HEAT again

Andy B

With Respect to my Post HEAT.

I connected a Duracell PP3 9V battery to the connectors that is all.
the chip gets Very hot.

Infact i tried this :-

' HIGH_LOW.BS2
' This simple program sets I/O pin 0 high for 1/2 second and low for
' 1/2 second in an endless loop. Connect an LED to P0 for a simple
' blinker.

' {$STAMP BS2sx}


Main:
HIGH 0
PAUSE 500
LOW 0
PAUSE 500
GOTO Main
END

it downloaded ok ran the program and the little LED flashed for about 5 seconds, then stopped
the chip was so hot, i unplugged the battery.Waited abit and reconnected, No flashy light !!!!!!!

I reconnected to the serial cable COM1 and it recognised the stamp, tokenized it ok but when it went to download said Hardware failure..?

I am sooooooooo STRESSED !!!!!!

KenM

What board is the stamp plugged into.....

The bad news is sounds like you might have toasted your stamp.....I hope not/

Disconnect everything from your stamp pins.....also sounds like one of your outputs might be unintentionally shorted to ground and sending out 5v?

Can you post the entire program....or was that the entire program?

Ken



Don't get discouraged....the Stamp is an awesome micro.

Ken

jakjr

I think that was the entire program, all it supposed to do is flash an LED.

This might sound stupid but... get out a magnifying glass and check out your stamp, maybe one of the leads on the interperter IC came loose and is touching another lead. Although if this is the case I doubt you'll be able to fix it yourself, but at least you'll know thats the problem.

Check out the voltage regulator on your stamp as well, maybe a lead on it came on soldered, if the stamp was getting a full 9 volts (rather than the usuall 5) id imagine it would get a bit hotter. You can check and see if its outputting the right voltage by plugging a jumper wire into vss and another into vdd, set your voltmeter to the proper setting and check it out. Be carefull not to touch the jumpers together, thats liable screw up your stamp, or well screw it up more than it already is.

Post Edited (jakjr) : 8/24/2004 5:22:28 AM GMT

Javalin

Also - put an amp meter in the circuit between the stamp power to the LED. I have found without some resisters some LED's try to draw 150mA! (more than the stamp should handle!)

Bean

You did use a resistor in series with the LED didn't you ?

jakjr

I dont think that would be the problem, from the way it sounds·his stamp·gets hot before anything is even loaded into it.

Andy B said...
I connected a Duracell PP3 9V battery to the connectors that is all.
the chip gets Very hot.

K de Jong

Maybe there is a program in the BS2 chip that activates some pins on which there may be an LED without a resistor.

Small chance but it could be....

Klaus

Chris Savage

I was wondering (I didn't see it in this thread), was the battery connected to Vdd or Vin?



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Chris Savage

Knight Designs
324 West Main Street
P.O. Box 97
Montour Falls, NY 14865
(607) 535-6777

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