Because of the very cheap ACS712 Current Sensor Board modules available all over the place, I really think that everybody heard about ACS712 sensor from Allegro MicroSystems. As I was asked if “Can be used as a current sensor module for our ESP8266 Projects without too much hustle?”, I ordered few of them and let’s explore
Autorange Analog frontend For a deeper Hardware description please take a look at the ESP8266 Analog Extension Board What we will need: ESP8266 nEXT EVO Board ESP8266 nEXT EVO – Analog Extension Board – AN1 For programming and uploading the driver and the software we will continue to use the LuaUploader as before. ADC Frontend description
This is just a very quick example on how to add a Voltage Divider to the ESP8266 Internal ADC input to increase the ADC input range.For more theory behind, please take a look at the previous related article: ESP8266 – Internal ADC Today project: Measure a voltage input range from 0-5V with the ESP8266 internal ADC
From today we will move on the Analog interface part of the nEXT EVO Board AN-1 and we will start talking about the Digital to Analog conversion, Analog Autoscaling input and Analog to Digital conversion . For the Digital to Analog conversion part the choosen one is the Microchip MCP4728 I2C DAC IC. The MCP4728 device is a
