Modulating DC signal multiplier

Projects General Guidance
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Hey everybody,

I have a little issue with one of my commercial air conditioning units. It is being controlled by a thermostat that has an input of 24vdc and modulates the output from 2vdc to 16vdc based on the temperature setpoint vs room temperature. The manufacturer has obsoleted this thermostat and since it is a proprietary control, no one else makes a 0-16vdc controller (that I know of). I want to use a thermostat that uses a 0-10vdc modulating reference signal. So, in short, I need a PLC that can amplify/scale a modulating 0-10vdc reference signal to a 0-16vdc reference signal. Is there an Arduino logic that can do this?

Thanks

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amplify/scale a modulating 0-10vdc reference signal to a 0-16vdc

That would be analog circuitry. An operational amplifier with variable gain can be constructed from very few parts. The old but standard LM324 op amp can be used in single supply mode with power supply voltage as high as 32V.

Or, an Arduino can output 0 to 24V using a 24V DAC, like this one. https://store.ncd.io/product/8-channel-i2c-0-24v-analog-to-digital-converter-adc-with-i2c-interface/

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