Cell Phone Oscilloscope

A preamp to use a cellphone mic input as a basic oscilloscope. Protects the phone from nasty voltages. <40V, <20kHz

johnowhitaker

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Description

All the relevant details to make this are on the brilliant instructable found here: http://www.instructables.com/id/A-Preamplifier-for-Smartphone-Oscilloscopes/
I cut a few corners, but want to improve on the design as I use it and see it's shortcomings. I will also integrate it into another project I'm planning...