The project shows you how to build simple Aquarium Feeding Timer. Instead using microcontroller, it uses famous IC 555. It is very useful for Automatic aquarium feeding DIY-er who don’t know MCU programming. The circuit uses simple monostable 555 circuit. It control Load relay (return pump). The timing period can be adjusted by turning the potentiometer. Read more Aquarium Feeding Timer Using IC 555
This AVR-based embedded system of high-resolution ultrasonic radar will help the driver to avoid potential accidents by telling the driver the minimal distance of obstacles behind the car which may be neglected by drivers. The system uses TV On-screen character display (OSD) technology as main display and LED as secondary display. In the light-emitting bars display modes, this safety car system will display the distance of obstacles through 3×8-segment LED. The more bars are lightening, the closer obstacles are.
The AVR Ethernet I/O board with accompanying PC control software offers remote control of 4 relay activated devices and status monitoring of 4 opto-coupled inputs over the Internet. Remote control is accomplished using any web browser-abled computer, or by running the custom “Ethernet I/O Control Panel” Windows software on an Internet ready PC. Browser based access offers straight-forward control of the relays and status monitoring of the opto-coupled inputs.
The Battery sAVR is an intelligent battery capacity meter that will log the discharge of a single primary or secondary cell over a period of time. But it’s more than a dummy load and data logger, with Atmel ATtiny26 AVR microcontroller, the Battery sAVR can emulate 3 different types of loads in real-time – Constant Current, Constant Power, and Constant Resistance. The user can also define a cutoff voltage down to 0.8V.
This is a video based remote environmental monitoring system for use in critical areas. The system enables you to connect remotely to a web page and obtain video image of the environment, temperature, mains power failure state, monitor the voltage of the backup battery, and monitor door contact state.
The project convert a standard residential water meter as an inexpensive industrial flow meter. To accomplish it, you need to remove the register of standard meter and adding a PCB to the top with a hall effect sensor to pick up the rotation of the internal impeller which has an embedded magnet that normally drives the register. The system was equipped a microcontroller AVR ATtiny2313 to controls the LCD, keypad, valve function, water metering and input power check. Read more Automatic Water Valve-Meter
Many embedded microcomputer projects require one or more switches for the users to control some function. It is possible to replace mechanical switches with touch-switches, which have several advantages: reliability, contamination tolerance, quiet operation, and a space-age gee-whiz factor that may help sales in some markets. With the recent development of low cost integrated circuits for doing touch-switches, using them may actually lower costs.
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