PCB V2
About the PCB V2
PCB V2 is an open source ESP32 PCB design by BhoumikAcharya, published on GitHub. It is a 2-layer board measuring 94.5 × 75.6 mm, with 161 components from 69 distinct parts.
Its main chip is the ESP32-WROOM-32E-N4, from the ESP32 family. Other key parts include the CH340X(MSOP-10), LAN8710A-EZC(QFN32), AMS1117-3.3, ACS712xLCTR-20A and MP1584EN. By type, the board carries 61 resistors, 40 capacitors, 18 diodes, 10 ICs, 6 connectors and 5 transistors.
Main components on the PCB V2
PCB V2 bill of materials (BOM)
161 components, 69 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ESP32-WROOM-32E-N4 | ESP32-WROVER_MODULE | U1 |
| 1 | CH340X(MSOP-10) | MSOP-10_Pitch-0.5mm_3.00x3.00x1.00mm | U2 |
| 1 | LAN8710A-EZC(QFN32) | QFN32_EP(33)_5.00x5.00x0.90mm_Pitch_0.50mm | U3 |
| 1 | AMS1117-3.3 | SOT-223-3_TabPin2 | U4 |
| 3 | ACS712xLCTR-20A | SOIC-8_3.9x4.9mm_P1.27mm | U5, U6, U7 |
| 3 | MP1584EN | SOIC-8_L4.9-W3.9-P1.27-LS6.0-BL-EP3.3 | U8, U9, U10 |
| 2 | BC817-40(SOT23) | SOT23 | Q1, Q2 |
| 3 | BC846 | SOT-23 | Q3, Q4, Q5 |
| 1 | PSU_I/P | TerminalBlock_Phoenix_MKDS-1,5-2-5.08_1x02_P5.08mm_Horizontal | J1 |
| 1 | Battery_I/P | TerminalBlock_Phoenix_MKDS-1,5-2-5.08_1x02_P5.08mm_Horizontal | J2 |
| 1 | LEDs Ground | TerminalBlock_Phoenix_MKDS-1,5-3_1x03_P5.00mm_Horizontal | J3 |
| 1 | Relay_1_Terminal | TerminalBlock_Phoenix_MKDS-1,5-3-5.08_1x03_P5.08mm_Horizontal | J4 |
| 1 | Relay_2_Terminal | TerminalBlock_Phoenix_MKDS-1,5-3-5.08_1x03_P5.08mm_Horizontal | J5 |
| 1 | Relay_3_Terminal | TerminalBlock_Phoenix_MKDS-1,5-3-5.08_1x03_P5.08mm_Horizontal | J6 |
| 2 | IT1185AU2 | IT1185AU2_V2 | BUT1, RST1 |
| 1 | WPM2015-3/TR | SOT23 | FET1 |
| 3 | FINDER-34.51.7xxx.x019 | Relay_SPDT_Finder_34.51_Horizontal | K1, K2, K3 |
| 1 | RJP-003TC1(LPJ4112CNL) | RJP-003TC1(LPJ4112CNL) | LAN_CON1 |
| 2 | RA1206_(4X0603)_4B8_2.2k | R_MATRIX_4 | RM1, RM2 |
| 1 | LMUN2211LT1G(SOT-23) | SOT23 | T1 |
Show 49 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ESDS314DBVR(SOT-23-5) | SOT-23-5 | TVS1 |
| 2 | NA(GG0402052R542P) | D_0402_5MIL_DWS | TVS2, TVS3 |
| 1 | MISB-SWMM-5B-LF(USB_MICRO) | USB-MICRO_MISB-SWMM-5B_LF | USB-UART1 |
| 1 | LED/YELLOW/0603 | LED_0603_KA | ACT1 |
| 1 | LED/GREEN/0603 | LED_0603_KA | LNK1 |
| 3 | 1N5819S4(SOD-123) | SOD-123_1C-2A_KA | D1, D2, D3 |
| 1 | BAT54C(SOT23-3) | SOT23-3 | D4 |
| 1 | SS54 | D_SMC | D5 |
| 7 | LED | LED_0805_2012Metric | D6, D7, D8, D12, D13, D14, D15 |
| 3 | M7 | D_SMA | D9, D10, D11 |
| 3 | ~ | D_SMA_Handsoldering | D16, D17, D18 |
| 2 | FB0805/600R/2A | L_0805_5MIL_DWS | L1, L2 |
| 3 | 6.8uH | L_6.3x6.3_H3 | L4, L5, L6 |
| 4 | 22uF/6.3V/20%/X5R/C0603 | C_0603_5MIL_DWS | C1, C3, C5, C9 |
| 1 | 1uF/10V/20%/X5R/C0603 | C_0603_5MIL_DWS | C2 |
| 6 | 100nF/10V/20%/X5R/C04020 | C_0402_5MIL_DWS | C4, C7, C8, C10, C11, C13 |
| 1 | 1nF/2000V/10%/X7R/C1206 | C_1206_5MIL_DWS_ISO | C6 |
| 1 | 2.2uF/6.3V/10%/X5R/C0603 | C_0603_5MIL_DWS | C12 |
| 1 | NA(10uF/6.3V/20%/X5R/C0603) | C_0603_5MIL_DWS | C14 |
| 1 | 10uF | C_0805_2012Metric | C15 |
| 3 | 100nF | C_0805_2012Metric | C16, C17, C18 |
| 3 | 1nF | C_0805_2012Metric | C19, C20, C21 |
| 1 | 22uF | C_0805_2012Metric | C22 |
| 6 | 10uF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C25, C26, C31, C32, C37, C38 |
| 3 | 100nF | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C27, C33, C39 |
| 3 | 220pF | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C28, C34, C40 |
| 6 | 22uF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C29, C30, C35, C36, C41, C42 |
| 6 | 10k/R0402 | R_0402_5MIL_DWS | R1, R2, R8, R9, R19, R22 |
| 3 | 1k/R0402 | R_0402_5MIL_DWS | R3, R13, R14 |
| 4 | 49.9R/1%/R0402 | R_0402_5MIL_DWS | R4, R5, R6, R7 |
| 3 | 2.2k/R0402 | R_0402_5MIL_DWS | R10, R11, R17 |
| 1 | 4.7k/R0402 | R_0402_5MIL_DWS | R12 |
| 2 | NA/R0402 | R_0402_5MIL_DWS | R15, R23 |
| 2 | 220R/R0402 | R_0402_5MIL_DWS | R16, R21 |
| 1 | NA(10k/R0402) | R_0402_5MIL_DWS | R18 |
| 1 | 12.1k/1%/R0402 | R_0402_5MIL_DWS | R20 |
| 5 | 2.2k | R_0805_2012Metric | R24, R25, R26, R31, R33 |
| 3 | 3.3k | R_0805_2012Metric | R27, R28, R29 |
| 2 | 10k | R_0805_2012Metric | R30, R32 |
| 3 | 300 | R_0603_1608Metric | R34, R35, R36 |
| 3 | 1k | R_0603_1608Metric | R37, R38, R39 |
| 2 | 140k | R_0603_1608Metric | R40, R42 |
| 3 | 10k | R_0603_1608Metric | R41, R43, R45 |
| 1 | 52.3k | R_0603_1608Metric | R44 |
| 4 | 1k | R_0805_2012Metric | R46, R47, R48, R49 |
| 3 | 100k | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R50, R54, R58 |
| 3 | 24.9k | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R51, R55, R59 |
| 3 | 200k | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R52, R56, R60 |
| 3 | 68.1k | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R53, R57, R61 |
PCB V2 design files
The KiCad project lives in the BhoumikAcharya/smart-signage-boards repository on GitHub; these links point at the commit this page was built from.
PCB V2: common questions
What microcontroller does the PCB V2 use?
The PCB V2 is built around the ESP32-WROOM-32E-N4, from the ESP32 family.
How big is the PCB V2?
The PCB V2 measures 94.5 × 75.6 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the PCB V2?
161 components, from 69 distinct parts. The full bill of materials is listed on this page.
Where can I download the PCB V2 design files?
From the BhoumikAcharya/smart-signage-boards repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the PCB V2 design in my own project?
The repository has no license, so all rights stay with BhoumikAcharya. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the PCB V2 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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