Circuit Lake

Teachers Timer is ATtiny13-based innovative and discrete timing device for assisting teachers and lecturers. Using cell phone style vibrations and a simple one-button interface the user can be alerted to the passage of time without staring at the clock. For lectures and presentations the device can also include a laser pointer that will gently fade in and out to alert the user."The idea is simple: it vibrates in your hand and you click the button to “snooze” the alarm, moving on to the next subject. No looking. No thinking," Said ...

The goal of the project is to build automatic home blinds system. The controller will open the blinds at first light and close them at sunset. If the sunlight becomes too excessive the blinds will partially close to protect the furnishings in the home. If the heat becomes too great the blinds will partially close to help keep room temperatures within reason.The main component of the project is Atmel ATtiny45 AVR microcontroller, solar panel to convert energy from the sun to electrical power, NiCad cells as energy storage and stepper ...

The project has ability to measure temperature from up at 8 DS1820 digital temperature sensors all on the same one-wire bus and Log it to a PC using RS232. It can be used to measure temperature at range -55 to +125°C without calibration. This AVR AT90S2313-based project use only 3 wires for all the temperature sensors: GND, VCC and 1-wire data. All sensors will connect to the same cable. "With this unit the microcontroller will search the bus automatically for all present DS1820's and record thier serial numbers in memory. ...

The project goal is to build an electronic door lock based on Arduino and ID-20 RFID reader. This security system consists of 3 main parts, Arduino controller, RFID tags Reader and electric door lock. The RFID reader is located outside of the door and is separated from the controller on the inside so no one can not breaking the security by open the RFID reader and short circuit it. The project uses Arduino controller to receives serial data from the Reader and controls the RGB led and the Door lock."The ...