Circuit Lake

Sing-along is a musical tone memory game for 1 to 3 players. The game plays a random sequence of notes, then it listens for the player(s) to sing or hum the notes back to it. The sequence keeps getting longer each time the player sings it correctly. If a player does not sing a note within the allotted time, or sings an incorrect note, then a “lose” sound will play. If a player correctly sings the entire 16-note sequence, then a “win” tune will automatically play. In addition, the game has several LEDs to indicate which player’s turn is in progress, and to follow the notes as they are played or sung.

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The is a simple and less expensive amateur long-period seismometers by using PIC microcontroller and other new chips, such as switched capacitor filters. Long-period seismometers are useful for detecting and analyzing distant teleseismic activity (worldwide). Main part of the project is PIC 14000, MAX7401, and AD8628. The PIC controls A to D, time integration, etc. MAX7401CPA works as filter chip (8th order, low pass, Bessel, switched capacitor filter). As amplifier, it uses AD8628 auto-zero low noise, precision, rail-to-rail output, op amp. Read more Long-Period Seismometer

If you need tools to log and analyze your USB project then Virtual USB Analyzer might help you. It is a free and open source tool for visualizing logs of USB packets, from hardware or software USB sniffer tools. The tool provide a graphical visualization along with raw hex dumps and high-level protocol analysis.

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The project was designed for a calorimeter which will control the temperature of an outer metal box surrounding an inner calorimeter base plate. This will isolate the inner base plate from external temperature variations. The design will use a semiconductor temperature sensor to measure the temperature of the metal box, and will use a Proportional/Integral (PI) control algorithm to power a heater and drive the box temperature to the desired temperature. Read more Precision Temperature Controller

This project shows you how to build thermometer with multiple sensor. The project use AVR ATMega168 as main processor and DS18×20 1-Wire® Thermometers as temperature sensor. It can monitor up to 16 DS18×20 thermometers, with a variable logging rate of 5 to 9999 seconds. The data is displayed on a multi-page LCD display and send to PC via RS232 at 19200 baud rate for recording. Read more Multi Sensor Thermometer

There are some ways to measure humidity in soils, which are different and more difficult than measuring relative humidity or humidity in air. One example is to take the sample, warm it up and measure the time it takes to loss humidity and the weight of the soil before and after the process.

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If you want to build Light dimmer that can be controlled from many ways then check out this Network Light Dimmer. This AVR AtMega8-based light dimmer project has multiple control interfaces such an RS485 network, an infrared remote control, a proximity touch slider or touch sensor (Qprox QT401/QT110). Other features including Opto isolated and handle power up to 500watts. The device is powered from the RS485 network connection which has +12, data+, data- and GND. Read more Multi Controller Light Dimmer