Nov 6, 2015

Multichannel 12-bit ADC with Bluetooth Link

This module read the voltage from 4 channels through gain adjustment trimmer potensiometer . Internally, ADC range is 0.0-3.3V, to make it possible to read 0.0-6.0V potentiometers are added. Then voltage input is filtered by 10nF capacitor and clamped by 3.3 V Zenner diode to protect the mcu from over voltage and reverse polarity voltage. Bluetooth module send the data serially to a remote PC (0-20m away) for data logging. Power supply module input can vary 12-24VDC and the output is stable 5.0 VDC. I need this module for monitoring a QCS (Quality Control System) sensor voltage stability. As it is scanning on paper web, I need wireless device to connect it to unmoving PC. You can use it for other purpose as well, data logging can be used for different voltage range or non-wireless communication.  Minor modification on hardware and software would fit your application.

Board











Schematic











Donate and get the code here.

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