${title}
About the ${title} PCB
${title} is an open source ESP32 PCB design by hanebefl, published on GitHub. It is a 4-layer board measuring 132.5 × 82 mm, with 91 components from 45 distinct parts.
Its main chip is the ESP32-C3-WROOM-02, from the ESP32 family. Other key parts include the SIM800L, BQ24090DGQ, LT1170CT, USBLC6-2SC6 and TPS73633DBV. By type, the board carries 35 resistors, 20 capacitors, 15 transistors, 6 ICs, 4 diodes and 3 connectors.
From the project
GSM conversion for a old German Wandfernsprecher telephone
This project uses a SIM800L GSM module, and is controlled by a ESP32-C3 running Micropython.
Main components on the ${title}
${title} bill of materials (BOM)
91 components, 45 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | SIM800L | SIM800L-module | U1 |
| 1 | ESP32-C3-WROOM-02 | ESP32-C3-WROOM-02 | U2 |
| 1 | BQ24090DGQ | HVSSOP-10-1EP_3x3mm_P0.5mm_EP1.57x1.88mm_ThermalVias | U3 |
| 1 | LT1170CT | TO-220-5_P3.4x3.7mm_StaggerOdd_Lead3.8mm_Vertical | U4 |
| 1 | USBLC6-2SC6 | SOT-23-6 | U5 |
| 1 | TPS73633DBV | SOT-23-5 | U8 |
| 3 | AO3400A | SOT-23 | Q1, Q11, Q15 |
| 4 | 2N5551 | TO-92_HandSolder | Q2, Q3, Q4, Q6 |
| 2 | 2N5401 | TO-92_HandSolder | Q5, Q7 |
| 4 | AO3401A | SOT-23 | Q8, Q10, Q12, Q14 |
| 2 | BC857BS | SOT-363_SC-70-6 | Q9, Q13 |
| 1 | Hörer | CONN_01x04_vertical_mod | J1 |
| 1 | Vin | JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical | J2 |
| 1 | Conn_01x04 | PinHeader_1x04_P2.54mm_Vertical | J3 |
| 1 | Battery_Cell | JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical | BT1 |
| 1 | Erdschalter | CONN_01x04_vertical_mod | ES1 |
| 1 | Gabelschalter | Gabelschalter | GS1 |
| 1 | ~ | CONN_01x04_vertical_mod | NS1 |
| 1 | SW_SPST | JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical | SW3 |
| 1 | BOOT | SW_PUSH_6mm | SW4 |
Show 25 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | MBRS1100T3 | D_SMB_Handsoldering | D1 |
| 1 | GRN | LED_0805_2012Metric | D2 |
| 1 | YEL | LED_0805_2012Metric | D3 |
| 1 | 5.1V | D_SOD-123 | D4 |
| 1 | ~ | CONN_01x02_vertical_mod | L1 |
| 1 | L | L_Radial_D12.5mm_P7.00mm_Fastron_09HCP | L2 |
| 8 | 100nF | C_0603_1608Metric | C1, C2, C3, C4, C5, C10, C11, C16 |
| 4 | 1µF | C_0603_1608Metric | C6, C7, C18, C20 |
| 2 | 10µF | C_0603_1608Metric | C8, C19 |
| 1 | 10nF | C_0603_1608Metric | C9 |
| 1 | 100µF | CP_Radial_D10.0mm_P5.00mm | C12 |
| 1 | 1µF | C_1210_3225Metric_Pad1.33x2.70mm_HandSolder | C13 |
| 1 | 220µF | CP_Radial_D10.0mm_P5.00mm | C14 |
| 1 | 1µF | C_Rect_L18.0mm_W8.0mm_P15.00mm_FKS3_FKP3 | C15 |
| 1 | 100n | C_0603_1608Metric | C17 |
| 5 | 100 | R_0603_1608Metric | R1, R2, R3, R4, R15 |
| 12 | 10k | R_0603_1608Metric | R5, R6, R7, R9, R19, R21, R22, R24 +4 |
| 7 | 1k | R_0603_1608Metric | R8, R10, R16, R23, R26, R30, R35 |
| 2 | 2k2 | R_0603_1608Metric | R11, R12 |
| 2 | 47k | R_0603_1608Metric | R13, R14 |
| 1 | 68k | R_0603_1608Metric | R17 |
| 1 | 1k8 | R_0603_1608Metric | R18 |
| 1 | 12k | R_0603_1608Metric | R20 |
| 3 | 1k6 | R_0603_1608Metric | R28, R32, R33 |
| 1 | 820 | R_0603_1608Metric | R29 |
${title} design files
The KiCad project lives in the hanebefl/wandfernsprecher-hw repository on GitHub; these links point at the commit this page was built from.
${title}: common questions
What microcontroller does the ${title} use?
The ${title} is built around the ESP32-C3-WROOM-02, from the ESP32 family.
How big is the ${title} PCB?
The ${title} measures 132.5 × 82 mm, has 4 copper layers and is 1.6062 mm thick.
How many components are on the ${title}?
91 components, from 45 distinct parts. The full bill of materials is listed on this page.
Where can I download the ${title} design files?
From the hanebefl/wandfernsprecher-hw repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the ${title} design in my own project?
The repository has no license, so all rights stay with hanebefl. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the ${title} 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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