I'm doing some microcontroller development, mainly for education and as a hobbyist.
So far I have powered it all from USB-power or 5V wall warts and regulated it down with 1117's or similar regulators.
At his point I want to be able to drive my projects from different voltage levels, both for testing and to be able to use different voltage levels as power source. I also would like to be able to draw more than the odd 1A you can get from the USB port. (Not mainly for the controllers but for some peripherals)
My thought is to get a variable bench power supply.
Are there any certain things I need to consider except the obvious power/current ratings?
Would a base version of an el cheapo brand for 50€ be sufficient or do I need better filtering/protection?