Hardware Suggestions for Interfacing 5V Outputs with 12–30V Control Systems

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A_khila

Joined Apr 20, 2026
1
I am reading a 5‑volt sensor signal, but I need to shift this signal up so it can drive another control system that operates between 12 and 30 VDC. I am looking for a reliable level‑shifting or interface board that can sit between my HIL/mini‑HIL system and the controller under test.

I previously used an opto‑isolator board, but it has not been very reliable and causes some voltage drop. I would appreciate recommendations for development boards or interface modules that can perform this voltage‑level conversion more effectively.
 

Irving

Joined Jan 30, 2016
5,055
Welcome to AAC.

I am reading a 5‑volt sensor signal, but I need to shift this signal up so it can drive another control system that operates between 12 and 30 VDC. I am looking for a reliable level‑shifting or interface board that can sit between my HIL/mini‑HIL system and the controller under test.
What sort of current are you switching, or is it just a control voltage?
Can you share a circuit diagram of your needs?

I previously used an opto‑isolator board, but it has not been very reliable and causes some voltage drop. I would appreciate recommendations for development boards or interface modules that can perform this voltage‑level conversion more effectively.
What is the sensor (or it's output characteristics).
Voltage drop?? where and why is this an issue?
Does the level shift need to be isolated or do they share a solid common ground?
 
Last edited:

drjohsmith

Joined Dec 13, 2021
1,579
I am reading a 5‑volt sensor signal, but I need to shift this signal up so it can drive another control system that operates between 12 and 30 VDC. I am looking for a reliable level‑shifting or interface board that can sit between my HIL/mini‑HIL system and the controller under test.

I previously used an opto‑isolator board, but it has not been very reliable and causes some voltage drop. I would appreciate recommendations for development boards or interface modules that can perform this voltage‑level conversion more effectively.
yes, we need more details..
 

MaxHeadRoom

Joined Jul 18, 2013
30,590
I previously used an opto‑isolator board, but it has not been very reliable and causes some voltage drop. I would appreciate recommendations for development boards or interface modules that can perform this voltage‑level conversion more effectively.
Was that the Opto22 boards and modules?
I have always found these quite stable?
 

BobTPH

Joined Jun 5, 2013
11,482
If you are switching power to a circuit based on the sensor output, a relay is likely the simplest solution.

It sounds like you tried to switch power with an opto isolator that could not handle that level of power, hence the “voltage drop.”
 
I am reading a 5‑volt sensor signal, but I need to shift this signal up so it can drive another control system that operates between 12 and 30 VDC. I am looking for a reliable level‑shifting or interface board that can sit between my HIL/mini‑HIL system and the controller under test.

I previously used an opto‑isolator board, but it has not been very reliable and causes some voltage drop. I would appreciate recommendations for development boards or interface modules that can perform this voltage‑level conversion more effectively.
You have not even mentioned if the "sensor signal" is analog or digital. My guess is Digital, or maybe not. That matters quite a bit.
 
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