Luca made an Amp-meter using the ACS712 current sensor, and the Arduino.
The ACS712 is a fully integrated, hall effect based, linear current sensor. It converts the current that passes through its input pins to a proportional voltage on an output pin. He connected the output pin to an analog pin of his Arduino, and made a simple logging software that reads 1000 samples.
sir can i have the formula to get the current(ampere) of a given adc value?
please send it to my email add
tnx :)
The article that is linked to in the post have both the formula and Arduino code for converting the adc readings to amperes.
http://www.lucadentella.it/en/2011/11/29/sensore-di-corrente-con-arduino
the lucandella website is now dead…