Refer to https://zhuanlan.zhihu.com/p/349824627 , buy from here
Rotate button by Arduino
Month: October 2023
MCP4725 I2C DAC Breakout board
Bought from here Testing maximum frequency, around 800us
GY-4725 board
Bought from here. This code test maximum frequency, around 1ms period is peak Documents
計準NPN了
Main point: calculate Ib, we can do it by Ib=Ic / Beta min OR Ib=(Vb – 0.7) / Rb
syscall.c for STM32 + XCubeAI
Redis uses its own protocol to communicate between redis-server and redis-client
I thought db client sending plain text command (in SQL) to server and server parse the command. But I found Redis and Mysql client communicate to server via a custom protocol, that prove the client parse the command, not the server socat -v tcp-listen:8001,reuseaddr,fork tcp:localhost:6379
FPGA Research
This is a synthesis of a simple verilog program in vivado
“大中華程序員”及”大香港程序員”之定義
“紅色程序員”又或者”大中華程序員”之定義: “大香港程序員”之定義
Funny Toy : Oscilloscope
I got this electronic toy from Taobao, i want to have more experience on soldering and putting different components on the PCB and making them work. After 3 hours in soldering and 1 hour in debugging, i finally make it works https://v.youku.com/v_show/id_XNjAyNDAwNDY2OA==.html?spm=a2hje.13141534.1_3.d_1&scm=20140719.manual.240103.video_XNjAyNDAwNDY2OA== All documents here
Nucleo-L476RG DAC
砌機 : FPGA
Lattice FPGA比STM32簡單, 我應該可以搞得掂 用户手册： https://github.com/wuxx/icesugar-nano/blob/main/README.mdwin7串口驱动： https://github.com/wuxx/icesugar-nano/blob/main/doc/usbser.inf原理图及源码： https://github.com/wuxx/icesugar-nano 主要component其實得兩個: FGPA同粒Flash
CIO現象之觀察
已經同大部份嘅公營機構做過生意, 公營機構嘅IT部技術同hands-on氣氛同以下元素嘅關係 同以下元素有關係, 我解釋唔到點解, 但觀察得之係有一定關係
同香港啲阿叔嘅交流指引
香港有好多阿叔，業界學界商界全部都係由阿叔為主，同佢地只要係有少少聯絡，你都要好小心，以下是指引 香港唔存在”前輩”呢一層，我唔係話香港無人夠資格稱做前輩，而係真正稱得上係前輩嘅人太少，唔足以叫做一代人。所以要摒棄幻想，唔好諗住搞到啲阿叔去指導你，唔點你都算係咁。香港啲中小學生同年青人未知呢個事實，所以寫呢篇文。