DIY Bike Speedometer

I just finished my latest project: A speedometer for my bike. It uses an attiny84 chip as its main processor and an 74ls47 chip as a driver for its 7-Segment Display (7SD from now on). If you have the parts it’s a project you can finish in a day. It requires simple arduino coding skills, intermediate soldering skills and some knowledge on electronics but we are going to cover everything in this instructable. The total cost of the project is around 15€.”

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