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Return to BlogUltrasonic Scanner with Infrared Capability
Posted Feb 03, 2012 at 12:19 pm
Figure 1
The infrared and ultrasonic scanner is made to scan a 180 degree area that ranges from about 6 to 21 inches away with a colored LCD to display the information.
The project utilizes an ultrasonic sensor from Max Botix while the infrared sensor from Sharp. A standard hobby servo is being used by this short range device while the information from the sensors is displayed on an LCD screen. An overhead view of the scanning are is the information displayed with increments of distance from the sensors.
The Atmel ATmega32 microcontroller is the core of the project which controls the servo, gathers information from the sensors and places the information on the LCD screen. The flash in the microcontroller is 32K and around 13K of this is the software. The microcontroller is running at 3.3V since the LCD uses a maximum of 3.3V.
A Nokia cell phone knock-off is used as the LCD since they provide a carrier board header with 0.1” size to make the assembly really easy. The 3.3V supply runs the LED-based backlight that the carrier board boosts up. The LCD display is limited to 256 colors for easy interface.
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