This is simple and inexpensive LCD oscilloscope for spectrum analyzer display. The project use PIC 16F876A as main processor. Although a small LCD screen is not as good as analog oscilloscope, a LCD oscilloscope may be very useful in field measurements, for battery operation or you need different measurement at the same time along with oscilloscope.
The 80dB scale of this LCD oscilloscope can be adjusted with the two trimmers providing the reference voltages to the A/D converter. The operation of the LCD oscilloscope is slightly different between the 80dB mode and the 40dB mode. In the 80dB mode, the trace is always visible and saturates on the bottom or top of screen. In the 40dB mode, the trace runs out of the screen and only the central part of the original 80dB scale is displayed. This project designed by Matjaz Vidmar.
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Source code, documentation and schematic
tags : LCD, Oscilloscope, Spectrum Analyzer, PIC, microcontroller, project src
PIC LCD Oscilloscope for Spectrum Analyzers
Visual Analyzer Oscilloscope
Oscilloscope is tools for electronic designer must have. Unfortunatelly, the price for this hardware is too expesive especially for stuedent. But you can try Visual Analyzer Oscilloscope created by Sillanum Software.
Visual Analyzer is a free software oscilloscope. They describe it as "A complete professional real time software that transforms your PC into a complete set of instruments. No new hardware is necessary (you can use the Sound Card of your PC)."
Read more and download it click here
Digital Oscilloscope, AT90S8535
We chose to construct a digital oscilloscope as our final project for this course. The skills involved in this project proved a natural extension of some of the topics we covered in class. We were able to learn more about the UART, AD sampling, memory indexing, keypad usage and many other topics we touched on earlier.
Our Oscilloscope samples signals on a range of 0-4 V and displays them through HyperTerminal using VT 100 codes. The user, through the keypad, can select time per division calibrations ranging from .1sec to 2ms. The waveform is displayed along the user defined grid and peak-to-peak voltage and average voltage are printed out.
Link: Digital Oscilloscope
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