Safestep
About the Safestep PCB
Safestep is an open source ESP32 PCB design by 8-BitLab, published on GitHub. It is a 2-layer board measuring 60.4 × 60.4 mm, with 45 components from 32 distinct parts.
Its main chip is the ESP32-C3-MINI-1-N4X, from the ESP32 family. Other key parts include the XC6206PxxxMR, TPS2121RUXR, LTC4054ES5-4.2#TRMPBF and USBLC6-2SC6. By type, the board carries 19 resistors, 11 capacitors, 5 ICs, 3 connectors, 1 switch and 1 diode.
Main components on the Safestep
Safestep bill of materials (BOM)
45 components, 32 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | XC6206PxxxMR | SOT-23-3 | U1 |
| 1 | TPS2121RUXR | RUX0012A | U2 |
| 1 | ESP32-C3-MINI-1-N4X ESP32-C3-MINI-1 | ESP32-C3-MINI-1 | U3 |
| 1 | LTC4054ES5-4.2#TRMPBF TP4054 | TSOT-23-5 | U4 |
| 1 | USBLC6-2SC6 | SOT-23-6 | U6 |
| 1 | S2B-PH-K-S Li-Po 402025 | JST_PH_S2B-PH-K_1x02_P2.00mm_Horizontal | J2 |
| 1 | S2B-PH-K-S 3 x LR44 | JST_PH_S2B-PH-K_1x02_P2.00mm_Horizontal | J3 |
| 1 | USB4105-GF-A USB-C | USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J7 |
| 1 | 3.3v | TestPoint_THTPad_2.0x2.0mm_Drill1.0mm | 3v1 |
| 1 | GRM033R61A104KE15D 100nF | C_0201_0603Metric | CBUS1 |
| 1 | GND | TestPoint_THTPad_2.0x2.0mm_Drill1.0mm | GND1 |
| 1 | Rx | TestPoint_THTPad_2.0x2.0mm_Drill1.0mm | RX1 |
| 1 | TL3342F160QG | TL3342F160QG | S1 |
| 1 | Tx | TestPoint_THTPad_2.0x2.0mm_Drill1.0mm | TX1 |
| 1 | IN-S128TATRGB LED_RGBA | LED_RGB_1210 | D2 |
| 2 | TAJB476K010RNJ 47µF | CP_EIA-1608-08_AVX-J | C1, C6 |
| 1 | GRM188R61A106ME69D 10μF | C_0201_0603Metric | C2 |
| 1 | GRM033R61A104KE15D 0.1μF | C_0201_0603Metric | C3 |
| 1 | GRM033R61A104KE15D 100nF | C_0201_0603Metric | C4 |
| 2 | GRM188R61A106ME69D 10µF | C_0201_0603Metric | C5, C10 |
Show 12 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | GRM188R61A106ME69D 1μF | C_0201_0603Metric | C7 |
| 1 | GRM033R61A104KE15D 1μF | C_0201_0603Metric | C8 |
| 2 | GRM188R61A106ME69D 0.1µF | C_0201_0603Metric | C9, C13 |
| 1 | RC0201FR-0768RL 68Ω | R_0201_0603Metric | R1 |
| 2 | RC0201FR-0733RL 33Ω | R_0201_0603Metric | R2, R3 |
| 7 | RC0603FR-0710KL 10kΩ | R_0201_0603Metric | R5, R7, R8, R19, R20, R26, R27 |
| 2 | RC0201FR-0722RL 22 Ω | R_0201_0603Metric | R9, R18 |
| 2 | RC0603FR-075K1L 5.1kΩ | R_0201_0603Metric | R11, R12 |
| 2 | RC0603FR-07330RL 330Ω | R_0201_0603Metric | R16, R17 |
| 1 | RC0603FR-0710KL 30kΩ | R_0201_0603Metric | R23 |
| 1 | RC0603FR-0710KL 51kΩ | R_0201_0603Metric | R24 |
| 1 | RC0603FR-0710KL 14kΩ | R_0201_0603Metric | R25 |
Safestep design files
The KiCad project lives in the 8-BitLab/safestep repository on GitHub; these links point at the commit this page was built from.
Safestep: common questions
What microcontroller does the Safestep use?
The Safestep is built around the ESP32-C3-MINI-1-N4X, from the ESP32 family.
How big is the Safestep PCB?
The Safestep measures 60.4 × 60.4 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Safestep?
45 components, from 32 distinct parts. The full bill of materials is listed on this page.
Where can I download the Safestep design files?
From the 8-BitLab/safestep repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Safestep design in my own project?
The repository has no license, so all rights stay with 8-BitLab. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Safestep without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.
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