Mini Oscilloscope

Build this small oscilloscope. Up to 40KHz (25uS) / 50mV-50V / gain 1-100 / AC-DC / auto-trig / free sweep / 9V operation.

SimpleTronic

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Description

Build this small oscilloscope. Frequency range is up to 40KHz(25uS full screen) In 4 selectable ranges. Input voltage is between 50mVpp and 50Vpp in 2 selectable ranges. Gain is adjustable between 1 and 100. Accepts AC or DC input . Auto-trigger sweep function to "freeze" the wave display. Free sweep is obtained by setting the potentiometer at either extreme setting. Y-axis adjustment to center the wave. Runs from a 9V battery.

Details

Watch the Video:

Schematic:

Features:

Schematic Main Blocks:

Circuit Operation Details:

Charts:

Label the sweep time potentiometer from 0 to 10, and use these charts to read the sweep time ( or frequency ) in the 4 ranges. Do the same for the gain potentiometer.