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Building upon my last video, I’ve decided to make a simple circuit using some op-amps.  One is the general op-amp LM741. The other is a specific op-amp, LM386, that is designed for audio amplification.

This circuit can be used to amplify microphones or be used as a circuit sniffer depending on what you connect to it.  There is a lot of room for experimentation with this circuit to make it work for different applications.  In the video I go over how to make a sniffer probe that can be used in DC electronics troubleshooting.

The schematic for the project can be found here:

See the full series here.

Ryan Slaugh

Ryan Slaugh is a hardware and software engineer with over 15 years of experience designing and building different systems. While he has a few college degrees, his best training came from growing up on a farm and working with his father who was also an electrician. Ryan works regularly with woodworking, metal work, electronics, and software. Ryan also has a love of tools and collects as many as he can.


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