Circuit Lake

This vehicle security system built using Atmel’s Atmega8 AVR microcontroller, Analog Device’s low cost acceleration sensor ADXL311JE and Dallas semiconductor’s DS1973 iButton. The circuit powered by small battery power supply which is integrated with the unit. The system works as follows, whenever Atmega8 detects the change in acceleration by continuously comparing the ADC count, it looks for DS1973 iButton with the identification number preprogrammed in MCU flash. If it detects the same then no alert will be generated else it activates the on-board siren to generate alert sound informing about the ...

The purpose of the project is to monitor the temperature of three compost heaps. It will send the data wirelessly to the receiver and process or display the result to PC. In the transmitter board, the project uses the TXM-433 as RF transmitter and MCU AVR AT90S4433 (you can replace it with AVR ATMEGA8) as main controller. While temperature is sensed using a 10K nominal thermistor. The uC normally is in an "idle" state. In "idle", the clock still operates but the rest of the uC is shut down. The ...

The CarbCounter+ is PIC32MX460F512L based Food Scale combined with a PDA. The device built to help people with Diabetes manage, log and calculate their Carbohydrate information. This allows for more accurate insulin dosages and control, thus reducing the possibility of complications later in life. CarbCounter allows parents of toddlers, school kids, people on the go or anyone who wants to easily and accurately calculate carb content of their food. Beside Type 1 & 2 diabetics people, this food scale also suit for people on special diets. Project features food scale with ...

This Radioisotope Analyzer project is built around PIC32MX360F512L. The device used for identifying and studying sources of ionizing radiation. This handheld laboratory instrument will processes the signal from a sensor called a "scintillation probe", analyzes and stores the data, and produces a graphical output known as an "energy spectrum". The location and amplitude of peaks within the spectrum gives an indication of which radioisotope is present. The sophisticated data-analysis tools featuring a back-propagation neural network for modeling unknown samples and comparing against previously measured samples. Pete, the designer, explain that the PIC32 ...

An electronic project design is a process to build electronics device with certain function using electronics component such as ICs, capacitors, resistors, cable and others. Sometimes build a electronics project is not only 'connecting' wire between electronics component but also involve chemical process, in this case PCB etching. PCB Etching is a process removing unwanted copper after applying your Schematic pattern to blank PCB with chemical liquid. For better results and faster is recommended you use hydrochloric acid and Hydrogen Peroxide formula with water + 7 units 4 units 2 units ...

This AVR ATmega8 based radar range finder project uses infrared light instead of ultrasonic. The project is built to detect sound absorbing materials like padded furniture which can not be detected by ultrasonic radar. Ultrasonic ranging systems require many milliseconds of acquisition time rendering them unusable for fast moving systems. The range finder described here can make a measurement in sub millisecond time frame. It can detect a white sheet of 8.5 by 11 white paper at a distance of a few feet. Not only does it provide a range reading ...

This is LED lamp project powered by solar. It will harvesting the Sun during the day and charging the battery. The project uses SEPIC converter that capable of boosting or dropping the input voltage. It allows the use of a battery with a voltage close to the LED conduction voltage. The project is built around ATTiny15L microcontroller. João Silva, the project designer, said that the software used was straight forward, start the high speed oscillator, start the PWM generator, read voltages, take decisions and increase/decrease PWM output. One note worth mentioning ...