I am making a battery charger for charging 2 NiMh cell(esch of 2500mah).
I used 16f876a and LM317.I am using pwm to switch on and off LM317.
I didnt use the pwm module inside pic.I implemented it in software beacause
i want to port the code in to a low cost pic which doesnt have pwm inside.
Now... I have some doubts..Since i used 2 cells,what voltage level i need
to set for LM317 output?
I set it as 9v.When Lm317 is turned on then 560ma current flows through 2 cells.
Can i accept this value?
Whats period i need to set?I set it as 4ms.Duty cyle time is varied according to
the charging current.With 4ms period LM317 becomes extremely hot.Can I avoid heating of the IC by adjusting the period?
Can I accept this 4ms period?
How to determine that battery is fully charged?
2cells.. means1.25x2=2.50v..I heard that fully charged 2cells maintain 3.96v across across it.Is that currect?
I am using buit in a2d to check the voltage.I heard about dv/dt checkig of battery..Whats meant by that?How check dv/dt?