Frontend
About the Frontend PCB
Frontend is an open source ESP32 PCB design by bullestock, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 63.6 × 49 mm, with 52 components from 29 distinct parts.
Its main chip is the ESP32-WROOM-32, from the ESP32 family. Other key parts include the AP1117-33, MAX485E and DSN-MINI-360. By type, the board carries 20 resistors, 9 connectors, 6 diodes, 6 capacitors, 4 ICs and 3 transistors.
From the project
Rewrite of Access Control System in Django
Main components on the Frontend
Frontend bill of materials (BOM)
52 components, 29 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ESP32-WROOM-32 | ESP32-WROOM-32U | U1 |
| 1 | AP1117-33 | SOT-223-3_TabPin2 | U2 |
| 1 | MAX485E | SOIC-8_3.9x4.9mm_P1.27mm | U3 |
| 1 | DSN-MINI-360 | DSN-MINI-360 | U4 |
| 2 | MMBT3904 | SOT-23 | Q1, Q2 |
| 1 | BSS138 | SOT-23 | Q3 |
| 1 | Ext | PinHeader_1x04_P2.54mm_Vertical | J1 |
| 4 | Conn_01x02 | JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J2, J7, J8, J9 |
| 1 | Display4020 | PinHeader_1x09_P2.54mm_Vertical | J3 |
| 1 | Debug | PinHeader_1x06_P2.54mm_Vertical | J4 |
| 1 | RS485 | JST_XH_B4B-XH-A_1x04_P2.50mm_Vertical | J5 |
| 1 | Conn_01x04 | JST_XH_B4B-XH-A_1x04_P2.50mm_Vertical | J6 |
| 1 | G6B-1114C-US5DC | DIL-relay | K1 |
| 2 | SW_SPST | SW_SPST_CK_RS282G05A3 | SW1, SW2 |
| 1 | TestPoint | TestPoint_Keystone_5000-5004_Miniature | TP1 |
| 2 | MBRA210LT3 | D_SMA | D1, D3 |
| 1 | 1N4148 | D_MiniMELF | D2 |
| 3 | LED | LED_0603_1608Metric | D4, D5, D6 |
| 3 | 100n | C_0603_1608Metric | C1, C2, C3 |
| 1 | 1u | C_0603_1608Metric | C4 |
Show 9 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 10u | C_0603_1608Metric | C5 |
| 1 | 220u | CP_EIA-6032-28_Kemet-C | C6 |
| 3 | 1k2 | R_0603_1608Metric | R1, R4, R18 |
| 2 | 2k2 | R_0603_1608Metric | R2, R5 |
| 1 | 120 | R_0603_1608Metric | R3 |
| 6 | 1k | R_0603_1608Metric | R6, R7, R8, R9, R14, R19 |
| 6 | 10k | R_0603_1608Metric | R10, R11, R12, R13, R16, R20 |
| 1 | 4R7 | R_0603_1608Metric | R15 |
| 1 | 2k7 | R_0603_1608Metric | R17 |
Frontend design files
The KiCad project lives in the bullestock/acsv2 repository on GitHub; these links point at the commit this page was built from.
Frontend: common questions
What microcontroller does the Frontend use?
The Frontend is built around the ESP32-WROOM-32, from the ESP32 family.
How big is the Frontend PCB?
The Frontend measures 63.6 × 49 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Frontend?
52 components, from 29 distinct parts. The full bill of materials is listed on this page.
Where can I download the Frontend design files?
From the bullestock/acsv2 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Frontend design in my own project?
Yes, under the terms of its GPL-3.0 license, which bullestock chose for the repository.
Can I test firmware for the Frontend 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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