Electronics Projects, LCD Oscilloscope and Spectrum Analyzer Project with dsPIC30F4011 article
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Circuit dspic30f4011 microcontroller with 128 x 64 graphic lcd ACD used the information in the MCP6S21 (Lumex LCM-S12864GSF) on the display. All project source code, schematics have also given the detail description..
Facing the demise of my Tektronix 2213 in an unfortunate shipping journey, I faced the decision of either purchasing an expensive CRT to get it running again, or spending my nights surfing ebay for another scope.
The oscilloscope consists of an input stage consisting of a resistive attenuator with 1Mohm impedance, a switch to remove or insert a capacitor for AC or DC coupling, followed by several amplifiers. The first amplifier is a unity gain inverting buffer, followed by a level shifting circuit to center the signal around .5Vcc (2.5V) for the PGA and ADC. The stage immediately preceding the ADC pin on the dsPIC is a Microchip MCP6S21 PGA
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