Everyone has been in a situation, while prototyping your project you are in a need of more power and easy to configure peripherals. The requirement might not be easily met by an 8-bit Arduino which currently seems to be the best way to prototype your project faster. There are situations, where you need a microcontroller with fairly large number of pins, but most of them are available in SMD package which are so hard to solder. So Gaurav has come up with a breakout-board for his own, which is based on PIC32 based controller few necessary peripherals like bunch of LED ,few switches , USB , EEPROM , V-Reference for ADC ,Oscillator and Voltage regulators too.
The cost of the board has been tried to keep as low as possible and the most important thing, the board is bread-board compatible. The board boast off two on-board oscillator, an altimeter and temperature sensor along with a digital compass. It has also has a combination of different types of LED’s and few user switches. The board seems to be a good choice for robotics project.
DRUM-MACHINE is a device which is modelled on classic machines like the ROLAND TR808. However, this version is digital and not analogue in nature and only require a single microcontroller which is PIC24 in this case to work. The PIC has 128kb of memory which is enough to store audio samples. Another advantage of PIC24 is it is capable of running at 40MHZ of frequency which is quite fast. However the author switched to PIC32 in the later stages as he couldn’t get the prototype working.
The advantage of PIC32 was that the user has full-access to flash memory s so it made the code part easier. Talking about the DRUM, the drum features 16 different instrument which are stored in flash memory along with 16 step patters with 16 pattern per song. It also has 8 sample polyphony, which are sample from classic drum machines. Another advantage is it can drive audio headphones directly or a speaker via a TPA301 IC. The data is displayed using a Nokia 5110 LCD and there are also a combination of 20 LED’s which are driven by a driver from MAXIM.
QR code is capable to carry decent amount of information so it is suitable for encoding things like time. When you look at video it seems that it is some sort of alien clock ticking (the one you saw in “Predator” movie). All you can distinct here is a tick every second. If you need to tell a time you need to take a picture and decode QR message.
Clock was build by Markus with original idea taken from LED matrix based QR clock. Clock runs on PIC32 microcontroller which decodes time signal from DCF77 receiver, then calculates QR code and displays on ST7735R graphical LCD at 30FPS. It has a nice feature programmed in. When clock is unable to read radio signal it displays time in greyscale and it gets colorful with plasma effect once it locks to DCF77 signal. I would probably add a digital time as well to the screen since QR clock is quite useless unless you are really well trained to read them on the fly
Some images are portrait and other are landscape. When taking photos you probably were trying to get best picture out of it and rotated camera as you found it necessary. Well then after in order to view pictures correctly you need to rotate them. Markus found another great solution. Instead of editing pictures he left rotation job for his frame.
He made a platform with 320×240 graphical LCD attached using servo motor. Images from SD card are uploaded to screen with help of PIC32 microcontroller. Electronics is mounted on prototype board using through hole elements only. Sadly the frame doesn’t support jpeg images only raw. So they must run through python script for conversions. But this process is fast and works automatically. Finally raw image data is taken from SD card analyzed by microcontroller and depending on image scale it is rotated for best view.