Help with comparator circuit

[rb salyer]

I want to build a comparator cirucit using opamps that will turn on a green led at a specified temperature and while leaving the green led on, turn on a red led at a second temperature. The idea is to provide a user with a visible indication that temps are okay with the green one, but bad things are happening with elevated tempertures with the red one. I have the thermocouple and the voltages that the thermocouple genertes at specific temps.

Anyone help?

Thanks,

rb

 

[ericgibbs]

I want to build a comparator cirucit using opamps that will turn on a green led at a specified temperature and while leaving the green led on, turn on a red led at a second temperature. The idea is to provide a user with a visible indication that temps are okay with the green one, but bad things are happening with elevated tempertures with the red one. I have the thermocouple and the voltages that the thermocouple genertes at specific temps.

Anyone help?

Thanks,

rb

hi,
Get the datasheet for the LM3914.. www.datasheetarchive.com