Search Results for "hz converter"
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Showing 2 open source projects for "hz converter"
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nano_voltmeter
Nano voltmeter based on the Arduino Nano
A very simple nanovoltmeter with picovolt resolution. The high resolution is possible by using a chopper, auto correlation, a modified delta-sigma analog to digital converter, a 16 bit PWM with passive five pole RC filter configured in a self nulling loop. All signal processing after the chopper is done in the AC domain with the circuit configured as a nulling amplifier. AC amplifier gain is 10,000,000 and the amplifier is fed into the Arduino ADC. This gives resolution of 100 pV per bit... -
2
ArdWeighno
Ultra simple way to connect a load cell to an Arduino.
A load cell bridge can be driven by two Arduino Nano outputs configured as an H bridge. An AC coupled op-amp amplifier is used to amplify the signal and synchronous detection used to measure the signal. Timer 2 is used to drive the bridge and timer 0 is used to trigger the analog to digital converter. The hardware consists of a Nano, a single general purpose op-amp, a feedback resistor, coupling capacitor, compensation capacitor and bypass capacitor. Measurement speed is 122 Hz with four...
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