|
I am sorry for not being clear(er)
The current control is done indirectly by modifying the output voltage of one of the supplies. This is done by applying a voltage (12 -- -0.6V) to the pad of the removed calibration potentiometer.
It turns out I can simplify this all greatly by using the shunt on the pcb through an lm358 (differential input) all with the internal 10bit ADC's on an AVR. 10bit gives enough resolution for this application.
The voltage output 'DAC' can of course be a simple PWM->rc network. Very similar it turns out, to the circuits on the aforementioned german website.
Also note that I am currently using this as the charger, but with a pot in place of the DAC and a cycle analyst as my meter(s)
So on I code...
|