Hi I have several circuits that I would like to permanently mount. There are many power supply options on the market but I'm looking to build some myself that are matched to the application or find the best units in terms of efficiency and low purchase cost. For example I have an Arduino clock which requires 5v and peaks at 100ma, this circuit would be exclusive to the power supply so filtering and other features may prove redundant. All my circuits are 5v DC and no more than 1A. All comments and opinions are appreciated.