Two sets of timing gates for racing cars in a school solar car challenge that track and report the speed of each car in each of two lanes.
Project tutorial by nfarrier
Attach an amateur radio to this and the radio will regularly identify itself so others can use their direction finding skills and locate it.
Measure how fast your Hot Wheels car moves at different points on your track or use it to tell how fast your race was.
Use an Android device to control the color of a NeoPixel via a Bluetooth connection.
Project tutorial by Bryce K and Lucas W
Thank you. I made the change. In the comment above I put a link to the best demonstration of your point B. I though about your third point, but I wanted to make sure I completely isolated my circuit from the radio keying.
Thank you. I made the change. The link was helpful. I also found a great demonstration of why they're important here:
It's in line 78 of the code.
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