Blog
Extreme Temperature Monitor
The durability of conductive touch screen traces is a key issue in the field of electronics, and the 85/85 HAST test is an accelerated reliability test method that exposes electronic components to conditions of 85°C (185°F) and 85% relative humidity. Silver migration is a primary concern with…
Extreme Temperature Monitor
Silver migration is a phenomenon where silver ions migrate between conductive paths, potentially causing electrical shorts in electronic devices. The main causes of silver migration include moisture, voltage, impurities, temperature, and physical stresses. To address silver migration, manufacturers…
Optical Bonding
Optical bonding is the process of adhering a protective layer, such as a touch screen, directly to an LCD display, to enhance the readability and durability of the screen, particularly in challenging environments like outdoors or in direct sunlight. Two primary technologies have emerged in the…
Outdoor Monitor
Optical bonding is a technology that reduces the number of reflective interfaces in touch screen displays, resulting in increased light transmission, enhanced brightness, improved sunlight readability, and consistent display color. Optical bonding can improve light transmission by up to 5%, which…
Outdoor Monitor
Anti-reflective coatings (AR) coatings are thin layers applied to a surface to reduce reflections and improve clarity, but they may not be the best choice for outdoor touch screen applications due to their susceptibility to wear and tear, sensitivity to fingerprints, chemical erosion from…
Outdoor Monitor
Anti-glare coatings are a solution for outdoor touch screen applications, but they present multiple challenges, especially in bright sunlight. They reduce screen brightness, result in a hazy appearance, compromise color accuracy, and can wear off unevenly. Alternatives to anti-glare coatings…
High Brightness Monitor
Outdoor electronic displays, such as billboards and information panels, face challenges due to the combined thermal load of the sun and the backlight. Infrared cut filters, which block or absorb the infrared radiation from the sun, reduce the total amount of heat that reaches the display, resulting…
IK10 Monitor
IK10 vandal proof monitors are a crucial component of public transport systems, providing a high level of durability, safety, and reliability. They are designed to minimize potential injuries and are resistant to tampering, ensuring the smooth running of operations. They also offer significant cost…
IK10 Monitor
The impact rating IK10 is the second highest rating for impact resistant monitors, and is important for manufacturers of electrical and electronic equipment, the industrial sector, the public sector, the transportation industry, and outdoor applications to ensure the durability of their equipment…
Embedded Software
In this blog, I would like to provide a small Qt Quick application (qml) as an example of a Modbus connection over TCP/IP.
In the Qt examples, I have only found QWidget examples for Modbus connections, and after recently creating a Qt Quick application for this, I would like to provide a slimmed-…
Embedded Software Raspberry Pi
This is a guide for configuring the Qt-Creator to use cross-compiled Qt libraries for the Raspberry Pi 4 and to create applications for the Raspberry.
Embedded Software Raspberry Pi
This is a guide for cross-compiling Qt 5.15.2 for Raspberry Pi 4 and installing it on the Compute Module 4.
It's an update to my blog post Qt on the Raspberry Pi 4, with the difference that this time I'm using Raspberry Pi OS Lite.
Embedded Software Raspberry Pi
This is a guide for installing Raspberry Pi OS Lite on the Compute Module 4. As a work computer, I use Ubuntu 20, installed in a virtual machine.
Embedded Software Raspberry Pi
Recently I had to develop an application (kiosk system) for/on a Raspberry Pi 4. The special thing about it was that 2 touch monitors were to be connected via HDMI, which had to be rotated 90 degrees to the right. So portrait formats, 2 monitors on top of each other.
Rotating the screen and…
Embedded Software Raspberry Pi
Due to the frequent writing or overwriting of data, the lifespan of an SD card is affected.
For example, it is recommended to write temporary data (e.g. sensor values for comparative calculations) to a RAM disk for applications that often contain temporary data (e.g. sensor values for comparative…
Embedded Software
If you have created a Qt application - or any other application - for the Raspberry Pi 4, you often want the application to be called immediately after restarting the Raspberry after the application has been completed.
This is often attempted with start scripts that can be entered in various places…
Embedded Software
The task was to write a Qt Quick application (GUI) to upload new firmware to a touch controller.
The upload software was provided by the manufacturer in a .exe application that loads a .bin file onto the touch controller.
I wanted to use the Qt classes "QProcess", which can be used to call and…
Embedded Software
The goal was to write a Qt application for the Raspberry Pi 4 that can be used to switch between different WLAN access points and store the associated credentials.
I used a raspbian-buster-lite image and a Qt installation as described in Qt on the Raspberry Pi 4 as a starting point.
In addition, I…
Embedded Software Raspberry Pi
You can also use the USB-C interface of the Raspberry Pi 4, which is normally used for power supply, as a normal USB interface.
In this case, however, the Raspberry should supply power via the GPIO pins.
HMI
According to Wikipedia, haptic technology (force feedback) is a force feedback. A feedback from Kraft to the user used in computer input devices. Smartphone users certainly know what is meant when the user receives various information through vibrations and acoustic signals. For example, slight…