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View Full Version : BS2 survived 8v on VDD for a year !



Peter KG6LSE
01-26-2010, 09:21 PM
Ok I have a HW board that I used for the T Box (T Hunt controller) .

My radio's mic plug puts out 8V to run the Mic's guts so I taped in to it for my T Box .
I ran the power to V in as its not 5V ..
and it ran great for many months off that power input .

Un known to me I tied Vin to VDD from a solder bridge .....Opps!
so the whole time Vdd was getting 8V!
.. So yesterday I was going to run the T Box off a the radios 12V in because i am using it with a radio that has no Mic Power out
.
And I did not want to kill my 9V Batt
it worked for 4 seconds and Poof !

there goes the stamp !
now its dead..

but I am amazed that for a year that thing ran with out issues on the 8 volts I fed it and did not choke right then anf there

and only after I put 12V to it did it fail



Peter KG6LSE

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"Carpe Ducktum" "seize the tape!!"
peterthethinker.com/tesla/Venom/Venom.html (http://peterthethinker.com/tesla/Venom/Venom.html)
Never underestimate the bandwidth of a station wagon full of tapes hurtling down the highway. —Tanenbaum, Andrew S.
LOL

dandreae
01-26-2010, 10:27 PM
Hi Peter,

Great story!· Send me an e-mail at dandreae@parallax.com (mailto:dandreae@parallax.com) and we'll see what we can do to get you up and running again.

Dave

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Dave Andreae

Parallax Tech Support·

James Long
01-26-2010, 10:33 PM
Wow......that is impressive.

Trying to boost the Stamp with 160% power......... http://forums.parallax.com/images/smilies/smilewinkgrin.gif

That is cool though...I'm surprised it ran that long. Show you that Parallax does look at what parts they put in their products.

James L

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James L
Partner/Designer
Lil Brother SMT Assembly Services (http://www.lil-brother.com)

Are you addicted to technology or Micro-controllers..... then checkout the forums at Savage Circuits (http://www.savagecircuits.com). Learn to build your own Gizmos!

Peter KG6LSE
01-29-2010, 09:43 AM
Ok I was gutting the board for its Dsub and reset Tact switch and I had a idea ! the BS2 has a brown out detector .

what if it died from the Over Voltage incendent ...
So in typical "Peter'olgy" sense I removed it just as a last cause ....
I applied a 9 V batt (mind you I removed the short by now )
and behold the LED Power light is coming on !!!
and 5V is back on the VDD !
So I added a speaker to where the audio out is for the transmitter.. and its putting out the Morse code I wrote to it when I made it !
OMG it has risen from the dead !

So I am putting the Dsub back on and the Reset Tact switch and seeing if this thing will live a few more years...



What harm could removing the brownout chip do ?

My guess's it will not like being underpowered .. ever ..
I will add photos as soon as I get my cam back from a friend..
Peter KG6LSE .

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"Carpe Ducktum" "seize the tape!!"
peterthethinker.com/tesla/Venom/Venom.html (http://peterthethinker.com/tesla/Venom/Venom.html)
Never underestimate the bandwidth of a station wagon full of tapes hurtling down the highway. —Tanenbaum, Andrew S.
LOL

Peter KG6LSE
01-31-2010, 03:59 AM
Ok it is working BUT it will not take a new programs so its stuck as a Thunt Tbox for the rest of its life ..
.. Peter KG6LSE

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
"Carpe Ducktum" "seize the tape!!"
peterthethinker.com/tesla/Venom/Venom.html (http://peterthethinker.com/tesla/Venom/Venom.html)
Never underestimate the bandwidth of a station wagon full of tapes hurtling down the highway. —Tanenbaum, Andrew S.
LOL