In order to build a test platform for Odrive, an AS5047 encoder was designed to adapt to various hole position installations.
After using several common magnetic encoders, AS5047/AS5048 is the most worry-free, with stable data and low delay. Because the assembly hole positions always change, we simply designed a U-shaped slot with variable hole positions. The encoder can be completely fixed by fixing three screws. It supports hole positions with a pitch of 16mm~25mm.
The connector has been changed to GH1.25, with a lock, so you don’t have to worry about not plugging it in properly. The interface still follows the old rules, all are drawn out. SPI, PWM, ABZ, UVW.
For the time being, I have only tested SPI, and even Odrive has no problem. Logically speaking, other interfaces should also have no problem. There is no reason why SPI can not work with other interfaces.
Once done, the pictures without watermarks are gone, which is really not promotion and traffic. .
With the Odrive dual-drive board designed by the contradictory boss, the appearance is increased by 100%!
NFC communication verification board based on MFRC522, SPI interface, fully compatible with Arduino's MFRC522 library.
Because my project requires a very small NFC antenna, 30*20mm. So we need to redraw a PCB NFC antenna. But I was worried about impedance matching and domestic chip compatibility issues, so I made a verification board first. By the way, learn how to tune the 13.56MHz antenna.
There are four areas on the board, namely
1. Matching circuit without rc522 chip, including filtering, matching, and NFC antenna.
2. Complete circuit with RC522, the default is SPI interface, which can be directly connected to Arduino, and the card can be swiped in 3 minutes.
3. A single NFC antenna is used to easily connect the equivalent L, R, C, etc. of the VNA test antenna.
4. The NFC antenna plus matching circuit is only half of the antenna to facilitate impedance debugging.
It has been sampled and verified and is available. But please note that I am not making boards at Jialichuang, and the impedance matching parameters may need to be adjusted. (It’s not a big problem if you don’t adjust it. At most, the sensing distance is slightly shorter.)
Test conditions: Arduino platform, Dupont line link module SPI interface, 13mm diameter NFC tag (high temperature resistant tag, actual effective diameter is estimated to be 10mm)
test results: The card reading is normal, and the effective reading distance is about 20mm (the antenna and tag are both very small, and the distance required by the project cannot be large).
In addition, Arduino's MFRC522 library also supports reading the tag content in turn when two NFC tags overlap. (I asked several people who sell nfc modules online and they all said no. This is the biggest reason for making this module).
The remaining items and pictures are to be added.
BOM download
PCB_PCB_MFRC522 card swiping circuit_2_2022-09-22.pdf
PCB_PCB_MFRC522 card swiping circuit_2_2022-09-22.json
Schematic_MFRC522_NFC card swiping circuit_learning board_2022-09-22.pdf
SCH_MFRC522_NFC card swiping circuit_learning board_2022-09-22.json
MFRC522_NFC card swiping circuit_learning board_2022-09-22.zip
PCB_MFRC522 card swiping circuit_2_2022-09-24.pcbdoc
Gerber_PCB_MFRC522 card swiping circuit_2.zip
61875
FOC driver for Infineon TC264 microcontroller
Introduction: The FOC driver made by participating in the smart car cycling group has been tested. Smart car owners who are interested in FOC are welcome to learn FOC control based on this version.
The FOC driver is based on the Infineon TC264 microcontroller. The pre-driver uses IR2184S. The MOS is packaged in SON5*6. Basically, any N-MOS that can be welded can be used normally. The downloader is compatible with Zhufei.
FOC demonstration video: Infineon microcontroller FOC driver performance display_bilibili_bilibili
AD source project can be downloaded directly in the attachment
TC264-FOCPRJ-V4.0.zip
BOM download
PCB_TC264-FOCPRJ-V4.0.PcbDoc_2022-09-22.pdf
PCB_TC264-FOCPRJ-V4.0.PcbDoc_2022-09-22.json
TC264-FOCPRJ-V4.0.PcbDoc_2022-09-22.pcbdoc
Gerber_TC264-FOCPRJ-V4.0.PcbDoc.zip
Schematic_FOC driver for Infineon TC264 microcontroller_2022-09-22.pdf
SCH_FOC driver for Infineon TC264 microcontroller_2022-09-22.json
FOC driver for Infineon TC264 microcontroller_2022-09-22.zip
61876
[Internet of Things] Hongmeng WIFI switch +772984A
Introduction: Through the WIFI created by the chip, the mobile phone can remotely control lights/relays.
Reference video: https://www.bilibili.com/video/BV1Bu411D7qN?spm_id_from=333.999.0.0
Lichuang EDA Hongmeng smart switch.
Chip: HiSilicon Hi 3861
Operating system: open harmony
Through the WIFI created by the chip, remote control of lights/appliances (relays) can be controlled through the mobile phone.
Front.jpg
reverse side.jpg
20220328_143740_8374.mp4
20220328_143757_7687.mp4
main.py
BOM download
PCB_PCB_[Internet of Things] Hongmeng WIFI switch +772984A_2022-09-22.pdf
PCB_PCB_[Internet of Things] Hongmeng WIFI switch +772984A_2022-09-22.json
PCB_[Internet of Things] Hongmeng WIFI switch +772984A_2022-09-22.pcbdoc
Gerber_PCB_[Internet of Things] Hongmeng WIFI switch +772984A.zip
Schematic_[Internet of Things] Hongmeng WIFI switch +772984A_2022-09-22.pdf
SCH_[Internet of Things] Hongmeng WIFI switch +772984A_2022-09-22.json
[Internet of Things] Hongmeng WIFI Switch_2022-09-22.schdoc
61877
Smart building fire protection system based on Huawei LiteOS
Introduction: This project is a smart building fire protection system based on Huawei LiteOS. The main technologies include sensors, LiteOS, NB-IoT, 2G, Huawei Cloud, etc. Developed based on the Bear School smart smoke sensor case.
File description:
Smoke.zip is the complete project code. (VScode is version 1.52.1, using IoT link plug-in, Bear Pie development board)
oc_smoke_template.c is the core code. (Contains the core tasks of the project, including data collection and display tasks. Data upload tasks, command issuance tasks, alarm tasks. And complete design logic)
Intelligent-Building-Fire-Protection-System.pdf is the project document.
Other documents are related hardware reference materials.
The design of each layer of the three-layer architecture of the Internet of Things is as follows:
Perception layer: mainly uses smoke sensors and flame sensors to sense the environment for data collection, and display it on the LCD display. STM32L431 controls the actuator (relay), communication module (NB-IoT module BC35-G, GSM module SIM800C), and alarm terminal (voice module JQ8900, LED) to perform corresponding functions.
Network layer: Mainly responsible for uploading smoke value and alarm status value data (BC35-G) and making calls (SIM800C).
Application layer: Huawei Cloud is responsible for analyzing platform data packets, displaying data in real time and pushing alarm information (SMS alarms and Huawei Cloud platform alarms).
My blog/code related to this project:
GitHub: https://github.com/hyydf/Intelligent-Building-Fire-Protection-System
The reference material
refers to the posts of Huawei liteOS open source community, community link: https://bbs .huaweicloud.com/forum/thread-66201-1-1.html
Obtain the complete set of information about the Little Bear Pi development board: https://bbs.huaweicloud.com/forum/thread-22109-1-1.html
Little Bear Pi IoT development board Collection of tutorial series: https://bbs.huaweicloud.com/forum/forum.php?mod=viewthread&tid=26415
Quectel_BC35-GBC28BC95-R2.0 Series_AT Command Manual_V1.1.pdf
JQ8900-16P voice module-data package.rar
Intelligent-Building-Fire-Protection-System.pdf
SIM800CMINI information v4.3.zip
oc_smoke_template.c
smoke.zip
BOM download
PCB_PCB_Complete Circuit_2_2022-09-22.pdf
PCB_PCB_Complete Circuit_2_2022-09-22.json
PCB_Complete Circuit_2_2022-09-22.pcbdoc
Gerber_PCB_Complete circuit_2.zip
Schematic_Smart building fire protection system based on Huawei LiteOS_2022-09-22.pdf
SCH_Smart building fire protection system based on Huawei LiteOS_2022-09-22.json
Sheet_1_2022-09-22.schdoc
61878
WHOOPICK light panel
Introduction: Using w2812b-2020 led and 1.25mm jst connector
Using w2812b-2020 led and 1.25mm jst connector
BOM download
PCB_PCB_whoopick light board_2022-09-22.pdf
PCB_PCB_whoopick light board_2022-09-22.json
PCB_whoopick light board_2022-09-22.pcbdoc
Gerber_PCB_whoopick light board_2022-09-22.zip
Schematic_WHOOPICK light board_2022-09-22.pdf
SCH_WHOOPICK light board_2022-09-22.json
Sheet_1_2022-09-22.schdoc
61879
GSY-PD
Introduction: Laser amplitude modulation drive current
Laser amplitude modulation drive current
BOM download
PCB_GSY-PD_20200304 copy_2022-09-22.pdf
PCB_GSY-PD_20200304 copy_2022-09-22.json
GSY-PD_20200304 copy_2022-09-22.pcbdoc
Gerber_GSY-PD_20200304 copy.zip
Schematic_GSY-PD_2022-09-22.pdf
SCH_GSY-PD_2022-09-22.json
GSY-PD copy_2022-09-22.schdoc
61880
electronic
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