Summary

00:00 - Jason Norwood has asked, how many wires can you branch off one five volt reference? The important thing to understand when you are looking at the five volt supply for a sensor, the actual current draw, so this is the limitation really, the actual current draw is almost insignificant.
00:18 Very very low current draw, so on this basis we're not actually powering an actuator or something of that nature off those five volt supplies, so you can actually run a pretty large number of sensors off a single five volt supply, it's not really an issue.
00:32 I've never struck a problem where I'm really trying to run too many sensors and I'm uncomfortable with the number so yeah not really an issue.
00:41 What you will find as well is that most ECU manufacturers that are building an ECU that has a larger amount of IO so the ability to wire more sensors into it, the ability to drive more actuators on the output side, because they know that they're going to have more sensors wired into that ECU, they're more likely to have multiple five volt feeds.
01:03 Now that's not strictly because it's essential, you could still run all of your sensors off a single five volt feed.
01:10 But it becomes really messy trying to branch all those out or splice all those out from a single wire so this becomes just a bit neater, a little bit easier, and a little bit more manageable if we're branching from multiple five volt sensor supplies.
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