NeuroBytes are stamp-sized electronic neuron models that can be freely connected to form complex and biologically representative neural circuits. The NeuroBytes platform is currently in its fourth prototype generation with approximately 100 individual elements built to date, along with numerous accessories that help constructed networks interface with the real world.
This can be used as a stamp sized VGA and keyboard interface module in an embedded design. It can be connected to a VGA monitor, PS/2 keyboard and act as a terminal via TTL serial port.
While there are a lot of ARM based VGA projects out there, this is an exercise to see what can be done with the low end STM32F030F4 that has only 4K of RAM and 16K of FLASH. It boots up instantaneously so it doesn’t miss critical boot up messages from the host.
I named it Chibi Term. (Chibi = Small in Japanese)
LiFePO4 is a battery technology that finds wide application in power tools and electric vehicles. It is an inherently stable chemistry (which makes it safe), is environmentally friendly (no heavy metals), has very high power density and many more recharge cycles than other Lithiums.
Easy to use module to get started with LiFePO4 in your own designs. It’s basically a battery with an integrated USB charger. All connections are on a 0.1″ grid for easy integration. Take power straight off the battery holder terminals, or if that doesn’t fit in your design, cut off the battery terminals and connect to the 0.1″ header footprint.
The EAGLE design files are available in this GitHub repo:
The project is built on top of a LiFePO4wered/USB module. A small board is added with an MSP430G2131 microcontroller that takes care of monitoring input and output voltage, monitoring a PCB touch button, driving a power indicator LED and switching the load (the Raspberry Pi power). The microcontroller is also connected to the Pi’s I2C bus and monitors the Pi’s running state. The small board connects to 8 of the Pi’s GPIO pins but leaves the rest free to allow prototyping using fly leads.
Professional quality audio breakout board, mainly targeted towards Teensy 3.x and Raspberry Pi 2, but also should be compatible with any boards having an I2S and I2C interface broken out (FPGA boards with enough GPIO included).
I mentioned a while back in the Audio Library thread that I was interested in putting together a high quality (24 bit) audio board. I finally got to a point in my projects where a higher quality audio codec board would be helpful, so I dove in and put together 2 designs. One design uses a slightly better performance codec (a Cirrus Logic CS4270) than the SGTL5000, and the second uses the highest quality codec I could find that is easily hand solderable (the CS4272).
The KiCAD board project including libraries are on GitHub:
Joe writes: “The design features an Arduino Mini Pro 328, 2.2-inch TFT liquid crystal display (LCD), DRA818U voice transceiver module, electret condenser microphone, speaker, and buttons for channel/ frequency selection and push-to-talk capability. Bitmap images are stored on a microSD card and displayed on the LCD to indicate the currently selected channel. A 2000mAh Lithium-Polymer battery provides more than 20 hours of playtime before recharging is necessary.”