Member #466812

Member Since: September 3, 2013

Country: United States

  • Edit: Nevermind. After reading more about the problem with powering from car batteries (that are installed in machines which are running) I will definitely go with the USB charger. The L7812CV is not enough alone.

    Original post: I have bought this one and getting ready for a project. It will be mounted on a tractor lawn mower. Since the alternator puts the voltage up a bit (haven’t measured yet but I guess on 14 volt) I need take it down a bit. Just happened to pick up a ST Microelectronics L7812CV voltage regulator. Datasheet here (view page 7): Assuming the voltage is 14.5 volt or above, should I use this or will I be far better off ripping a no-name USB charger for car lighter socket so I get 5 volt? If using the L7812 is fine, should I use VCC or RAW?

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