Circuit Lake

This versatile data logger is built around the AVR Butterfly. It is a cost effective solution that monitors light, temperature, battery voltage and external sensors. The external sensors can be digital signals, analogue voltages or a frequency. There is provision for up to four external analogue sensors in addition to those shipped on the butterfly for temp, light and battery voltage. Although the digital sensor interface is currently designed to use Phillips I2C it could easily be expanded to include a Dallas 1-wire bus as well. Simple wake-up circuitry was ...

The ATmege16-based Airplane Servo Controller helps model aircraft hobbyist to set up control surface throws on a model aircraft easily. The system directly drives the control signals of the aircraft servos while leaving plenty of I/O for reading push buttons and interfacing with an LCD.The project has six push buttons for user interface. It has functions to switch incrementally from channel to channel, move current channel to full counter-clockwise position, move current channel 4% more counter-clockwise, move current channel to middle position, move current channel 4% more clockwise, and move ...

The AVR-based GPS navigator named as Butterfly GPS, allow you to find your fixed position of Latitude and Longitude along with date and time in UTC. This simple GPS receiver device uses ATMEGA169 Butteryfly kit as main controller and GPS receiver engine based on SiRF chipset.The device is simple to operate and needs no special care except that you need to find a reasonably clear spot looking towards the sky to get a good fix. Once you have the Lat/Lon fix, use a map with grid locators to find ...

This PIC16F84A-based gas detector project has capability to sense many different types of gases like smoke, liquefied gas, butane and propane, Methane, alcohol, hydrogen, etc. This simple gas leak monitoring project only need few component and easy to build. It uses Smoke Sensor Module GH-312 to detect gas or smoke. For warning sign, the project is equipped with LED, LCD and Piezoelectric.Rui Cabral, project designer explains that during testing progress, the sensor is able to detect the gas from soldering iron. The system will trigger a flashing led warning, sound ...