3 ms·
You could just use the middle connection between the two batteries as a ground. I'm not sure why he didn't do it. Perhaps so that the whole thing works longer e
by megous 8y ago
You could just use the middle connection between the two batteries as a ground. I'm not sure why he didn't do it. Perhaps so that the whole thing works longer even if one of the batteries is discharged faster. That would be my guess.
- mannykannot 8y agoAs it stands, 40% of its 23mA current draw is through the 1kΩ x 2 voltage divider... Now I am wondering if a circuit with the between-battery link connected to ground would risk damaging the op amps (or phones) if only one battery was in?