speed-climbing-timer

A simple, automatic timer rig for rock climbing.

Hardware

Foot sensor: Laser diode + photoresistor pair
Top sensor: Laser diode + photoresistor pair
Screen: 16x2 LCD (hd44780)
Buzzer + Amplifier
On/Off Switch
5v DC Power Adaptor

I/O

2 input pins for photo-resistors
1 output pin for speaker
I2C used pins for LCD

Mechanical

Pictures to follow.

Feel free to contact me for help building your own!