Hey r/explainlikeimfive could someone explain to me how a pull down voltage circuit works? I tried googling it but I can’t make sense of the answers I’m getting.
Thank you in advance!
In: Technology
To use the analogy of water flowing in pipes, a pull down resistor would be like having a tiny pipe that empties into a drain attached to a larger one. If water is flowing in the large pipe, sure some escapes down the tiny pipe, but most goes where the big pipe goes because it is easier. If the big pipe stops flowing, like from closing a valve somewhere, the little pipe will empty the big one of water because no new water is coming in.
Expanding on this a little, there are also pull-up resistor circuits that work the opposite way keeping the big pipe full of water (at some voltage potential) if it isn’t allowed to drain.
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