The process: Using a potentiometer, a few resistors and capacitors, and an operational amplifier, a frequency oscillator generates a signal. That signal is sent to an Infrared Light Emitting Diode [IR LED] across the first breadboard. Then, a photo-detector receives a much smaller version of that signal, as some of it is lost in the air. The circuit then determines the chosen frequency through filters and amplifiers, and illuminates a designated LED. My role: Set up measurement devices, and record data using Microsoft Excel. Help with breadboard layout and testing with my lab partner. Take pictures. Draft and edit lab report. The skills: Manipulate signals through an understanding of general circuits, and breadboard layout. Interface with electrical measurement devices, and record data. Learn to troubleshoot and redesign project through trial and error. The environment: Work in teams of two, and use the equipment at lab desks such as: oscilloscope, power supply, digital multimeter, computer, testing leads, and various tools as needed. The reward:Our project had a green LED light up to 2kHz and a red LED light up to 10kHz.
Lab Report
Project Pictures
The slideshow below has views of the transmitter, the operable IR LED signal, and the receiver.