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2 layers75 × 99.1 mmEsp32rfid, the printed circuit board in 3D

Esp32rfid

nykloo/esp32rfid_pcb6

ESP32 rfid reader/writer using the EM4095 chip

Open in PCBKitView on GitHub.kicad_pcb
Size
75 × 99.1 mm
Copper layers
2
Thickness
1.6 mm
Parts
32
Nets
50
Pads
138
Tracks, vias
389, 34
Pours
2
Routed
Yes
KiCad
KiCad 6 (file 20211014)
Created
13 Sep 2022
Updated
18 Jul 2023

Overview

Esp32rfid is an open-source printed circuit board by nykloo, from the nykloo/esp32rfid_pcb repository on GitHub. It is a 2-layer board of 75 × 99.1 mm with 32 parts on 50 nets, routed with 389 tracks and 34 vias.

It is built around the EM4095HMS and ESP32-WROOM-32. Its parts include 3 ICs, 2 capacitors and 1 connector. It belongs with the radio and wireless boards and the ESP32 boards of this library.

Main components

2

README

readme.md

ESP32 rfid circuit

125khz rfid reader/writer for EM4x chips

Works for kyber crystals

Firmware

https://github.com/nykloo/ESP32RFID-Firmware

Control App

https://github.com/nykloo/ESP32RFID-App

IMPORTANT NOTES

  • C_RESA1, C_RESB1,C_DV1, C_DV2 should be fairly close to their intended values (ie use capicitors with a tolerance of less than 5%) Alternatively the optional capacitors can be used to more tune the resonate frequency of the antenna circuit.
  • The PCB coil antenna is designed to printed on a pcb with thickness of 1mm and outer copper weight of 1 oz. I have been ordering these from jlc pcb.

Schematic

pcb schematic

PCB

pcb design

Assembly

pcb design

Parts

32
QtyValueFootprintReferences
4MountingHole_2.1mmMountingHole:MountingHole_2.1mmm2a, m2b, m2c, m2d
2100nfCapacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolderC_AGND1, C_DEC1
210ufCapacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolderC_REG1, C_REG2
212kResistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolderRMOD1, RSHD_PUP1
25k1Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolderR_2, R_4
2optionalCapacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolderC_DV3, C_RESC1
10.1nfCapacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolderC_DV1
10.1ufCapacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolderC1
1100ufCapacitor_SMD:CP_Elec_8x10.5C_Big1
110NFCapacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolderC_DC1
110nfCapacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolderC_FCAP1
112KResistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolderR_1
11ufCapacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolderC2
12.2nfCapacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolderC_RESA1
13.6nfCapacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolderC_DV2
1470Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolderR_3
1470pfCapacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolderC_RESB1
1Coil Antennapcb_inductors:60_turn_square_inductor_correctedL_ANT1
1Conn_01x03Connector:FanPinHeader_1x03_P2.54mm_VerticalJLED1
1Conn_01x16_MaleConnector_PinHeader_2.54mm:PinHeader_1x16_P2.54mm_VerticalJ1
1EM4095MyLib:SOIC127P602X173-16NIC1
1ESP32-WROOM-32RF_Module:ESP32-WROOM-32U1
1NCP1117-3.3_SOT223Package_TO_SOT_SMD:SOT-223-3_TabPin2U2
1USB_B_MicroConnector_USB:USB_Micro-B_Molex_47346-0001J_POWER1

Questions

How big is the Esp32rfid PCB?

It measures 75 × 99.1 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Esp32rfid use?

32 parts, built around the EM4095HMS and ESP32-WROOM-32. 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 Esp32rfid KiCad files?

From the nykloo/esp32rfid_pcb repository on GitHub, at the commit this page was made from: the board is esp32rfid.kicad_pcb and its schematic esp32rfid.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Esp32rfid design in my own project?

Its repository states no licence, so its author keeps all rights: ask nykloo before reusing the design.

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