Tim Nolan's Arduino MPPT - now with LCD

[harimelath]

Kibi
Please post a better schematic in PDF
Thanks
Hari

[kibi]

This is the best one that I have. I have not worked on this project for a long time, so I have no better versions.

[Earley8]

The 100 micro-F capacitor blew up when I connected a 21.84 V panel to the MPPT.
Would you happen to know why this happened? I am a student attempting to learn about Mr. Nolan's MPPT, so any help would be awesome!

[SeanB]

Either it was connected the wrong way round or it had too low a ripple current rating. If the wrong way round it normally does a confetti shower, overcurrent it normally will run hot then split the vent open. New one use a 63V low ESR unit, it will be bigger. A higher value will also work, anything from 470uF to 1000uF will work there as well, just needs to be low ESR and it will survive.

[Earley8]

Thanks for the quick response.  It blew through the vent, so I will try a 100 micro/ 100 V just to be safe.
As far as the MOSFETs: the IRFIZ44 were unavailable on DigiKey, so I ordered the IRLIZ44 FETs.  They seem to have the same operating parameters; think I will have an issue??

[Earley8]

The IRLIZ44 FETS seem to work fine..  The only difference I notice is the 5V drop instead of the 10V that turns on the switching MOSFET in the schematic (Q2). If anyone knows an easy way of draining a 12 V lead acid battery please let me know.  Thanks for all the posts Kibi!

[SeanB]

I use a 12V 50W downlighter and a socket. Draws 5A nearly and will discharge a common 7Ah unit in under 2 hours. A car headlamp also works.

[retiree]

Hi - a great project. Would it be possible to post a zip file of the brd. file? I am battling to get my layout correct and woul appreciate it

Thanks in advance.

[SAFIX]

Fantastic! how about some help with a 24v PV conversion or is this not on the cards?

Many thanks

[Blesk]

hi could you give here in eagle pcb? THX

[hary]

Just a question :

What happen when MOSFET Q3 is on ?

http://www.timnolan.com/uploads/Arduino%20Solar/ArduinoSolar.pdf

Isn't the battery shortened ? Woudn't we need a rectifying diode somewhere ?

[manfredong]

Can you share with me how you program this device?

[kibi]

As this is Arduino based, ATMEGA328 MCU, I did all the programming on an Arduino Uno, then transferred the MCU to the final board.

[mustapha_kazaure]

Hi mr. Nolan's thank you for all your contribution in this project.
    but sir i dont know i am using i aduino uno R3, i.e am using ATMEGA328 but if i run the code u share it given me this error pls sir i need help out
 "MyMPPT.ino:16:105: error: TimerOne.h: No such file or directory
MyMPPT.ino: In function 'void setup()':
MyMPPT:83: error: 'Timer1' was not declared in this scope
MyMPPT.ino: In function 'void set_pwm_duty()':
MyMPPT:154: error: 'Timer1' was not declared in this scope
MyMPPT:158: error: 'Timer1' was not declared in this scope"
    this is my e-address mustaphamohammed01@gmail.com.

[willbr]

I'm doing this project ... I'll put ethernet shield to send data from arduino!