Arduino equipped inline sensor skates

Posted on Tuesday, February 17th, 2015 in Arduino, code, LEDs, open source, sensors by the machinegeek

Anurag Mishra writes,

Recently I bought a new pair of Inline Skates. So an idea struck my mind. I modified my skates to give me some results. I wanted to measure the speed with which I am skating and if I get to know the surrounding conditions, that would be awesome. So, I brought an Arduino, an LDR, some LED’s, JHD 162a LCD display, HC SR04 ultrasonic sensor and a DHT11 temperature-humidity sensor.

A wheel of my skates has 8 spokes. I put a LED on one side of the wheel and a LDR on the other side. I am counting the number of pulses in one minute. These pulses are the blockages caused by the spokes to the LDR. Dividing the count by 8, I get the RPM and then Linear speed can easily be obtained.
While skating, a skate is not always on the ground, so I am measuring the RPM only when the skate is on the ground. This, I am doing with the HC SR04 ultrasonic sensor. I have explained this in my video.

All the readings- Speed, temperature and humidity are displayed on the LCD display.

It is portable and battery powered. To make it look fascinating I have put some LED’s for head light, tail light.

A second video is available on YouTube.
The code is available on GitHub.
The project description is on my site.

Via the contact form.

This entry was posted on Tuesday, February 17th, 2015 at 3:00 pm and is filed under Arduino, code, LEDs, open source, sensors. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.

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