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STD Pi Stepper Hat V3.6
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License: GPL 3.0
Description
This is a Stepper HAT for Raspberry Pi or stand-alone use. It is the board I'm currently using in my SandBot [SandBot](https://robdobson.com/2018/08/a-new-sandbot/) and provides two SilentStepStick TMC2100 positions, two FET drivers for LED light strip or similar and two servo ports. Software is here: [RBotFirmware](https://github.com/robdobsn/RBotFirmware)
Design Drawing
schematic diagram
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PCB
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| ID | Name | Designator | Footprint | Quantity |
|---|---|---|---|---|
| 1 | 47pF | C1,C7 | 0603 | 2 |
| 2 | 47uF | C2 | 0805 | 1 |
| 3 | 47uF | C3 | 1206 | 1 |
| 4 | 100nF | C4 | 0603 | 1 |
| 5 | 10nF | C8 | 0603 | 1 |
| 6 | 1N5819 | D1,D5 | SEEED-DO-214AC | 2 |
| 7 | MBR120ESFT1 | D2,D3 | MBR120-SOD123 | 2 |
| 8 | SMBJ24A-TR | D4 | SMB(DO-214AA) | 1 |
| 9 | LED_OP | D6 | LED-0603 | 1 |
| 10 | LED_ACT | D7 | LED-0603 | 1 |
| 11 | 1N5819 (OPT) | D8 | SEEED-DO-214AC | 1 |
| 12 | Stepper1 | J1 | 1X04_NO_SILK | 1 |
| 13 | Stepper2 | J2 | 1X04_NO_SILK | 1 |
| 14 | Extension | J3 | 1X04_NO_SILK | 1 |
| 15 | SENSE 1 | J5 | 1X03_NO_SILK | 1 |
| 16 | SENSE 2 | J6 | 1X03_NO_SILK | 1 |
| 17 | SENSE 3 | J7 | 1X03_NO_SILK | 1 |
| 18 | SENSE 4 | J8 | 1X03_NO_SILK | 1 |
| 19 | SERVO 1 | J9 | 1X03_NO_SILK | 1 |
| 20 | SERVO 2 | J10 | 1X03_NO_SILK | 1 |
| 21 | MICROSD | J11 | MOLEX SD-503398-003-2 | 1 |
| 22 | HAT Powers Pi | J15 | 1X02_NO_SILK | 1 |
| 23 | S1 CFG1 | J20 | 1X03_NO_SILK | 1 |
| 24 | S1 CFG2 | J21 | 1X03_NO_SILK | 1 |
| 25 | S1 CFG3 | J22 | 1X03_NO_SILK | 1 |
| 26 | S2 CFG1 | J23 | 1X03_NO_SILK | 1 |
| 27 | S2 CFG2 | J24 | 1X03_NO_SILK | 1 |
| 28 | S2 CFG3 | J25 | 1X03_NO_SILK | 1 |
| 29 | DC Motor 1 | J30 | 1X02_NO_SILK | 1 |
| 30 | DC Motor 2 | J31 | 1X02_NO_SILK | 1 |
| 31 | POWER_JACK_SMD_AND_GND_PLANE | J50 | POWER_JACK_PTH | 1 |
| 32 | RASPBERRYPI-B+-GPIO | JP1 | 2X20_NOSILK | 1 |
| 33 | 2X04_NO_SILK_1-27_SMD | JP2 | 2X04_NO_SILK_1-27_SMT | 1 |
| 34 | NTR4503NT1 | Q1,Q2 | SOT23-3 | 2 |
| 35 | BCW66H | Q3,Q4 | SOT-23(SOT-23-3) | 2 |
| 36 | 100K | R1,R3 | 0603-RES | 2 |
| 37 | 1K | R2,R4,R16,R17,R18,R19 | 0603-RES | 6 |
| 38 | 10K | R5,R6,R7,R8,R9,R10,R15,R22,R23,R24,R25 | 0603-RES | 11 |
| 39 | 470R | R11,R12 | 0603-RES | 2 |
| 40 | 27R | R13,R14 | 0603-RES | 2 |
| 41 | ESP32 RESET BUTTON | SW1 | SMD_PUSH_BIG_PADS | 1 |
| 42 | ESP32-WROOM | U1 | ESP32-WROOM_FOOTPRINT | 1 |
| 43 | A4988 Stepper Motor Driver Carrier | U2,U3 | A4988 CARRIER MIN TEXT | 2 |
| 44 | AZ1117H-3.3TRE1 | U6 | SOT-223 | 1 |
| 45 | FT231XS-R | U7 | SSOP20_L | 1 |
| 46 | TSR_1-2450 | U13 | TSR-1 | 1 |
| 47 | MICRO 5PFemale BType all posts Short needle | USB1 | MICRO-USB-12 | 1 |
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