Is it possible to modify a power wheelchair charger as voltage adjustable?

Alec_t

Joined Sep 17, 2013
12,163
Not sure what you're asking. A smart charger will adjust voltage and current to give a correct charging profile for a particular battery chemistry.
 

Thread Starter

LAOADAM

Joined Nov 21, 2018
628
Not sure what you're asking. A smart charger will adjust voltage and current to give a correct charging profile for a particular battery chemistry.
Thanks.
I may shouldn't use the word 'smart', it is a charger, my question is if it is to modify it's voltage variable which is fixed now.
 

Dodgydave

Joined Jun 22, 2012
10,042
Are you wanting to use it as a separate PSU for something else , ?

The usual way to alter the voltage is to change the feedback resistance to the optocoupler, but as yours is controlled by a Pic, it might be difficult.
 

Thread Starter

LAOADAM

Joined Nov 21, 2018
628
Are you wanting to use it as a separate PSU for something else , ?

The usual way to alter the voltage is to change the feedback resistance to the optocoupler, but as yours is controlled by a Pic, it might be difficult.
Thanks.
You are right, I saw some one convert a laptop power supply into a variable voltage source, I think the Pic may take a feedback from the battery be charged, but there are only two wires.
 
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