4 layers132.5 × 82 mm
Wandfernsprecher
hanebefl/wandfernsprecher-hw
GSM conversion for a old German Wandfernsprecher telephone
93 parts6
2 layers173.2 × 54 mm
Microcard
Volkov997/pen-card5RF Pentesting tool, but small enough for your wallet. Features: Wifi & Bluetooth, NFC, IR, (Sub Ghz, Planned)
- Size
- 173.2 × 54 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 138
- Nets
- 120
- Pads
- 439
- Tracks, vias
- 10, 0
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 26 Apr 2025
- Updated
- 28 Apr 2025
Overview
Microcard is an open-source printed circuit board by Volkov997, from the Volkov997/pen-card repository on GitHub, published under the GPL-2.0 licence. It is a 2-layer board of 173.2 × 54 mm with 138 parts on 120 nets, routed with 10 tracks and 0 vias.
It is built around the ESP32-WROOM-32UE-N4, BQ24090DGQR and DYWH-IRM-H238T/2T, with the ST25R3916-AQWT, TPS73633DBV and E6QYDD1204-PRA among its other parts. Its parts include 45 capacitors, 40 resistors, 11 diodes, 9 switches and 7 transistors. It belongs with the radio and wireless boards and the ESP32 boards of this library.
Main components
12
ESP32-WROOM-32UE-N4
SMD,19.2x18mm-40℃~+85℃ -88dBm 112mA 19.5dBm 2.4GHz 239mA 3V~3.6V Bluetooth4.2 ESP32-D0WD-V3、ESP32-D0WDR2-V3 UART、SDIO、SPI、I2C、GPIO、ADC、I2S、DAC、Ethernet、TWAI SMD,19.2x18mm WiFi Modules ROHSEspressif SystemsWiFi Modules
BQ24090DGQR
MSOP-10-EP0℃~+125℃ 1 1A 1mA 4.2V 4.45V~6.45V Charging IC Lithium Battery Support Support MSOP-10-EP Battery Management ROHSTexas InstrumentsBattery Management
DYWH-IRM-H238T/2T
SMD-4P,5.1x4.6mm-20℃~+80℃ 2.7V~5.5V 38kHz 400uA 45° SMD-4P,5.1x4.6mm Infrared Remote Receiver (IRM) ROHSTONYUInfrared Remote Receiver (IRM)
ST25R3916-AQWT
VFQFN-32(5x5)2.4V~5.5V 27.12MHz FeliCa,ISO 14443A,ISO 14443B,ISO 15693,MIFARE,NFC I2C,SPI VFQFN-32(5x5) RFID ICs ROHSSTMicroelectronicsRFID ICs
TPS73633DBV
SOT-23-5-40℃~+125℃@(Tj) 1 3.3V 30uVrms 400mA 5.5V 550uA 58dB@(10kHz) 75mV@(400mA) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown、Enable control、Reverse-polarity current protection、Noise bypass terminal Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTexas InstrumentsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
E6QYDD1204-PRA
SMD,3.2x2.1mm-40℃~+90℃ 1.3V~1.6V 120° 1mW/sr 30mA 50nm 5V 880nm SMD,3.2x2.1mm Infrared LED Emitters ROHSEKINGLUXPhototransistors
BSS138PS,115-VB
SOT-363SOT-363 MOSFETs ROHSVBsemi ElecMOSFETs
SK6812SIDE-A-RVS
SMD-4P,4x2mm-40℃~+85℃ 0.25mA 1.6mm 100ns 120° 160mcd~320mcd 2000V 200ns 240mcd~450mcd 280ns 2mm 3.7V~5.5V 460nm~475nm 4kHz 4mm 520nm~535nm 620nm~630nm 697.5mcd~1162.5mcd 800Kbit/s Built-in power-on reset circuit、Built-in one-way transmission function SMD-4P,4x2mm RGB LEDs(Built-in IC) ROHSOPSCO OptoelectronicsRGB LEDs(Built-In IC)
2450AT18A100E
1206-40℃~+125℃ 0.5dBi 1.3mm 1.6mm 2.4GHz 2W 3.2mm 50Ω Patch Antenna SMA 1206 Antennas ROHSJohanson DielectricsAntennas
BAV70W
SOT-323-31 Pair Common Cathode 1.25V@150mA 100V 175mA 200mW 4A 4ns 500nA@80V SOT-323-3 Switching Diodes ROHSNexperiaSwitching Diodes
CONMHF4-SMD-G-T
SMD-65℃~+165℃ 1 50Ω 60V 6GHz Board Side IPEX Inner pin SMD Coaxial Connectors (RF) ROHSTE ConnectivityCoaxial Connectors (RF)
HC-1.2-4PWT
SMD,P=1.2mm,卧贴-25℃~+85℃ 1 1.2mm 1.4mm 1.5A 1x4P 4 4.5mm 4P 50V 6.7mm Black Copper alloy Gold PA Pico-EZmate(MX 1.2) Surface Mount, Right Angle UL94V-0 SMD,P=1.2mm,Surface Mount，Right Angle Wire To Board Connector ROHSHCTLWire To Board Connector
README
README.mdpen-card
RF Pentesting tool,small enough for your wallet. Please see the docs for more detailed info: https://volkov997.github.io/pen-card/
Features
- ESP-32 processor with U.FL connector
- onboard 2.54GHz chip antenna with U.FL to MHF4 cable
- ST253916 NFC controller (read, write, emulate)
- IR LEDs + Reciever (38kHz)
- 0.96" OLED (might switch to a smaller one if i find one tho)
- 150mAh 3mm LiPo, max. 3uA shutdown current
The card is constructed from two stacked 1.6mm PCBs, for a full height of 3.2mm, width and height being 86mm x 54mm. Components are chosen and placed as to not stick out.
This project is WIP, and will be ordered through OnBoard once finished.
Parts
138| Qty | Value | Footprint | References |
|---|---|---|---|
| 20 | 10k | Resistor_SMD:R_0603_1608Metric | R1, R4, R5, R10, R11, R15, R17, R21, R22, R23, R24, R26, R32, R33, R34, R39 +4 |
| 11 | TBD | Capacitor_SMD:C_0402_1005Metric | C12, C15, C16, C17, C18, C21, C22, C23, C30, C35, C45 |
| 10 | 2.2uF | Capacitor_SMD:C_0603_1608Metric | C1, C2, C11, C20, C25, C27, C29, C32, C34, C37 |
| 7 | 1nF | Capacitor_SMD:C_0402_1005Metric | C19, C24, C26, C28, C31, C33, C36 |
| 5 | 1uF | Capacitor_SMD:C_0805_2012Metric | C3, C5, C6, C7, C10 |
| 5 | 2N7002 | Package_TO_SOT_SMD:SOT-23 | Q1, Q3, Q4, Q6, Q7 |
| 5 | 4k | Resistor_SMD:R_0603_1608Metric | R13, R14, R16, R27, R31 |
| 4 | TBD | Inductor_SMD:L_0402_1005Metric | L1, L2, L3, L4 |
| 3 | 160R | Resistor_SMD:R_0603_1608Metric | R28, R29, R30 |
| 3 | 47k | Resistor_SMD:R_0603_1608Metric | R3, R12, R38 |
| 3 | E6QYDD1204-PRA | LCSC:LED-SMD_L3.2-W2.1-FD_E6QYDD1204-PRA | LED3, LED4, LED5 |
| 2 | 0.1uF | Capacitor_SMD:C_0603_1608Metric | C4, C41 |
| 2 | 1uF 16V X7R | Capacitor_SMD:C_0603_1608Metric | C38, C39 |
| 2 | 2k | Resistor_SMD:R_0603_1608Metric | R18, R19 |
| 2 | 6pF | Capacitor_SMD:C_0603_1608Metric | C13, C14 |
| 2 | BSS138PS,115 | LCSC:SOT-363_L2.0-W1.3-P0.65-LS2.1-BR | Q2, Q5 |
| 2 | SK6812SIDE-A-RVS | LCSC:LED-SMD_4P-L4.0-W1.6-L | LED1, LED2 |
| 2 | TBD | Resistor_SMD:R_0603_1608Metric | R35, R36 |
| 1 | J2_FoldPads | ||
| 1 | 0.1uF 16V X7R | Capacitor_SMD:C_0603_1608Metric | C43 |
| 1 | 100R | Resistor_SMD:R_0603_1608Metric | R37 |
| 1 | 10nF | Capacitor_SMD:C_0603_1608Metric | C9 |
| 1 | 10uF | Capacitor_SMD:C_0805_2012Metric | C8 |
| 1 | 1k | Resistor_SMD:R_0603_1608Metric | R20 |
| 1 | 2.2uF 16V X7R | Capacitor_SMD:C_0805_2012Metric | C40 |
| 1 | 2450AT18A100E | Inductor_SMD:L_1206_3216Metric | AE2 |
| 1 | 33k | Resistor_SMD:R_0603_1608Metric | R25 |
| 1 | 360k | Resistor_SMD:R_0603_1608Metric | R40 |
| 1 | 4.7uF | Capacitor_SMD:C_1206_3216Metric | C42 |
| 1 | 4.7uF 16V X7R | Capacitor_SMD:C_1206_3216Metric | C44 |
| 1 | 500R | Resistor_SMD:R_0805_2012Metric | R2 |
| 1 | ADS1110 | Package_TO_SOT_SMD:SOT-23-6 | U4 |
| 1 | ATN_RFID | PCBAntenna:NFC_14MHz | AE1 |
| 1 | BAT | Foldable:LiPo_302025 | J3 |
| 1 | BAV70W | Package_TO_SOT_SMD:SOT-323_SC-70 | D6 |
| 1 | BOOT | LCSC:KEY-SMD_B3U-1000PM | SW1 |
| 1 | BQ24090DGQ | Package_SO:HVSSOP-10-1EP_3x3mm_P0.5mm_EP1.57x1.88mm_ThermalVias | U2 |
| 1 | CHG | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J2 |
| 1 | CHG | Diode_SMD:D_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D2 |
| 1 | CONMHF4-SMD-G-T | LCSC:IPEX-SMD_4P-L1.8-W1.7-LS2.0-1 | CN2 |
| 1 | CS1 | TestPoint:TestPoint_Pad_D2.0mm | TP2 |
| 1 | CSO | TestPoint:TestPoint_Pad_D2.0mm | TP1 |
| 1 | Conn_01x08 | Connector_PinHeader_2.00mm:PinHeader_1x08_P2.00mm_Vertical | J1 |
| 1 | DIM | LCSC:SW-SMD_SSAL120100 | SW7 |
| 1 | DIM | Diode_SMD:D_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D1 |
| 1 | DWN | LCSC:KEY-SMD_B3U-1000PM | SW5 |
| 1 | DYWH-IRM-H238T/2T | LCSC:CRYSTAL-SMD_4P-L2.0-W1.6-BL-B | U5 |
| 1 | ESC | LCSC:KEY-SMD_B3U-1000PM | SW3 |
| 1 | ESP32-WROOM-32UE | Foldable:ESP32-WROOM-32UE | U1 |
| 1 | HC-1.2-4PWT | LCSC:CONN-SMD_4P-P1.20_HCTL_HC-1.2-4PWT | CN1 |
| 1 | IR-I | Diode_SMD:D_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D4 |
| 1 | IR-O | Diode_SMD:D_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D5 |
| 1 | POW | Diode_SMD:D_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D3 |
| 1 | POW | LCSC:SW-SMD_SSAL120100 | SW9 |
| 1 | RST | LCSC:KEY-SMD_B3U-1000PM | SW8 |
| 1 | SA_0x78 | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP2 |
| 1 | SA_0x7A | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP1 |
| 1 | SEL | LCSC:KEY-SMD_B3U-1000PM | SW2 |
| 1 | ST25R3916-AQWT | Foldable:VFQFPN-32_L5.0-W5.0-P0.50-TL-EP3.5_Foldable | U6 |
| 1 | TPS73633DBV | Package_TO_SOT_SMD:SOT-23-5 | U3 |
| 1 | TRG | LCSC:KEY-SMD_B3U-1000PM | SW6 |
| 1 | UP | LCSC:KEY-SMD_B3U-1000PM | SW4 |
| 1 | VGF39NCHXT-B504 | LCSC:RES-ADJ-SMD_3P-L3.8-W3.7_VGF39NCHXT | RV1 |
| 1 | XRCGB27M120F3M00R0 | LCSC:CRYSTAL-SMD_4P-L2.0-W1.6-BL-B | X1 |
The 136 most common of 138 parts.
Questions
How big is the Microcard PCB?
It measures 173.2 × 54 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Microcard use?
138 parts, built around the ESP32-WROOM-32UE-N4, BQ24090DGQR, DYWH-IRM-H238T/2T and ST25R3916-AQWT. 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 Microcard KiCad files?
From the Volkov997/pen-card repository on GitHub, at the commit this page was made from: the board is microcard/microcard.kicad_pcb and its schematic microcard/2_54Ghz.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Microcard design in my own project?
Its repository publishes it under the GPL-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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