2 layers63.6 × 49 mm
11 layers58 × 31.9 mm
Reader
bullestock/acsv22Rewrite of Access Control System in Django
- Size
- 58 × 31.9 mm
- Copper layers
- 11
- Thickness
- 1.6 mm
- Parts
- 34
- Nets
- 51
- Pads
- 127
- Tracks, vias
- 208, 18
- Pours
- 5
- Routed
- Yes
- KiCad
- KiCad 8.99 (file 20240706)
- Created
- 14 Jul 2021
- Updated
- 26 Sep 2026
Overview
Reader is an open-source printed circuit board by bullestock, from the bullestock/acsv2 repository on GitHub, published under the GPL-3.0 licence. It is an 11-layer board of 58 × 31.9 mm with 34 parts on 51 nets, routed with 208 tracks and 18 vias.
It is built around the ESP32-WROOM-32U, MAX485ED and RS485, with the AMS1117-3.3 and MMBT3904 among its other parts. Its parts include 13 resistors, 6 capacitors, 4 ICs, 4 diodes and 2 transistors. It belongs with the ESP32 boards of this library.
Main components
5
ESP32-WROOM-32U
SMD,19.2x18mm-40℃~+85℃ -97dBm 2.4GHz 20.5dBm 3V~3.6V Bluetooth4.2 ESP32-DOWD UART、SDIO、SPI、I2C、GPIO、PWM、ADC、DAC、CAN SMD,19.2x18mm WiFi Modules ROHSEspressif SystemsWiFi Modules
MAX485ED
SOP-8-40℃~+85℃ 1 1 1mA 32 4.75V~5.25V 5Mbps Half-Duplex Transceiver ±8kV SOP-8 RS-485 / RS-422 ICs ROHSHTCRS-485 / RS-422 ICsRS485
SOP-81 1 1.2mA 2.5Mbps 256 5V Half-Duplex Transceiver ±4kV SOP-8 RS-485 / RS-422 ICs ROHSGRRS-485 / RS-422 ICs
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
MMBT3904
SOT-23-55℃~+150℃ 1 NPN 100 100nA 200mA 200mW 300MHz 300mV 40V 6V NPN SOT-23 Bipolar (BJT) ROHSJiangsu Changjing Electronics Technology (CJ)Bipolar (BJT)
Parts
34| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 100n | Capacitor_SMD:C_0603_1608Metric | C2, C4, C5, C7 |
| 3 | 1k2 | Resistor_SMD:R_0603_1608Metric | R3, R5, R9 |
| 3 | 2k2 | Resistor_SMD:R_0603_1608Metric | R4, R6, R10 |
| 2 | 10k | Resistor_SMD:R_0603_1608Metric | R12, R13 |
| 2 | 10u | Capacitor_SMD:C_0805_2012Metric | C1, C3 |
| 2 | 270 | Resistor_SMD:R_0603_1608Metric | R1, R2 |
| 2 | 3V9 | Diode_SMD:D_MiniMELF | D3, D4 |
| 2 | LED | LED_THT:LED_D5.0mm | D1, D2 |
| 2 | MMBT3904 | Package_TO_SOT_SMD:SOT-23 | Q1, Q2 |
| 2 | SW_SPST | Button_Switch_SMD:SW_SPST_CK_RS282G05A3 | SW1, SW2 |
| 1 | 100 | Resistor_SMD:R_0603_1608Metric | R7 |
| 1 | 120 | Resistor_SMD:R_0603_1608Metric | R8 |
| 1 | 4k7 | Resistor_SMD:R_0603_1608Metric | R11 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U5 |
| 1 | Buzzer | Module:Buzzer_D22mm_H8mm_P10mm | BZ1 |
| 1 | Debug | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical | J1 |
| 1 | ESP32-WROOM-32U | RF_Module:ESP32-WROOM-32U | U1 |
| 1 | MAX485E | Housings_SOIC:SOIC-8_3.9x4.9mm_Pitch1.27mm | U3 |
| 1 | RDM6300 | Module:RDM6300_B38.5x18.2mm | U2 |
| 1 | RS485 | Connector_JST:JST_XH_S04B-XH-A_1x04_P2.50mm_Horizontal | J2 |
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Questions
How big is the Reader PCB?
It measures 58 × 31.9 mm and has 11 copper layers, 1.6 mm thick.
What parts does the Reader use?
34 parts, built around the ESP32-WROOM-32U, MAX485ED, RS485 and AMS1117-3.3. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Reader KiCad files?
From the bullestock/acsv2 repository on GitHub, at the commit this page was made from: the board is reader/esp32/pcb/reader.kicad_pcb and its schematic barn/pcb/hat/hat.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Reader design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).