Using the USB port to obtain 9V DC

摘要

I purchased the 3V-to-9V DC Converter (Silicon Chip, March 2004). I would like to use a laptop USB port to power a 9V 80mA load and as the kit design is for a 3V input, I was wondering if the kit needs to be changed in any way so that it can be fed with the USB port's 5V? (G. D., via email).