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Digital oscilloscope with LCD screen

I tried to make simple and cheap oscilloscope using common parts from today’s component retailers. When creating, I tried to reduce the number of parts, while maintaining the minimum necessary for the functionality of an oscilloscope - for different settings and troubleshooting of power converters , household appliances control circuits , for the study of different devices, where not required accurate measurements and high frequencies , and you just need to look at the waveform , up to 200 … 300kHz.”

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