H bridge

Alec_t

Joined Sep 17, 2013
10,715
You apply a voltage to either input. The value and polarity of that voltage will depend on the properties of whatever those big triangular things are. Presumably they're buffers/level-shifters.
 

Alec_t

Joined Sep 17, 2013
10,715
You choose sensors which provide outputs appropriate, or can be conditioned to be appropriate, for the inputs of those triangular things.
 
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