printer
Nice magnet holder?
https://www.thingiverse.com/thing:2443305
https://www.thingiverse.com/thing:4336157
