Need to down convert dc

R

raflyer

New Member

• Dec 29, 2009

• #1

Hi all,
I need to take a variable 0-5dc output and change to a 0 - 100mV output with high resolution. Any idea on a very simple circuit? I am basically making a fake K-type thermocouple signal to drive and test an EGT gauge.
Thanks,
Rob

 

MikeMl

Well-Known Member

Most Helpful Member

• Dec 29, 2009

• #2

Here you go:

 

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Last edited: Dec 29, 2009

R

raflyer

New Member

• Dec 29, 2009

• #3

Thank you!

 

MikeMl

Well-Known Member

Most Helpful Member

• Dec 29, 2009

• #4

I simplified the circuit. Look again.

 

R

raflyer

New Member

• Dec 29, 2009

• #5

Even better, thanks!

 

MikeMl

Well-Known Member

Most Helpful Member

• Dec 29, 2009

• #6

Actuallly, if you have a regulated, adjustable power supply, then just a voltage divider consisting of a 10Ω resistor to ground, and a 470 Ω to the Plus supply terminal would do it, too. Just vary the supply voltage from 0 to 5V to simulate the thermocouple...

ps, there are only a few folks on here that know what an EGT is

 

Last edited: Dec 29, 2009

S

shortbus=

Well-Known Member

Most Helpful Member

• Dec 29, 2009

• #7

exhaust gas temperature

 

Last edited: Dec 29, 2009