September 8, 2015 in Hardware, News, Raspberry PI by admin
Although it’s pretty easy to hook up a Raspberry Pi to a screen using its HDMI port, it’s not exactly the most portable of solutions (especially if there isn’t a TV or monitor around). The Raspberry Pi Foundation recognized this, so it set about finding a “simple, embeddable display” capable of giving Pi owners a screen from which to work from, but that also embodies the DIY spirit of the board that it connects to. It’s taken almost a year, but the official Raspberry Pi touch display has gone on sale today, offering tinkerers a 7-inch capacitive 800 x 480 touchscreen display that supports 10-finger touch.
As you’d expect, connecting the display to the Pi requires a steady hand and a little patience — it’s not as easy as plugging in two ends of an HDMI cable (but that’s all part of the charm, right?). You can choose to power it via the Pi’s GPIO port or by plugging a microUSB power supply into the display board, while a ribbon cable connects to the Pi’s DSI port. The Raspberry Pi Foundation has ensured that both the display board and the Pi itself can be mounted on the back of the display (as shown in the image above), making it a lot easier to connect the various cables and also to store.
For the full article, follow this link.
October 29, 2013 in Hardware, Microcontroller, STM32, Tips & Tricks, Tutorial by admin
There are a lot of sellers on ebay selling cheaply 320×240 LCDs with touch screen together with a microcontroller board. Usually the development board contains a STM32F103 microcontroller (sometimes different) with or without some additional hardware. As an exemplification one of such sold configuration is:
- 3.2″ TFT LCD Module, 320 * 240 pixels resolution, 26m colors.
- Resistive touch screen, with XPT2046 Controller.
- 4-6 leds
- Twobuttons connected to GPIO lines
- Serial communication interface
- 2 mini-type USB socket, USB to RS232 and USB Device
- 1 Micro SD card connector
- A JTAG / SWD debug interface (20pin)
- RTC battery
- USB Power Supply
This web page not only has some information about how these boards could be used, but also provide some sample code using the LCD and a downloadable virtual image, containing:
- Ubuntu desktop
- ARM toolchain (gcc + newlib)
- Eclipse C++ IDE
- stm32loader.py – for loading code into the board
- openocd – for loading code and debugging
- Example FreeRTOS project with all source code, include LCD+touch drivers and a simple menuing system to get you started quickly
Isn’t that awesome?
For the original article and the link for downloading the virtual image, follow this link.
October 28, 2013 in AVR, DIY, Hardware, Microcontroller by admin
What do you need for a nice DIY wrist watch? Apparently a small microcontroller, an RTC chip, OLED screen.
This awesome DIY wrist watch based on Atmel ATmega328P microcontroller and DS3231M RTC and 1.3″ 128×64 monochrome OLED screen. For more information on this awesome project, follow this link.