Categories
Archives
- October 2021
- September 2021
- April 2021
- February 2021
- December 2020
- October 2020
- September 2020
- July 2020
- June 2020
- May 2020
- April 2020
- March 2020
- July 2019
- May 2018
- November 2015
- July 2015
- June 2015
- April 2015
- March 2015
- August 2013
- December 2011
- December 2010
- September 2010
- July 2010
- March 2010
- February 2010
- December 2009
- January 2009
- August 2008
- March 2008
- February 2008
- January 2008
- December 2007
- November 2007
- October 2007
- September 2007
- August 2007
- July 2007
- June 2007
- May 2007
- April 2007
- March 2007
- February 2007
- January 2007
- December 2006
- November 2006
- October 2006
- September 2006
- August 2006
- July 2006
- June 2006
- May 2006
- April 2006
- March 2006
- February 2006
- January 2006
- December 2005
- November 2005
- October 2005
- September 2005
- August 2005
- July 2005
- June 2005
- May 2005
- July 1999
Links...
Other
Meta
Author Archives: Administrator
Printer from calculator, part 1
In a pile of e-waste I found a printing calculator, Citizen CX-123II. It is a regular calculator (with some wicky calculations), but with a printer- all output from the screen are hard-copied to paper roll. It can print only numbers … Continue reading
ARM:0018 STM32CubeMX hack – printer class device
This article is about printer class device for STM32F103 and STM32CubeMX. Somehow there is NO printer device class example in whole internet. There ar CDC or HID examples copied from same STM32CubeMX example with minimal explanation, few of mass storage … Continue reading
Cutting PCB panels for new universal STM board
I’ve noticed, that Chinese made “Blue Pill” PCB has fake chips. Some chips are with smaller ROM and RAM size, some chips behaves a bit strange. Also, several mine projects are getting bigger and bigger. Recently, I acquired several bigger … Continue reading
Crazy ’80s – computer design with style
When I hear somebody talking that Apple is the pioneer in the computer design, I always want to show photo of Atari XL series: These ones are not the all, they are only ones from my personal collection. Remember, it … Continue reading
Capacitive soil moisture sensor – designed by retarded
There is a cheap, made in China product called “capacitive soil moisture sensor”. Some black PCB with few components and no coating: There are lots of “duino” projects for this sensor. But there are lots of comments about this sensor … Continue reading
ARM:0017 – go to sleep clock
This is a “gamers” clock. It sits near the monitor and shows the real time and time computer is on. This is achieved using USB as power supply. Also, the same USB port is used to set the clock. Battery … Continue reading
ARM:0016 STM32CubeMX – problems with RTC
This is a very short message about proper initialization of RTC (real time clock). There is one trick designed in HAL and in several internet resources it is wrongly described. Proper RTC init: Find “MX_RTC_Init(void)“, scroll to “USER CODE BEGIN … Continue reading
ARM:0015 STM32CubeMX screen libraries, part 2
Continued from Part 1. There are lots of different LCD or OLED screens in the market. Typically, it is possible to define 3 types of screens according to interface type: I2C, SPI and parallel data bus. There are also analog … Continue reading
ARM:0014 STM32CubeMX libraries for sensors and screens
In fact, any new program written for MCU is only copy-paste from older projects. Not real copy paste, but using the same libraries and subroutines. For some upcoming bigger project, I decided to use STM32 microcontroller, this means, I need … Continue reading
ARM:0013 STM32CubeMX – USB HID keyboard
Now we will build a USB keyboard. This project is based on STM32CubeMX canned example, HID mouse (see previous article). But we will change mouse to keyboard. Both devices are from the same HID class. First we need to change … Continue reading