Hi Guys,
I'm new to this forum but it has already been a great help!
My name is Lee and I'm doing an MSC project in MPPT technologies. I'm looking for some help with the design..
Apologies if this material has been covered before!
I have coded what I believe to be a Perturb and Observe algorithm in C, to be run on a PIC16F877A Micro-controller, which I intend to hook up to a DC Buck Converter.
My last concern is with measuring the current flow in the circuit, it has been suggested that I use a low-side current sensing op-amp. I'm not a particularly analogue-minded person, and could do with some help!
I'm looking to have a shunt resistor of around the order 10 Ohms, and use a 741 as the op-amp, and I'm feeding the op-amp output into a PIC16F877A's ADC input, which has a reference voltage of 5v.
At maximum sunlight, the cell produces about 1.5mA at 5v, and at this level I'd like the output of the 741 to be at the 5v maximum. Does this sound feasible? There seems very little in the way of tutorials on how to design these circuits.
I very much appreciate your help,
Lee
I'm new to this forum but it has already been a great help!
My name is Lee and I'm doing an MSC project in MPPT technologies. I'm looking for some help with the design..
Apologies if this material has been covered before!
I have coded what I believe to be a Perturb and Observe algorithm in C, to be run on a PIC16F877A Micro-controller, which I intend to hook up to a DC Buck Converter.
My last concern is with measuring the current flow in the circuit, it has been suggested that I use a low-side current sensing op-amp. I'm not a particularly analogue-minded person, and could do with some help!
I'm looking to have a shunt resistor of around the order 10 Ohms, and use a 741 as the op-amp, and I'm feeding the op-amp output into a PIC16F877A's ADC input, which has a reference voltage of 5v.
At maximum sunlight, the cell produces about 1.5mA at 5v, and at this level I'd like the output of the 741 to be at the 5v maximum. Does this sound feasible? There seems very little in the way of tutorials on how to design these circuits.
I very much appreciate your help,
Lee