Hi

One of my friends works on a tree harvester and asked me to make
him a circuit with a 24V output with constant adjustable current between
180mA and 300mA to control a solenoid.  He would like to control the circuit
with a pot.

I do have an idea how to do it, but thought I would ask the experts.

BTW the harvester uses a 24 V battery, so it is only a matter of controlling
the current.

Thanks

Graham