PCB Universal E-paper Adapter AP / ESP32-C3

This is a WiFi RF-ID Reader Template based on ESP32-S2-mini module and RC522 is a 13.56MHz RFID module #smartHome #ESP32S2 #ESP32 #Thread #Zigbee #BMD340 #wifi #gateway #referenceDesign #project #template #hub

This is a WiFi RF-ID Reader Template based on ESP32-S2-mini module and RC522 is a 13.56MHz RFID module #smartHome #ESP32S2 #ESP32 #Thread #Zigbee #BMD340 #wifi #gateway #referenceDesign #project #template #hub

This is a WiFi RF-ID Reader Template based on ESP32-S2-mini module and RC522 is a 13.56MHz RFID module #smartHome #ESP32S2 #ESP32 #Thread #Zigbee #BMD340 #wifi #gateway #referenceDesign #project #template #hub

Welcome to your new project. Imagine what you can build here.

Welcome to your new project. Imagine what you can build here.

Welcome to your new project. Imagine what you can build here.

3.3V Li-ion MagTek Stripe Reader Interface with ATtiny85, AT24C256, and MCP1700 (Edge-mount Pads, 25x12.5 mm, GND Pour, ERC/DRC OK)

This project is an RF-ID lock circuit, complete with microcontroller (MCU). It features an RC522 RFID reader for identification, controlled by an STM32F103C8T6 MCU. The structure also includes an OLED display, lock circuit, and user interface switches. Designed to operate with a AAA battery power source. #MCU #referenceDesign #simple-embedded #stm #project #STM32 #lock #OLED #template #reference-design

This project is an RF-ID lock circuit, complete with microcontroller (MCU). It features an RC522 RFID reader for identification, controlled by an STM32F103C8T6 MCU. The structure also includes an OLED display, lock circuit, and user interface switches. Designed to operate with a AAA battery power source. #MCU #referenceDesign #simple-embedded #stm #project #STM32 #lock #OLED #template #reference-design

Datasheet-driven MFRC522 RFID reader PCB intended to replicate RC522 module behavior at 13.56 MHz with a 3.3 V nominal supply, 2.5 V to 3.3 V operating range, and RC522-style 8-pin host header compatibility. The MFRC522 datasheet is the authoritative source for pin usage, power rail relationships, oscillator requirements, reset/IRQ handling, and antenna interface topology. AVDD, DVDD, and TVDD must be tied to the same 3.3 V rail; PVDD must be equal to or lower than DVDD; unused MFIN must be tied to SVDD or PVSS; SVDD must be tied to a valid supply if not used independently. The design must use a 27.12 MHz crystal meeting CL 10 pF and ESR <= 100 ohms, local 100 nF decoupling on each MFRC522 supply grouping plus bulk capacitance, and an RF front-end based on the MFRC522 application diagram and reference reader matching/tuning network. PCB priorities are short crystal and RF connections, compact placement of decoupling capacitors at supply pins, solid ground reference, and protected antenna region with minimal digital routing through the RF area.

Tiny MSR Card Reader - Always-On Battery Low Power, Encrypted Storage + Encrypted SMS

USB‑C PD Pass‑Through SD Card Reader (Sink + Source, USB 3.x)

This project is an RFID lock circuit, complete with microcontroller (MCU). It features an RC522 RFID reader for identification, controlled by an STM32F103C8T6 MCU. The structure also includes an OLED display, lock circuit, and user interface switches. Designed to operate with a AAA battery power source. #MCU #referenceDesign #simpleEmbedded #stm #project #STM32 #lock #OLED #template #reference-design

This project is an RF-ID lock circuit, complete with microcontroller (MCU). It features an RC522 RFID reader for identification, controlled by an STM32F103C8T6 MCU. The structure also includes an OLED display, lock circuit, and user interface switches. Designed to operate with a AAA battery power source. #MCU #referenceDesign #simple-embedded #stm #project #STM32 #lock #OLED #template #reference-design