Electronics > Beginners
Beefing up a Won-Hung-Lo Boost Converter
dmwahl:
Here's a schematic of the circuit for reference:
http://cr4.globalspec.com/comment/1018737/Re-Power-Supply-DC-DC-Step-Up-Converter-Problem
dmwahl:
Thanks for the reply, seems obvious now that I know my mistake. I realize it's only limiting input current, which is fine for me. My goal is to turn it into a cheap mppt boost controller to charge my lawnmower with. I'm going to use a digital pot to control the op-amp gain, and monitor input current and voltage to find mppt point.
Seekonk:
I'm going to be doing this to charge my vintage boat at low speed which had a 6V generator. I inly need 3-5A.
dmwahl:
I'll post my results here, I made a quick PCB to hold the digital pot, current sensor, and an arduino pro mini to do the math. I'm planning on using a 30W solar panel intended for 12V batteries. Peak current is only around 2A. If it works well I'll post the PCB files somewhere so anyone else can use them.
metallicus69:
"Any ideas why replacing the LM358 with a TL072 would prevent the board from working properly?" I think itÅ› because LM358 is Rail to Rail and TL072 is not.
Has anyone succeeded in beefing up this circuit?
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