Hello E-Wizards
As ai mentioned in another post I am experimenting on a MPPT charge
controller circuit for my Solar Muscle Electric Race Trike...

I am using an Arduino Nano (328) MCU and a cheap XL6009 based DC-DC
boost converter. Soon when those ASC712 current sensor modules arrive
I will try to maximize the output current of the XL6009 module by
varying the adjustment of the feedback...

And exactly that is the issue! The feedback pin is based on a 1.25
Volt threshold reference, with extreme amplification so normally a
simple voltage divider from the output gets  to cause a 'stabilized'
voltage. Now I managed to create a filtered controllable DC via the
PWM function of the Nano, and via a resistor influence that divider on
feedback, but I can only influence so much (right now I can achieve
close to 3V output regulation, before the actual feedback function
becomes unstable and I get unwanted output swings...

So what I am looking for is some kind of linear potentiometer like
circuit I can control from my PWM filtered DC?

Any hints highly appreciated

Cheers

Tobias


--=20
Tobias Gogolin
Tel. D1 (49) 0151 5187 5210
Tel. D2 (49) 0152 0839 5060
skype: moontogo
--=20
http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.