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aef test - note graphs are in different scales, but a correlation between the audio and DC waveforms can be seen

aef test - note graphs are in different scales, but a correlation between the audio and DC waveforms can be seen

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aaef pcb - printed circuit board layout, ordered from ExpressPCB

aaef pcb - printed circuit board layout, ordered from ExpressPCB

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AAEF - photo of the circuit under test

AAEF - photo of the circuit under test

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aaef circuit - the schematic. Note that besides the scaling and envelope follower circuits, an amplifier was built onto the board for use in the anima

aaef circuit - the schematic. Note that besides the scaling and envelope follower circuits, an amplifier was built onto the board for use in the anima

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djsfantasi

Convert audio to 0-5VDC for ADC by uP

Circuit, PCB layout & test results. Used to process audio and scale for reading by a servo controller microprocessor, so that a servo (connected a mouth of an animatronic) can be controlled by software to match the words being spoken.
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