I have a project I'm needing to power: - 12V for LED light strip and servo - 5V for DHT11 and fingerprint sensor - 3V for a radio module
I've purchased a bi-direction voltage translator from 5V to 3.3V, so I think I'm good with the radio. However, what is the best way to deal with the 12V and 5V power supply design?
I have a nice 12V power supply and was looking at these types of power supplies: 1) http://www.ebay.com/itm/MB102-Breadboard-Power-Supply-Module-3-3V-5V-F-Solderless-Arduino-mini-usb-/321557647999 - or - 2) http://www.ebay.com/itm/MB102-Breadboard-Power-Supply-Module-3-3V-5V-For-Arduino-Board-/171044190923
I could tap off of the 12V before it goes to this module and end up getting options for 3.3V and 5V for anything in the future. Since I may also shift over to a 3.3V Aduino, I may need a 5V power supply anyway.
Question I have is: 1) do a voltage divider 2) purchase a power supply like this or another you recommend 3) something else I haven't called out here.