Circuit Lake

This low-cost stripped down mobile payment system features Radio Frequency Identification (RFID) for identification, 4-digit security pin authentication and Ethernet Data Transfer. The ATmega32-based project prototype is intended for a low-cost secure payment system that has the potential to change lives in rural areas of developing countries.The project is implementation of complete mobile-payment ecosystem comprised of RFID-enabled phones and text message (SMS) transactions to access a virtual account- a simple, fast and safe solution for financial transactions. Example application of the project is users would be able to pay for ...

This integrated voting system similar to audience poll system on TV game shows, Who Wants to Be a Millionaire. The keypads consist of an ATmega88 microcontroller and a MAX485/DS75176 RS-485 Transceiver. They are connected to a single RS-485 bus using daisy chain topology with CAT5 cables as connector. Keypad nodes are interfaced to the RS-485 bus using a RS-485 to TTL converter. Four push buttons are used to get the input from the audience members. To display the selected option, the keypads is equipped with LEDs.The RS-485 network is connected ...

The project goal is to built low cost TV Superimposers based on ATmega88 and ATmega48. The device allows you to display numerical data, such as temperature values, or characteristic data, such as short comments about the video feed along with real-time images from a camera. The project is composed of 2 PCB boards, VSP main board and Communication board.VSP main board NMJ2207 extracts a composite sync signal from the entered video signal. It inputs this composite-signal to the INT0 interrupt port of ATmega88(20MHz). The INT0 interrupt handler of ATmega88 chooses a ...

The Station Master is a small key ring sized alarm that uses an accelerometer to track your movement. The device will gently vibrate and let you know when you've reached your stop and it’s time to disembark from the train. Using a simple one button interface the user can set an alarm for the right number of stops and then be reminded when its time to get off.Nick Lott, the project designer, uses MCU AVR ATtiny13 as main processor, An MMA7260 3-Axis Accelerometer to monitor the tilt and movement of ...