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Minimum Mass Waveform Capture and Display using AT90S2313 microcontroller

A 128 x 64 graphic LCD is in the clear plastic box at the top. It is connected to the waveform capture and control unit in the green pencil box below the display.   Downloads AVR Studio 3.5  ASSEMBLY SOURCE for the waveform capture controller. AVR Studio 3.5  ASSEMBLY SOURCE for the control panel and LED Display controller. Also needed: Circuit and Firmware to support and interface the Seiko-Epson G116 ...

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A Field Strength Meter Using A Biased Schottky Detector using microcontroller

Downloads Download the Download FreePC files in and the detector board layout png file in zipped forma: schottkydedtector080309 Find updates at www.projects.cappels.org Starting to do a little work at 330 MHz, I decided that my existing field strength meters were not adequate for for my needs. The 330 MHz project came to a stop, and I set out to put together a field strength meter with a moving needle indic ...

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Precision Audio Frequency Peak Detecting Probe using microcontroller

This is a handy companion for a digital voltmeter. Its allowed me to do a lot of things I used to use my oscilloscope for, and in addition it measures voltages to much greater precision.Using an LM324 quad op amp, this peak detector provides 2% measurement accuracy on square waves from 5 Hz to 20 kHz. Circuit description: Taking the circuit from left-to-right, the first op amp (lower-left corner, inputs pin ...

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HF AC Millivoltmeter Adapter using microcontroller

Encased in a pencil box to keep the point-to-point wiring on the back of the board from shorting to wires and things on the workbench, the plastic case also holds the offset and gain post as well as the input connector and the switches that switch on the near-zero and near-full scale references. I wanted a way to measure the current in some HF power circuits and thought it would be a 5 minute task to throw ...

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PHduino pH Meter Using Arduino

About This project describes an open software open hardware pH meter using an Arduino/Freeduino board. In other words, this is an electronic circuit to be connected with a glass electrode pH sensor. It was possible by the idea from my friend Mr. Denis Vidal, the space that my supervisor gave me, prof. Dr. Emanuel Carrilho, BioMicS Group, Instituto de Química de São Carlos, Universidade de São Paulo, Brazil, ...

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A Microcontroller Based Digital Lock-In Milliohmmeter using ATtiny2313 microcontroller

Download: assembler source mhm031002A.asm A milliohmmeter is just the tool for checking trace resistance on a printed circuit board, tracking down shorted traces, and measuring the contact resistance of a switch or connector. Its the kind of tool that would come in real handy occasionally, but not often enough to justify shelling out hundreds of dollars. Wanting one anyway, I set out to make my own. It turn ...

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TRUE RMS-TO-DC Adapter For DVM using microcontroller

Specifications Input: AC, DC or AC+ DC to > 10 KHz Ranges: 200 mv, 2V, 20V, 200V, 600V full scale Accuracy: ±1%, depending on divider resistor selection Crest Factor: 1 to 3, up to 5 with degraded accuracy Input impedance: 1 Megohm shunted by 20 pf Battery drain < 300 uA Introduction The DVMs in the photo above measures AC voltage by detecting the peak AC voltage on the 200 VAC or 500 VAC scale, then ...

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