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A noob question on electrical circuits and polarity

Posted: May 04 2021 9:13am
by Charlie Whiskey
Context is I'm trying to rig up a relay for my TSDZ2 motor system to power a front light, and I realised how basic my understanding of electrical circuits is so please bear with me... :wink:

1. If you're connecting two batteries in series you connect the +ve of one cell to the -ve of the other.
2. but if you're connecting a consumer device (say an LED, or anything with a red and black wire) the convention is the other way around and that the +ve of the consumer device is connected to the +ve of the battery is that right?!