Nothing to do with uC: measuring parasitic draw from car battery

Author	Message
thwill Guru Joined: 16/09/2019 Location: United Kingdom Posts: 4398	Posted: 07:49am 16 Aug 2024         Mixtel90 said   Another way, which is very safe, is to simply introduce a 0.1R resistor in the battery lead. Wouldn't that require a 10+ Watt resistor to avoid melting down during what has been described here as a potential 10A startup surge?    P = (I^2)R = (10 * 10) * 0.1 = 10 W Best wishes, Tom