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 Fluoride ion, Potassium ion, Ammonium ion, Urea, and Mercuric ion.The instrument uses two techniques, Conductometry and Potentiometry. The conductometric sensor detects changes in conductance between two electrodes according to the Ohms Law. A conducting polymer ...

AvrX is a Real Time Multitasking Kernel for AVR microcontrollers written in assembly. Total kernel size varies from ~500 to 700 words depending upon which version is being used. Since the kernel is provided as a library of routines, practical applications take up less space because not all functions are used. AvrX has 40 API in the following six categories: Tasking, Semaphores, Timer Management, Message Queues, Single Step Debugging support, and Byte FIFO support with synchronization.AvrX 2.6, the latest version, is built for the IAR Systems and GCC C compiler. ...

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.A stylus is used to draw the figure/character on the touchpad, and the result is shown on an LCD display. Pushbutton controls allow the user to format the text on the display.The program is fairly ...

This small power supply provides a regulated voltage, adjustable between 1.5V - 35V at 1 ampere. This circuit is built based on IC LM317. This circuit is ready to use, you just need to add a suitable transformer. This circuit is thermal overload protected because the current limiter and thermal overload protection are included in the IC.This power supply is good solution to power your projects and save money on batteries. You can also use it for control DC motors and low voltage light bulbs experiments. It has not to ...