Search found 2188 matches

by majenko
Sun Jan 08, 2012 1:29 am
Forum: IDE Integration
Topic: setting multiple bits simultaneously
Replies: 7
Views: 1693

Re: setting multiple bits simultaneously

You should be using "LATB" not "PORTB". PORTB is for reading, LATB is for writing to the output latches.
by majenko
Sat Jan 07, 2012 11:14 pm
Forum: Libraries
Topic: Interrupt-driven timer
Replies: 9
Views: 2996

Re: Interrupt-driven timer

What kind of time period are we talking about?
by majenko
Sat Jan 07, 2012 1:51 pm
Forum: Libraries
Topic: LOL Shield library
Replies: 13
Views: 2499

Re: LOL Shield library

The problem here is that the LOL library has been written specifically to work on ATMEL based Arduino boards. You would need to re-write the library to use the PIC32 chip instead. Specifically the interrupt code (which is probably linked to timer code, so that will need re-writing too). Someone may ...
by majenko
Fri Dec 30, 2011 1:55 am
Forum: chipKIT Boards
Topic: did I brick my board?
Replies: 15
Views: 2080

Re: did I brick my board?

Your pots should be consuming about 300µA of current ;) I too wouldn't expect a soldering iron to cause any problems of this sort. That may be a red herring. Were you soldering with the unit powered up? TBH I would have designed a couple of clamping diodes and absorbing capacitors into the VCMP lin...
by majenko
Fri Dec 30, 2011 1:43 am
Forum: chipKIT Boards
Topic: did I brick my board?
Replies: 15
Views: 2080

Re: did I brick my board?

Yes, I have deciphered that bit of the schematics, and IC5 is being supplied by 5V.
by majenko
Fri Dec 30, 2011 1:40 am
Forum: chipKIT Boards
Topic: did I brick my board?
Replies: 15
Views: 2080

Re: did I brick my board?

IC5? But that's just a simple low-power op-amp. It's purpose is to detect the voltage coming in through the power jack to see if the board should be self or bus powered. All it does is switch a MOSFET (Q1). Hmmm... My guess is that possibly a power spike might have cooked IC5 which is causing a knoc...
by majenko
Fri Dec 30, 2011 1:20 am
Forum: chipKIT Boards
Topic: did I brick my board?
Replies: 15
Views: 2080

Re: did I brick my board?

As for the heat, they should only get very hot if you are drawing lots of current.

The 3.3V one can supplu 500mA, and the 5V one 1A.

If you have a short circuit then the current may ramp up quite drastically causing lots of heat.
by majenko
Fri Dec 30, 2011 1:19 am
Forum: chipKIT Boards
Topic: did I brick my board?
Replies: 15
Views: 2080

Re: did I brick my board?

The data sheet for that voltage regulator is here: http://ww1.microchip.com/downloads/en/DeviceDoc/22026b.pdf According to that the regulator has both short circuit current limiting and over temperature protection. It should be almost impossible to cook it. My guess is that you may have either devel...
by majenko
Fri Dec 30, 2011 1:11 am
Forum: chipKIT Boards
Topic: did I brick my board?
Replies: 15
Views: 2080

Re: did I brick my board?

I don't have one for reference, but looking at the schematics, you could try measuring the voltage between ground and the tab of IC4. That should read 5V. If it does, then check the voltage between ground and pin 8 of IC3. That should read 3.3V. Alternatively, just test the voltages of the +5V and +...
by majenko
Fri Dec 30, 2011 1:01 am
Forum: chipKIT Boards
Topic: did I brick my board?
Replies: 15
Views: 2080

Re: did I brick my board?

Which board do (did?) you have?