MmStep
About the MmStep PCB
MmStep is an open source PCB design by luni64, published on GitHub under the MIT license. It is a 2-layer board measuring 81 × 49 mm, with 32 components from 22 distinct parts.
Other key parts include the MIC5219-3.3YM5, MCP23017_SS and Pololu_Breakout_DRV8825. By type, the board carries 11 connectors, 7 capacitors, 5 resistors, 4 modules, 2 ICs and 2 switches.
It belongs with the robotics & motion designs in this gallery.
From the project
Stepper driver board for the sparkfun MicroMod system. Compatible to DRV8825, A4988 etc.
Gerbers and drill files can be found in the production folder
Schematic, pictures, pinouts and datasheets can be found in the documentation folder.
Main components on the MmStep
MmStep bill of materials (BOM)
32 components, 22 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | MIC5219-3.3YM5 | SOT-23-5 | U1 |
| 1 | MCP23017_SS | SSOP-28_5.3x10.2mm_P0.65mm | U2 |
| 4 | Pololu_Breakout_DRV8825 | Pololu_Breakout-16_15.2x20.3mm | A1, A2, A3, A4 |
| 1 | Conn_02x08_Top_Bottom | PinHeader_2x08_P2.54mm_Vertical | J1 |
| 1 | DX07S016JA1R1500 | JAE_DX07S016JA1R1500 | J2 |
| 1 | MICROMOD-2222-C | TE_Connectivity-2199230-4-Handsolder | J3 |
| 1 | Pin Head 50mil | PinHeader_2x05_P1.27mm_Vertical | J4 |
| 1 | I2C | PinHeader_1x04_P2.54mm_Vertical | J5 |
| 2 | Screw_Term 100mil 1x2 | TerminalBlock_Phoenix_MPT-0,5-2-2.54_1x02_P2.54mm_Horizontal | J6, J11 |
| 2 | Screw_Terminal_01x04 | TerminalBlock_Phoenix_MPT-0,5-4-2.54_1x04_P2.54mm_Horizontal | J7, J9 |
| 1 | Screw_Term 100mil 1x4 | TerminalBlock_Phoenix_MPT-0,5-4-2.54_1x04_P2.54mm_Horizontal | J8 |
| 1 | Screw Term 100mil 1x4 | TerminalBlock_Phoenix_MPT-0,5-4-2.54_1x04_P2.54mm_Horizontal | J10 |
| 1 | B3U1000P | SW_SPST_B3U-1000P | SW1 |
| 1 | SW_Push | SW_SPST_B3U-1000P | SW2 |
| 1 | LED_0805 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D1 |
| 1 | 1u | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C1 |
| 1 | 470p | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C2 |
| 1 | 2u2 | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C3 |
| 4 | 47u | CP_Axial_L10.0mm_D4.5mm_P15.00mm_Horizontal | C4, C5, C6, C7 |
| 2 | 5k1 | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R1, R2 |
Show 2 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | 2k2 | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R3, R4 |
| 1 | 1k | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R5 |
MmStep design files
The KiCad project lives in the luni64/mmStep repository on GitHub; these links point at the commit this page was built from.
- LayoutKiCad/mmStep.kicad_pcb
MmStep: common questions
How big is the MmStep PCB?
The MmStep measures 81 × 49 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the MmStep?
32 components, from 22 distinct parts. The full bill of materials is listed on this page.
Where can I download the MmStep design files?
From the luni64/mmStep repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the MmStep design in my own project?
Yes, under the terms of its MIT license, which luni64 chose for the repository.
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