Stencil
About the Stencil PCB
Stencil is an open source ESP32 PCB design by fujiy, published on GitHub. It is a 2-layer board measuring 44 × 40 mm, with 54 components from 28 distinct parts.
Its main chip is the ESP32-H2-MINI-1, from the ESP32 family. Other key parts include the TLP291, HV9961LG-G and TLV70033_SOT23-5. By type, the board carries 13 connectors, 12 diodes, 8 capacitors, 8 resistors, 6 ICs and 2 transistors.
Main components on the Stencil
Stencil bill of materials (BOM)
54 components, 28 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | TLP291 | SOIC-4_4.55x2.6mm_P1.27mm | U1, U3 |
| 2 | HV9961LG-G | SOIC-8_3.9x4.9mm_P1.27mm | U2, U4 |
| 1 | ESP32-H2-MINI-1 | ESP32-C6-MINI-1 | U5 |
| 1 | TLV70033_SOT23-5 | SOT-23-5 | U6 |
| 2 | Q_NMOS_GDS | TO-252-2 | Q1, Q2 |
| 2 | Conn_01x01_Pin | PinHeader_1x01_P2.54mm_Vertical | J1, J6 |
| 1 | USB_B_Micro | USB_Micro-B_Molex-105017-0001 | J2 |
| 2 | Conn_01x02_Pin | SolderWire-1sqmm_1x02_P5.4mm_D1.4mm_OD2.7mm | J3, J4 |
| 1 | Conn_01x02_Pin | PinSocket_1x02_P2.54mm_Vertical | J5 |
| 7 | Conn_01x01_Pin | SolderWirePad_1x01_SMD_2x4mm | J7, J8, J9, J10, J11, J12, J13 |
| 1 | Fuse | Fuseholder_Littelfuse_Nano2_157x | F1 |
| 1 | Varistor | R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | RV1 |
| 1 | Thermistor_NTC | R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | TH1 |
| 1 | 800V0.8A | Diode_Bridge_B1005S | D1 |
| 2 | D | D_SOD-123 | D2, D3 |
| 9 | LED | S1S0-3030 | D4, D5, D6, D7, D8, D9, D10, D11 +1 |
| 1 | 1mH0.7A | L_Neosid_SM-NE127_HandSoldering | L2 |
| 1 | 1mH | L_Neosid_SM-NE127_HandSoldering | L3 |
| 1 | 250V0.22uF | C_1210_3225Metric_Pad1.33x2.70mm_HandSolder | C1 |
| 4 | 1uF | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C2, C4, C6, C8 |
Show 8 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 200V 22uF | CP_Radial_D10.0mm_P5.00mm | C3 |
| 1 | 50V10uF | C_1210_3225Metric_Pad1.33x2.70mm_HandSolder | C5 |
| 1 | 10uF | C_1210_3225Metric_Pad1.33x2.70mm_HandSolder | C7 |
| 2 | 1k | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1, R3 |
| 1 | R | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R2 |
| 2 | 100k | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R4, R7 |
| 2 | 1.5 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5, R10 |
| 1 | 10k | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R6 |
Stencil design files
The KiCad project lives in the fujiy/Home repository on GitHub; these links point at the commit this page was built from.
Stencil: common questions
What microcontroller does the Stencil use?
The Stencil is built around the ESP32-H2-MINI-1, from the ESP32 family.
How big is the Stencil PCB?
The Stencil measures 44 × 40 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Stencil?
54 components, from 28 distinct parts. The full bill of materials is listed on this page.
Where can I download the Stencil design files?
From the fujiy/Home repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Stencil design in my own project?
The repository has no license, so all rights stay with fujiy. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Stencil 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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