Hello, I interesting in making a high voltage power supply for capillary electrophoresis. Not much power is required and the DC does not need totally noise free so I figure this gives me a lot of flexibility. I would love the ability to adjust the voltage at 5kv increments in maybe a 5-30kv range. It would be great if the voltage could be adjusted/turned on+off using a microcontroller whether I need analog output or to add a relay/transistor it doesnt matter. Also I would prefer to power this supply using either 5 or 12V DC. Can anyone point me in the right direction? I bet there are some exotic circuits that this would be perfect for. I am looking for something that uses less then 20$ worth of parts, or a commercially available unit for around that price. Any help would be great.