I have high-current devices (10 A) of variable resistance and I am researching their current-voltage behavior over time. I want to operate several devices in series using only a single power supply which delivers a constant DC current of 10 A. However, the voltage drop across each device may never exceed 2.5V as this would cause overheating.
So, here are the requirements for my circuit:
- Ideally, 10 A runs through each device (whatever the voltage drop).
- If the resistance of a device increases such that the voltage drop would exceed 2.5 V, it should be held at 2.5 V instead (still drawing current - but now less than 10 A).
- I should be able to disconnect each device from the series circuit without affecting the others.
Below is a simple depiction of the desired circuit which I hope is helpful. I'm looking for circuit elements that are maybe something like a very-high-power Zener diode. Thank you!