Universal module
About the Universal module
Universal module is an open source ESP32 PCB design by renata7zemanova, published on GitHub. It is a 2-layer board measuring 100 × 100 mm, with 113 components from 44 distinct parts.
Its main chip is the ESP32-C3, from the ESP32 family. Other key parts include the CN3058E, LT1930, E22-900T22D, AT42QT1070-S and PCA9536D. By type, the board carries 30 resistors, 26 capacitors, 23 diodes, 11 connectors, 7 transistors and 6 ICs.
Main components on the Universal module
Universal module bill of materials (BOM)
113 components, 44 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ESP32-C3 | ESP32-C3 | U1 |
| 1 | CN3058E | SOP-8_3.76x4.96mm_P1.27mm | U2 |
| 1 | LT1930 | SOT-23-5 | U3 |
| 1 | E22-900T22D | E22-900T22D | U4 |
| 1 | AT42QT1070-S | SOIC-14_3.9x8.7mm_P1.27mm | U5 |
| 1 | PCA9536D | SOIC-8_3.9x4.9mm_P1.27mm | U6 |
| 1 | Motor_DC | PinHeader_1x02_P2.54mm_Vertical | M1 |
| 4 | Q_NMOS_GSD | SOT-23 | Q1, Q3, Q4, Q6 |
| 2 | Q_PMOS_GSD | SOT-23 | Q2, Q7 |
| 1 | Q_Photo_NPN | SMD,3.5x2.8x1.9mm | Q5 |
| 1 | USB_C_Receptacle_USB2.0 | USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J1 |
| 1 | Conn_01x02_Female | PinSocket_1x02_P1.27mm_Vertical | J2 |
| 3 | Conn_01x03_Male | PinSocket_1x03_P2.54mm_Vertical | J3, J4, J13 |
| 4 | Conn_01x04_Female | PinHeader_1x04_P2.54mm_Vertical | J5, J7, J9, J11 |
| 2 | Conn_01x06_Female | PinSocket_1x06_P2.54mm_Vertical | J6, J8 |
| 1 | Battery_Cell | battery_dock | BT1 |
| 1 | Cap_btn | Cap_btn_4x4 | BTN1_ENTER1 |
| 4 | Cap_btn | Cap_btn_1,6x1,6 | BTN2_UP1, BTN3_DOWN1, BTN4_RIGHT1, BTN5_LEFT1 |
| 1 | Buzzer | PIEZO | BZ1 |
| 1 | SW_SPDT | BTN_1101M2S2AV2QE2 | SW1 |
Show 24 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 12 | WS2812B | LED_WS2812B_PLCC4_5.0x5.0mm_P3.2mm | D1, D2, D3, D4, D5, D6, D7, D8 +4 |
| 3 | Green | LED_0603_1608Metric | D13, D15, D16 |
| 1 | Red | LED_0603_1608Metric | D14 |
| 1 | MBR0520 | D_SOD-123 | D17 |
| 3 | SD05_SOD323 | D_SOD-323 | D18, D19, D20 |
| 3 | D_Schottky | D_SOD-123 | D21, D22, D24 |
| 1 | 4u7 | L_CDRH3D18 | L1 |
| 3 | 4u7 | C_0805_2012Metric | C1, C10, C13 |
| 1 | 1u | C_0805_2012Metric | C2 |
| 1 | 100u | C_0805_2012Metric | C3 |
| 17 | 100n | C_0603_1608Metric | C4, C6, C9, C11, C12, C15, C16, C17 +9 |
| 4 | 10u | C_0805_2012Metric | C5, C7, C8, C14 |
| 1 | 47k | R_0603_1608Metric | R1 |
| 2 | 5k1 | R_0402_1005Metric | R2, R3 |
| 13 | 10k | R_0603_1608Metric | R4, R5, R7, R11, R16, R17, R18, R19 +5 |
| 3 | 1k | R_0603_1608Metric | R6, R12, R29 |
| 1 | 1k2 | R_0603_1608Metric | R8 |
| 1 | 39k | R_0603_1608Metric | R9 |
| 1 | 13k | R_0603_1608Metric | R10 |
| 1 | 150k | R_0603_1608Metric | R13 |
| 4 | 100k | R_0603_1608Metric | R14, R15, R24, R25 |
| 1 | 22k | R_0402_1005Metric | R26 |
| 1 | 10k | R_0402_1005Metric | R27 |
| 1 | 180R | R_0603_1608Metric | R28 |
Universal module design files
The KiCad project lives in the renata7zemanova/Semafor repository on GitHub; these links point at the commit this page was built from.
- LayoutHW/Semafor.kicad_pcb
- SchematicHW/Semafor.kicad_sch
Universal module: common questions
What microcontroller does the Universal module use?
The Universal module is built around the ESP32-C3, from the ESP32 family.
How big is the Universal module?
The Universal module measures 100 × 100 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Universal module?
113 components, from 44 distinct parts. The full bill of materials is listed on this page.
Where can I download the Universal module design files?
From the renata7zemanova/Semafor repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Universal module design in my own project?
The repository has no license, so all rights stay with renata7zemanova. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Universal module 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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