When designing a mains power supply for a small load DC circuit, there are plenty of considerations. Small size, efficiency, and cost of materials all spring to mind. Potential lethality seems like it ...

This article is part of the Ideas for Design Series: Vol. 3, No. 6. Low-voltage microcontrollers generally have been powered from a regulated supply, such as 1.8 to 3.6 V, and have very low current ...