I'm working to power a micro controller that requires something like a USB power supply - 5VDC with a normal draw of .75 - 1 amp but could possibly draw as much as 1.5 amps.
I know that with smaller voltages such as a 9V battery it would be possible to use something like a 7805 Voltage Regulator but sacman has mentioned:
I just found out that these Regulators will stop regulating somewhere between 7v and 7.5v
Since I'm not going from AC->DC I don't need a (bridge) rectifier, right? But do I still need a (step down?) transformer or for a relatively low power draw like this are there other methods? If so,
- Which method would be the smallest?
- Which would be the least expensive?
- Would it be the same answer if I had a 50VDC input voltage instead of 40VDC?
I did search this site for related questions but mostly found things that were AC->DC or low->high.