AVRSo I'm doing a few audio based projects theses days , just some simple fun stuff. One of those projects will be revising uPre's design to include PCB mounted potentiometers for tone and level control. Two versions will be produced, one with a pot that contains an integrated on/off switch for turning on the preamp by increasing the level and a version without this switch that can be packaged in a hammond box as an electric instrument effect. Expect more to come on how the existing design works and updates on the new one!
BTW V2 Schematic:
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