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pyr0ball / pyr0piezo

An AVR/ARM based piezoelectric sensor for use in ultra-precise applications
https://docs.pyroballpcbs.com/
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Wire Gain Amp for series resistor ladder #16

Closed pyr0ball closed 5 years ago

pyr0ball commented 5 years ago

This is a part of the solution to https://github.com/pyr0ball/pyr0piezo/issues/1

Gain for the circuit can be made adjustable by reassigning the linear resistor ladder currently used by the VRef adjustment to the Gain Amp voltage divider.

The current amplification factor is 3, (10k/3.3k), but several values can be created using this topology. I will need to build a test circuit and run some experiments.

pyr0ball commented 5 years ago

Started work in https://github.com/pyr0ball/pyr0piezo/commit/2226025830b979959ceab5072745ae53b767f4f4

pyr0ball commented 5 years ago

Since all of these resistors are now the same value, I'll look into replacing individual resistors with a network package

pyr0ball commented 5 years ago

Confirmed this method works on breadboard. Implemented for Rev.2.x+