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STD SmartSpin2K

License: CERN Open Hardware License

Mode: Editors' pick

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Update time: 2021-11-29 17:03:19
Creation time: 2021-07-01 15:10:42
Description

Hardware (3d Printed) and Software Project that uses an ESP32 and stepper motor to control spin bikes that have a resistance knob. The initial target was to use it with Zwift: stationary bike up hills and feel the burn.

Optionally, the SmartSpin2K project has also progressed to the point of where it's useful without the hardware as a BLE device multiplexer, heart rate to watt converter (estimator), and proprietary BLE device to normal FTMS protocol converter using only the readily available ~$6 ESP32 devkit.

 

This is the initial design for a full prefabricated custom PCB with components already soldered. It has not made it past prototype stage and there isn't an enclosure designed to fit it yet. 

Design Drawing
schematic diagram
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PCB
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ID Name Designator Footprint Quantity BOM_Supplier Part BOM_Supplier BOM_Manufacturer BOM_Manufacturer Part
1 0805 3V3,3V7,5V0 LED-0603 3 C2286 LCSC KENTO KT-0603R
2 1uF C1,C14,C15 0603 3 C15849 LCSC SAMSUNG CL10A105KB8NNNC
3 10uF C2,C5,C7,C4,C11,C16 C1206 6 C13585 LCSC SAMSUNG CL31A106KBHNNNE
4 4.7uF C3 C0603 1 C1705 LCSC SAMSUNG CL10A475KP8NNNC
5 10uF C6 0603 1 C19666 LCSC SAMSUNG CL10A475KO8NNNC
6 100nF C8,C9,C10,C13 C0805 4 C49678 LCSC YAGEO CC0805KRX7R9BB104
7 22nF C12 C0603 1 C21122 LCSC SAMSUNG CL10B223KB8NNNC
8 B2B-XH-A (LF)(SN) CN1 CONN-TH_B2B-XH-A-LF-SN 1 C24192 LCSC BOOMELE XH-2A red RHOS
9 XH-4A CN2 CONN-TH_4P-P2.50_XH-4A 1 C146106 LCSC Boom Precision Elec -
10 B550C-13-F D1 SMC_L6.9-W5.9-LS7.9-RD 1 C134461 LCSC Diodes Incorporated B550C-13-F
11 M7_C392013 D2 SMA_L4.4-W2.6-LS5.0-RD 1 C392013 LCSC Guangdong Hottech M7
12 PJ-307C J1 AUDIO-TH_PJ307C 1 C16684 LCSC BOOMELE PJ-307C
13 47uH L1 IND-SMD_L12.5-W12.5_SWRH1207B 1 C60659 LCSC Sunlord SWRH1207B-470MT
14 USBMICRO_20329 MICRO-USB1 4UCONN_20329_V2 1 C10418 LCSC ValuePro micro USBFemale
15 SWITCH,3*6*5PLASTIC HEAD WHITE,260G, 0.25MM,SMD PROG1 SMD-6X3.6 1 C115357 LCSC ALPS SKRKAEE020
16 MMBT2222A Q2,Q3 SOT-23(SOT-23-3) 2 C171740 LCSC SK MMBT2222A
17 10K R1,R2,R5 0402 3 C25744 LCSC UniOhm 0402WGF1002TCE
18 100 R3,R14 0402 2 C25867 LCSC UniOhm 0402WGF1501TCE
19 1K R4 0402 1 C11702 LCSC UniOhm 0402WGF1001TCE
20 100K R6 0603 1 C25803 LCSC UniOhm 0603WAF1003T5E
21 .11R R8,R9 1206 2 C247458 LCSC Uniroyal Elec 1206W4J011KT5E
22 150 R15 0603 1 C22808 LCSC UniOhm 0603WAF1500T5E
23 ESP32-WROOM-32D U1 ESP32-WROOM-32D 1 C473012 LCSC ESPRESSIF 乐鑫 ESP32-WROOM-32D
24 CP2104-F03-GM U2 QFN-24_4X4X05P 1 C47742 LCSC SILICON LABS CP2104-F03-GM
25 TMC2209-LA U3 QFN-28_L5.0-W5.0-P0.50-BL-EP 1 C465949 LCSC TRINAMIC Motion Control GmbH TMC2209-LA
26 LM2596SX-3.3/NOPB U4 TO-263-5_L10.2-W9.9-P1.70-LS14.4-TL 1 C7929 LCSC TI LM2596SX-3.3/NOPB

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