power failure monitoring unit using PIC16F690

[Kamwana]

To design a PIC microcontroller based system to monitor power failure.

this is by implementing a PIC microcontroller that monitors and detects presence of voltage and current from a power source.If there is loss of power,it should identify loss of power and duration of loss,and have facilities of reporting failures to a central control.

 

Any ideas on where i should start?

[AJISH ALFRED]

Hi Steven,

I suggest you to start with the circuit first. Use step down transformers and rectifiers to reduce the voltage from 0-220V to 0-5V level. Use a filter capacitor to avoid ripples. Yes the circuit is similar to a normal battery eliminator, I’ve tried the same and it did work.

You can read this voltage using the ADC of a microcontroller and compare with a threshold value to detect a power failure.

[Kamwana]

THANK YOU AJISH!!

 

i was wondering where to start from….i will go and look up the circuit of a normal battery eliminator.The programming part of it is now the part i know  thats gonna be hectic,coz it has to dend the results of  the microcontroller to a central location….thanks alot

 

[AJISH ALFRED]

You are welcome Steven. Start with the project quickly and feel free to post issues regarding it if you face any.

[Kamwana]

hello Ajish;

 

i used the following circuit that lowers 220v to 9v but the microcontroller only accepts a maximum of 5v.how can i be able to lower the voltage level to 5v so that i can feed it to tha analog input of the microcontroller.

wysiwyg_imageupload:11702:

[Author]

Posts