Quote:
Originally Posted by Jeg
I tested lm358 and now the output of diff can go down to zero. Thanks Franco
JH the inside boards. The pink one is a dc to dc boost converter for 2.5 euros. It takes the 3,7V of the battery to 16V and then i drive with that my regulators.
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The DC / DC converter generates disturbances, since it is in practice an oscillator, in high gain circuits it can be a problem, I suggest to use 2 batteries in series of 9 V, since the absorption is a few tens of mA.