Circuit Lake

Polysensor, Low Cost Water Impurities Tester

admin — Thu, 17 May 2012 22:46:04 +0000

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 [...]

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AvrX, Real Time Kernel for AVR Microcontroller

admin — Wed, 16 May 2012 00:32:18 +0000

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 [...]

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AVR Touchpad Handwriting Recognition

admin — Mon, 14 May 2012 00:59:59 +0000

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. [...]

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Adjustable 1.5 – 35 Volt DC Regulated Power Supply

admin — Sat, 12 May 2012 00:35:41 +0000

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 [...]

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Firmware USB for PIC16F628, 16FUSB

admin — Thu, 10 May 2012 22:21:46 +0000

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 [...]

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Arduino Based Infrared Thermometer MLX90614

admin — Wed, 09 May 2012 23:54:12 +0000

If you want to build a contactless temperature measurement and looking for an idea, then this project is for you. Martin Nawrath has built non-contact infrared thermometer using MLX90614 and Arduino. This device can be used to measure temperature with range from -70 to +380 degree Celsius. Just connect the four leads to your Arduino [...]

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Wireless Altoids Display

admin — Wed, 09 May 2012 01:12:06 +0000

The aim of this project is to build a wireless 2×16 character display that fit to Altoids tin. It can be used to display data which is sent from the PC using a terminal program such as the Arduino ‘Serial Monitor’. The project consists of two main parts, first, the ‘remote’ Altoids tin containing Arduino, LCD [...]