To Build ripple voltage rectifier Voltage Regulator and Measure AC Voltage Using Arduino By himshekhar. AC voltage when measured using a micro controller is a pretty difficult task as the wave gets easily distorted due to numerous noise present in the environment.
Therefore for proper design of the hardware is very necessary. A voltage regulator is designed to automatically maintain a constant voltage level. A voltage regulator may be a simple “feed-forward” design or may include negative feedback control loops. A transformer is an electrical device that transfers energy between two or more circuits through electromagnetic induction. A varying current in the transformer’s primary winding creates a varying magnetic flux in the core and a varying magnetic field impinging on the secondary winding. The transformer is used for step down purpose because the arduino is capable of reading voltage in the range of 0-5V only. Further the output of the transformer is fed into a voltage divider circuit.
The values of resistances is chosen according to your specifications. A bridge rectifier provides full-wave rectification from a two-wire AC input. The output from the voltage is fed into the diode bridge rectifier IC which gives a rectified full wave which is fed in to the peak rectifier circuit. The output from the bridge rectifier contains a huge amount of ripple.
One way to reduce this ripple is to use a filtering capacitor. Consider the full wave rectifier again, but now add a capacitor in parallel with the load . Again the capacitor charges when the voltage across it is greater than the voltage stored. We use a single limiter whihc is the first one since the wave is rectified . The output of this has very few noise left and can be fed to Arduino. Hello, How can I do the maths for 120 VAC 60 Hz?