Automatic Charger Circuit for 12V 10A Battery

[zouzanda]

Homework Statement

i need to build a circuit which can charge a 12V 10 A battery to reach a votltage A and then stops charging until it reaches a voltage B it will rechrge again . i want to do this using thyristor

Homework Equations

The Attempt at a Solution

i found a circuit for a 12 v 4A it will reach A but i donno how to control B

 

[dlgoff]

I can't view your attachment since it hasn't been approved yet but I think a voltage comparator should do the trick. Take a look at http://en.wikipedia.org/wiki/Comparator#Op-Amp_implementation_of_voltage_comparator".

Regards

 

[zouzanda]

no sir it won't work cz 1st i ne the two voltagers not to be A and -A i need them to be A and B second i need to do that using thyristor

 

[dlgoff]

With a voltage divider, you can get A and B to be any posivite value you want between the positive and negative terminals of your battery. Then use these values as inputs to a couple of op-amps used as comparators. You should then be able use the comparator outputs to find a way to switch your charger on/off while using thyristors.

 

[zouzanda]

well it is a good idea but i canot use op amps sorry for wasting ur time any other ideas . i just can use thyristor diodes and resistors