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ATTiny44 Based Shifty VU Meter Controller (MAKE2008)
Schematic and circuit board design for the Shifty VU Controller. Designed for an Altoids tin chassis, the analog section includes a stereo full-wave rectifier made with a quad rail-to-rail opamp, with logic FET switched capacitors to adjust the rectifier output’s rolloff delay.
shifty_vu_controller_schema.png
Posted by rmrubin 
April 2008