What's inside an EC Apparatus brand constant voltage constant current power supply used for Electrophoresis - the separation of particles in a fluid by using an electric field.
You can get these supplies quite cheaply on ebay if you look around.
A quick reverse engineering of the circuit provides some insight into what's happening.
Datasheets:
Forum: /
EEVblog Main Web Site:
EEVblog Amazon Store:
Donations:
/
Projects:
/
Electronics Info Wiki:
/