1420MHz PCB Yagi Antenna

Introduction: After actual testing, I found that the S parameter was not very good and failed. I have made a new one. The project link is in the article. The board material is RF4, the interface is SMA, the gain is 8.85dBi, and it is a 4-unit PCB Yagi antenna resonating at 1420MHz.

Schematic PCB

Si24R2(E)2.4G Wireless

Introduction: 2.4GHZ wireless radio frequency communication can be used on student time cards and parking management system pdf document si24r2e.pdf

5.8G dual twin rhombus antennas

Introduction: 5.8G dual twin rhombus antennas. Sourced from public information on the Internet. The actual measured effect is close to that of a 14db flat panel. Looking forward to your draw distance test

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Mijia 433 gateway

Introduction: Use the cheap 433 device with long transmission distance to trigger the smart linkage of Mijia APP

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Cube-016_Fancy ESP32S2 development board

Introduction: The fancy ESP32S2 development board Cube series 016 project (deprecated standard)

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1420Mhz ANT

Introduction: The initial version of the 1420Mhz PCB Yagi antenna has been sampled and tested. For subsequent versions, you can refer to another expert’s https://oshwhub.com/bi6mht/1420MHzde-PCBba-mu-tian-xian

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RTplay1.35 XL2380_DevKit

Introduction: XL2380 module development board, with supporting routines and blog posts.

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NFC business card

Introduction: I tried the open source project successfully and made certain optimizations. You can visit my personal webpage to view details: http://cyberbrain.top/posts/d7c458d6/ (It is hung on github, if you cannot open it, please go online scientifically)

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2.4G Yagi Antenna

Introduction: Improved based on the existing antenna on the forum, the original antenna is connected to https://oshwhub.com/kxxxxc/yagi_ant

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K - ON! NFC card

Introduction: Introduction: 4-in-1 NFC business card, low cost, high practicality, ultra-thin size less than 1.6mm. Use the COB encapsulated NFC chip, use the toggle switch to select the card, and you can freely program access control cards, mobile business cards, WIFI network distribution, web links and other functions. The most important thing is that it has Daiwei on it! !

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Dormitory access control-RC522

Introduction: Using stm32 master control, adding a low-power Bluetooth module and a fingerprint sensor, you can use a card, fingerprint or wireless to open the dormitory door

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PN532

Introduction: PN532 IC card reader with serial port

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minipcie to pcie

Introduction: minipcie to pcie adapter board

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remote control car

Introduction: A simple remote control car that uses Hummingbird Wireless Ling-T3A as the transmitter module and Ling-R1 as the receiver.

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nfc health code button

Introduction: The NFC shortcut button can be attached to the back of the mobile phone and used with the mobile app to realize one-click direct access to the health code, payment code and other functions. This project uses Jialichuang EDA and is released at Lichuang Kaiyuan Plaza.

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pmod-gnss：GNSS PMOD、GPS + Glonass

This design is a PMOD with the ublox NEO GNSS receiver footprint. Able to receive GPS and GLONASS simultaneously.

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High power ZVS boost circuit

Introduction: ZVS is the so-called zero-voltage switching (ZVS)/zero-current switching (ZCS) technology, or soft switching technology. The efficiency of switching power supply can reach 75%~85%.

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Small ESP8266 development board

Introduction: Smaller ESP8266 development board, verified

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ESP8266/RFID badge

Introduction: Inspired by https://oshwhub.com/Giftina/ESP8266_CARD, rewiring, optimizing many circuit designs, adding RFID function, which can replace Nodemcu.

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Alan Walker/Ukiyoe style RFID card

Introduction: You can add NFC COB module or UID/CUID and other COB modules to implement smart card applications. Please add the font in the attachment, otherwise the logo may not be displayed normally. The font editing software is also in the attachment.

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