B1 builders thread

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Here is my build with the energizer energi to go battery pack.
 

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turn your pot fully anticlockwise.
Measure across the terminals and find the pair that read near zero. That is the output.
turn the pot halfway round it's travel and find the pair that read the nominal resistance of the pot. That is the input.
One of each of these pair is common to both in & out. That is the Signal Ground.
 
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