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.
Easy repair and teardown of the rather obscure Tektronix DMM916 Multimeter. Ebay auction: https://www.ebay.com.au/itm/225848873343 Forum: …