Circuit Lake

Polysensor is built to provide a low-cost and easy method for testing impurities in water, with low-cost, rugged and tropicalized sensors. Currently, the instrument can be used to measure pH, Electrical conductance (EC), Total Dissolved Solids (TDS), Nitrate ion, Chloride ion, Salinity. The project is being developed with more parameters to be added such as [...]

This ATmega644-based project implements a touchpad input system which takes user handwriting input and converts it to a printed character. Currently, the device only recognizes the 26 letters of the alphabet, but it could be easily generalized to include any figure of completely arbitrary shape, including alphanumeric, punctuation, and other symbols using available training system. [...]

The 16FUSB is a software implementation of the USB low-speed for PIC16F628/628A microcontroller. All communication stuff is done by the firmware written in ASM, completely discarding the need to use an additional chip.
From the 16FUSB core is possible to add implementations of other protocols such as, for example, I2C, SPI or simple write data from [...]

AvrPhone is ATmega128A-based simple mobile phone with touch screen and SIM100S GSM module. The display uses 2,4″ LCD with a resistive touch screen and ILI9325B driver (16 bit parallel bus).
The LCD breakout board contains SD card slot and XPT2046 touchscreen controller. They both are connected to AVR’s SPI bus. The project is powered by [...]