Converting negative voltage to positive digital voltage and

C

Christopher Koeber

Guest
Dear All,
I read in an earlier post that in order to get positive voltage from a
negative input I can use two resistors to do so. Is that really true? I have
a +12volt constant coming to a device, yet it send out a negative 200mA
output for a half-second. I need that output to be turned positive and
digital to be read by another device. Any help or suggestions? Thank you
very much for your help, it is greatly appreciated.
Sincerely,
Christopher Koeber
 
"Christopher Koeber" <c_koeber@myrealbox.com> wrote in message
news:TsWdnb7E3pkRPQ_fRVn-gA@comcast.com...
Dear All,
I read in an earlier post that in order to get positive voltage from a
negative input I can use two resistors to do so. Is that really true? I
have a +12volt constant coming to a device, yet it send out a negative
200mA output for a half-second. I need that output to be turned positive
and digital to be read by another device. Any help or suggestions? Thank
you very much for your help, it is greatly appreciated.
Click to expand...
Is the negative pulse actually going negative, or is it going from +12V to
0V?

Leon
--
Leon Heller, G1HSM
http://www.geocities.com/leon_heller
 
"Leon Heller" <leon.heller@dsl.pipex.com> wrote in message
news:NJidnb2Uk5fPKA_fRVnyjg@pipex.net...
"Christopher Koeber" <c_koeber@myrealbox.com> wrote in message
news:TsWdnb7E3pkRPQ_fRVn-gA@comcast.com...
Dear All,
I read in an earlier post that in order to get positive voltage from a
negative input I can use two resistors to do so. Is that really true? I
have a +12volt constant coming to a device, yet it send out a negative
200mA output for a half-second. I need that output to be turned positive
and digital to be read by another device. Any help or suggestions? Thank
you very much for your help, it is greatly appreciated.

Is the negative pulse actually going negative, or is it going from +12V to
0V?
Click to expand...
The numbers that I gave you are straight from the device's manual. It
specifically says (+) 12V constant for the power and (-) 200mA 500 ms on the
line that sends the signal. Unless I am reading it wrong I think that is
what it says. Thank you.

Christopher Koeber
Leon
--
Leon Heller, G1HSM
http://www.geocities.com/leon_heller
Click to expand...
 
Christopher Koeber wrote:

"Leon Heller" <leon.heller@dsl.pipex.com> wrote in message
news:NJidnb2Uk5fPKA_fRVnyjg@pipex.net...

"Christopher Koeber" <c_koeber@myrealbox.com> wrote in message
news:TsWdnb7E3pkRPQ_fRVn-gA@comcast.com...

Dear All,
I read in an earlier post that in order to get positive voltage from a
negative input I can use two resistors to do so. Is that really true? I
have a +12volt constant coming to a device, yet it send out a negative
200mA output for a half-second. I need that output to be turned positive
and digital to be read by another device. Any help or suggestions? Thank
you very much for your help, it is greatly appreciated.

Is the negative pulse actually going negative, or is it going from +12V to
0V?


The numbers that I gave you are straight from the device's manual. It
specifically says (+) 12V constant for the power and (-) 200mA 500 ms on the
line that sends the signal. Unless I am reading it wrong I think that is
what it says. Thank you.

Christopher Koeber

Leon
--
Leon Heller, G1HSM
http://www.geocities.com/leon_heller




Hmmm, maybe if you could read the original in Japanese. Sounds like
Click to expand...
they want a 500ms pull down pulse from the 12 volts, and a sink current
of 200 ma. This would make sense. In simplest terms, a pushbotton from
the signal line to ground.

--
Luhan Monat: luhanis(at)yahoo(dot)com
http://members.cox.net/berniekm
"Any sufficiently advanced magick is
indistinguishable from technology."
 
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