SW32
About the SW32 PCB
SW32 is an open source PCB design by saawsm, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 109.2 × 48.3 mm, with 81 components from 63 distinct parts.
Other key parts include the C111212. By type, the board carries 35 resistors, 15 capacitors, 12 transistors, 9 diodes, 4 transformers and 3 connectors.
It belongs with the power & battery and iot & wireless designs in this gallery.
From the project
A 4-channel E-Stim.
This project is a work in-progress. Changes to the design might occur. Order PCBs at your own risk..
The SW32 is a 4-channel E-Stim box based around the MK312 box. Focusing on a modern and compact redesign. It supports USB Type-C PD charging with a variety of batteries such as Li-Ion, Li-Poly, or Lead Acid.
Controlling and interacting with the box can be achieved in numerous ways. Such as the front panel controls, USB, Bluetooth/A2DP, or via Wi-Fi using the internally hosted web app.
Main components on the SW32
SW32 bill of materials (BOM)
81 components, 63 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | C111212 TPS5430DDA | TI_SO-PowerPAD-8_ThermalVias | U1 |
| 1 | C111212 LM324DT | SOIC-14_3.9x8.7mm_P1.27mm | U2 |
| 1 | C461075 IRF9Z24NPBF | TO-220-3_Vertical | Q1 |
| 2 | C20917 AO3400A | SOT-23 | Q2, Q8 |
| 3 | C2876535 AO3400A | SOT-23 | Q3, Q5, Q6 |
| 1 | C2876535 IRF9Z24NPBF | TO-220-3_Vertical | Q4 |
| 1 | C111356 IRF9Z24NPBF | TO-220-3_Vertical | Q7 |
| 1 | C461075 AO3400A | SOT-23 | Q9 |
| 1 | C15127 IRF9Z24NPBF | TO-220-3_Vertical | Q10 |
| 2 | AO3400A | SOT-23 | Q11, Q12 |
| 1 | C2765186 DRV_PWR | PinHeader_1x05_P2.54mm_Vertical | J1 |
| 1 | DRV | PinHeader_2x08_P2.54mm_Vertical | J2 |
| 1 | CH_OUT | PinSocket_1x12_P2.54mm_Vertical | J3 |
| 4 | 42TL004/42TU200 | 42TL_TU | T1, T2, T3, T4 |
| 1 | C1974707 SS34 | D_SMA | D1 |
| 1 | C391441 SMAJ13A | D_SMA | D2 |
| 2 | C2128 BAV23CL | SOT-23-3 | D3, D5 |
| 2 | C2128 SMAJ13A | D_SMA | D4, D6 |
| 1 | C2286 BAV23CL | SOT-23-3 | D7 |
| 1 | C2500 SMAJ13A | D_SMA | D8 |
Show 43 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | C2500 BAV23CL | SOT-23-3 | D9 |
| 1 | C540967 15uH | L_CJIANG_FXL0630 | L1 |
| 2 | C1664 22uF | C_0805_2012Metric | C1, C2 |
| 1 | C96446 22uF | C_0805_2012Metric | C3 |
| 1 | C15849 10nF | C_0603_1608Metric | C4 |
| 1 | C14663 220uF | CP_Radial_D8.0mm_P3.50mm | C5 |
| 1 | C96446 1uF | C_0603_1608Metric | C6 |
| 1 | C440198 100nF | C_0603_1608Metric | C7 |
| 1 | C1663 220uF | CP_Radial_D8.0mm_P3.50mm | C8 |
| 1 | C14858 100nF | C_0603_1608Metric | C9 |
| 3 | C440198 220uF | CP_Radial_D8.0mm_P3.50mm | C10, C12, C14 |
| 1 | C318642 100nF | C_0603_1608Metric | C11 |
| 1 | C30816 100nF | C_0603_1608Metric | C13 |
| 1 | C1644 100nF | C_0603_1608Metric | C15 |
| 1 | C25804 100k | R_0603_1608Metric | R1 |
| 3 | C25804 10k | R_0603_1608Metric | R2, R4, R29 |
| 1 | C25804 1.5k | R_0603_1608Metric | R3 |
| 1 | C25803 10k | R_0603_1608Metric | R5 |
| 1 | C21190 2k | R_0603_1608Metric | R6 |
| 1 | C21190 1k | R_0603_1608Metric | R7 |
| 1 | C21190 100k | R_0603_1608Metric | R8 |
| 1 | C21190 100 | R_0603_1608Metric | R9 |
| 3 | C25803 100k | R_0603_1608Metric | R10, R16, R32 |
| 1 | C25804 100 | R_0603_1608Metric | R11 |
| 1 | C31850 10k | R_0603_1608Metric | R12 |
| 1 | C17901 10k | R_0603_1608Metric | R13 |
| 1 | C25803 2k | R_0603_1608Metric | R14 |
| 1 | C31850 1k | R_0603_1608Metric | R15 |
| 1 | C17944 100 | R_0603_1608Metric | R17 |
| 1 | C22765 100k | R_0603_1608Metric | R18 |
| 1 | C23153 100 | R_0603_1608Metric | R19 |
| 1 | C23254 10k | R_0603_1608Metric | R20 |
| 1 | C23024 10k | R_0603_1608Metric | R21 |
| 1 | C22961 2k | R_0603_1608Metric | R22 |
| 2 | C25804 1k | R_0603_1608Metric | R23, R31 |
| 1 | C137704 100k | R_0603_1608Metric | R24 |
| 1 | C844910 100 | R_0603_1608Metric | R25 |
| 1 | C22859 100k | R_0603_1608Metric | R26 |
| 1 | C137704 100 | R_0603_1608Metric | R27 |
| 1 | C22859 10k | R_0603_1608Metric | R28 |
| 1 | C22967 2k | R_0603_1608Metric | R30 |
| 2 | C22859 100 | R_0603_1608Metric | R33, R35 |
| 1 | C844910 100k | R_0603_1608Metric | R34 |
SW32 design files
The KiCad project lives in the saawsm/SW32 repository on GitHub; these links point at the commit this page was built from.
SW32: common questions
How big is the SW32 PCB?
The SW32 measures 109.2 × 48.3 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the SW32?
81 components, from 63 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the SW32 design files?
From the saawsm/SW32 repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the SW32 design in my own project?
Yes, under the terms of its GPL-3.0 license, which saawsm chose for the repository.
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