SmartSpin2K Sourcing Guide

Hardware can be sourced for two versions of the SmartSPin2K - Legacy and PCB. For new builds, we strongly recommend the PCB hardware.

This sourcing guide assumes you have a spin bike that reports wattage over bluetooth or a spin bike with a bluetooth power meter.

You should be able to source all components for < $100 USD including shipping

Common Hardware - All Versions

The components in this list are required for the assembly of all versions of the SmartSpin2K

qty	Part	Amazon	Aliexpress
1	38mm NEMA 17 Stepper	https://a.co/d/iN8ikZy	https://www.aliexpress.com/item/4000474225551.html
1	12 or 24V Power Supply*	https://a.co/d/ifaZIT9	https://www.aliexpress.com/item/32975192317.html
2	Tactile Switches	https://amzn.to/33ezmKx	https://www.aliexpress.com/item/32958087576.html
2	608 Skate Bearings	https://amzn.to/3isBzrW	https://www.aliexpress.com/item/32700232097.html
1	Stereo RCA-->3.5mm headphone "Y" Cable		https://www.aliexpress.com/item/4000204275028.html
1	5/16" x 1-1/2" hex head bolt
1	5/16" washers
2	5/16" nuts

*Power supply can be in the 12v-24v range. Aim for 1amp or greater. If using the SmartSpin2K PCB Kit, you will need a 5.5x2.1 connector.

Optional equipment so you can actually use it for fitness:

qty	Part	Link
1	Assioma Pedals(or similar)	https://amzn.to/3ioSjk7
1	Cheap Spin Bike Check Ebay	https://amzn.to/33mPmKj

Version 3 Hardware

qty	Part	Sourcing	Notes
1	PCB + Wiring Harness Kit	Prebuilt Kit	JST Connectors are pre-soldered
1	PCB (self-sourced)	PCB Files	https://www.aliexpress.com/item/1005001267643044.html
	JST-XH connectors kit	https://a.co/d/14NJyfu	May be required if self-sourcing PCB
	wire and connectors for wiring harness		required if self-sourcing PCB

Common Hardware - Version 1 and Version 2

The components in this list are required for the assembly of all versions of the SmartSpin2K

qty	Part	Amazon	Aliexpress
1	ESP32 Dev Board	https://amzn.to/2ZNyjQX	https://www.aliexpress.com/item/1005001267643044.html
1	TMC2225	https://amzn.to/3kctdEQ	https://www.aliexpress.com/item/4000296898203.html
	JST-XH connectors kit	https://a.co/d/14NJyfu
1	3.5mm stereo headphone connector (shifter connector)		https://www.aliexpress.com/item/4000640677390.html
1	5.5X2.1mm Dc Power connector		https://www.aliexpress.com/item/4000694128319.html

Version 2 (PCB Version, Direct Mount, and Ultra Short Mod)

Please note that not all items provided in links may be in stock at the time of your order. You may need to search for the closest equivalents if out of stock. Screws for case assembly will differ based on the version being built.

Please check the readme.md for the Direct Mount mod for additional required components

Follow the BOM provided below for the latest parts list.

qty	Part	Link	Notes
1	PCB	https://www.pcbway.com/project/shareproject/SmartSpin2k_PCB.html
1	Recom R-78E5.0-0.5	https://octopart.com/r-78e5.0-0.5-recom+power-21698196
1	10uF 50V capacitor	https://octopart.com/50ml10mefc5x7-rubycon-19941930	Source 6mm diameter or smaller
1	100uF 25V capacitor	https://octopart.com/25yxj100m5x11-rubycon-24361474	Source 6mm diameter or smaller
1	0.1uF 50V capacitor	https://octopart.com/c315c104m5u5ta7301-kemet-20253274
1	1K Ohm resistor	https://octopart.com/rnf14ftd1k00-stackpole+electronics-19224710
4	#8 x 1.75" countersunk wood screws		Not used in direct mount mod

Hand Wired Version

This version may be relevant to you if you are a developer or if you'd prefer not to source a PCB.

qty	Part	Amazon	Aliexpress
1	LM2596 Buck Converter	https://amzn.to/33ofggY	https://www.aliexpress.com/item/33014890815.html
4	#6 X 3/4" wood screws	https://a.co/d/iY7kOIK