brown out resets

[mackrackit]

I would try something like.
If rpm is less than X then disable the INTCON.

Calculating power from the RPMs. Setup a timer to read the rpm evert so many seconds, after maybe a 100 reads average the RPMs giving aveage power over that time span??? If the wind is not changing much it should be pretty accurate.

Of you have PBP then you have LONGS. Using MCS? Tell it to compile using PBPL. That can be found under one of the options in the tool bar. MPLAB? When you set the language it should b there.

Yup, the EEPROM has some limits. I have been using a SD card for data logging.
Add a RTC if you do not have one in the project and you have plenty of room on a SD to save the time, RPM, power and what ever else. When you want to just pop it into a PC and chart, display or what ever. Easy way to get data from PIC to PC.

Yup, more babbling

[aratti]

since ive only got picbasic pro and not pbpl it means i cant use LONG. this means i can only get up to 65536, whereeas the number of kwh is gonna be about 200,000 over the 20 years... any ideas on this one?

I don't have long either, this is my turn around:

AA var word
BB var word
CC var word
DD var word

Long:
AA=0
While AA<>BB
AA=AA+1
CC=CC+1
If CC=0 then DD=DD+1
wend

Return

You place your reading in variable BB and gosub long, here your reading will be accumulated in variable CC and DD, that you can save at your discretion.
Reading back the long is simple just (DD x 65536)+CC

Al.

[Archangel]

Hi Robert,
To get a clean PIC reset you could tie the MCLR pin to ground using an NPN transistor and a resistor to + , then on the transistor's base circuit feed it with a suitable capacitor, tied to the generator, when it spins up the transistor will pull the mclr pin low until the cap charges and then turn off.

[ivirscar]

Just use a simple voltage drop detector. I use a 4.5v detect on the supply of my odometers and I've tested the crap out of this application and NEVER fails to write the value to EEPROM once power is disrupted. The volt detector is nothing more than a "switch" to ground thus when it's supply which shares the supply of the pic, goes to 4.5 volts or lower, it will switch any input selected on the pic to low to activate your "save data" routine. Use a capacitor of 220uf to slowly drain the power while giving time to do the action. Once your action is complete, use a resistor or load to complete the cap drain...