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.

Water Level Sensor of Washing Machine (STM32F103C8T6)

Washing Machine Typical work principle of water level sensor of a washing machine shown on the picture. Sensor is located above the wa...