Adjustable Constant Current Source
Adjustable Constant Current Source
(OP)
Hi.
I'm designing and implementing a NiCAD battery charger for fun. So far, I have my LM317 outputting approximately 1.2 A in a constant current source configuration. My question is how do I modify it to be an adjustable constant current source (say through my microcontroller) so that once the batteries' voltage plateaus then I start trickle charging and not damage my batteries? Thanks.
I'm designing and implementing a NiCAD battery charger for fun. So far, I have my LM317 outputting approximately 1.2 A in a constant current source configuration. My question is how do I modify it to be an adjustable constant current source (say through my microcontroller) so that once the batteries' voltage plateaus then I start trickle charging and not damage my batteries? Thanks.





RE: Adjustable Constant Current Source
RE: Adjustable Constant Current Source
TTFN
RE: Adjustable Constant Current Source
RE: Adjustable Constant Current Source
TTFN
RE: Adjustable Constant Current Source
Use a circuit for voltage regulator (voltage set for trickle charging) with current limit (current limit set to desired charge current).
If you want a more sophisticated charging algorithm try to find special ICs, some containing even a microcontroller, designed for that purpose.
RE: Adjustable Constant Current Source
RE: Adjustable Constant Current Source
DC
Doug Calli
Callico Special Effects