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journaling my DIY electric scooter. features include variable speed, handlebar throttle, physical brake (not connected in the video), suspension fork for weight distribution, fast top speed, and backlit display for battery.

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eddyzow/cold-brew-express

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Cold Brew Express

a DIY electric scooter! Features include variable speed, handlebar throttle, physical brake (not connected in the video), suspension fork for weight distribution, fast top speed, and backlit display for battery.

watch me ride it at https://youtu.be/ShZDwHqLemY?si=LHhTyD6iNOCNyVUB

image image

For links to products in the BOM, go to this google sheet: https://docs.google.com/spreadsheets/d/1F6muKYJhtXkM0ZriuXKycPCZ0PORBCmvhVav8ENI8PE/edit?usp=sharing

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table BOM:

Item Name Purpose Item Source Quantity Unit Cost (includes taxes) Cost Notes
36V 500W 8-Inch Brushless Scooter Hub Motor Scooter propulsion + back wheel Amazon 1 $109.76 $109.76
Brushless Motor Controller 36V 500W 25A Scooter motion control Amazon 1 $37.18 $37.18
36V 10AH Battery Scooter power Amazon 1 $99.91 $99.91
8-Inch Pneumatic Scooter Wheel Scooter front wheel (free-spinning) Amazon 1 $27.61 $27.61
8mm x 150mm Steel Rod Axle for scooter front wheel Amazon 1 $6.37 $6.37
Throttle Accessory To control motor acceleration Amazon 1 $9.45 $9.45
14-Inch Suspension Fork For suspension + to connect handlebars to front wheel Amazon 1 $37.50 $37.50
37mm Headset Bearings To make turning handlebars smoother Amazon 1 $10.63 $10.63
4-Line I2C LCD Display (3) For visual feedback of speed, battery, other telemetry, etc. Amazon 1 $17.87 $17.87 better value than a 1-pack + just in case something goes wrong
Flex Seal Waterproofing housing of the scooter for rain Home Depot 1 $15.92 $15.92
Variable PVC Pipe PVC pipe for handlebars and main steering column Home Depot 1 $21.25 $21.25
Variable Plywood Plywood for base of the scooter + housing of battery and controller Home Depot 1 $21.25 $21.25
Wires and Connectors For wiring electronic components to the microcontroller Amazon 1 $10.63 $10.63 primarily JST-SM connectors, jumper wires, bullet-spade connectors. will purchase as needed
Screws, Nuts, Bolts For assembling the components of the scooter together Home Depot 1 $10.63 $10.63
TOTAL 14 $435.96 $435.96

I already own some necessary parts for this project (arduino, etc) - these are not included in the BOM! I will also gladly pay any surplus costs above the grant amount!

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journaling my DIY electric scooter. features include variable speed, handlebar throttle, physical brake (not connected in the video), suspension fork for weight distribution, fast top speed, and backlit display for battery.

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