Build a DIY timer to perfect your motorized trike lap-times around your backyard.
The post Build a DIY Lap Timer for a Backyard Race Track appeared first on Make: DIY Projects and Ideas for Makers.
Build a DIY timer to perfect your motorized trike lap-times around your backyard.
The post Build a DIY Lap Timer for a Backyard Race Track appeared first on Make: DIY Projects and Ideas for Makers.
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