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This weekend, make Mousey The Junkbot, a cute little light sensing robot that will skitter across your floors like a real mouse! This project was in Make: Volume 2 and was conceived and written by Gareth Branwyn of

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Mousey is a mouse made of scavenged materials. Above is a common LM 386 Op Amp which is the chip that balances the input from the IR emitters to make the robot light seeking. If you’re not a scavenger you can also get the parts from

Weekend Projects is sponsored by Microchip Technology. Check out their seminars and 16 bit contest.

Make sure to download the pdf and read the article for all the background and step by step instructions! If you want to get the Make: Video Podcast and PDFcast downloaded automatically, you can subscribe in itunes. – Link


Mousey the Junkbot on Make: Projects

  • Enk1du

    This is almost exactly what we did in my ECE 112 class at Oregon State University. The program is called Tekbots, check it out:

  • Hassan M. Maher

    I just started reading the PDF , you realy did a great job to make it easy reading , understanding , thanks you very much

  • stephen

    Hey Bre,
    i’m sortof noobish with this kind of stuff, but i was wondering if i could use a dual op amp?

  • Xanderphillips

    How hard would it be to change out the light sensors to be microphones to have it seek out the loudest sound in an area? I’m thinking that the limited ‘smarts’ of the system would make that near impossible without alot more electronics being involved.

    Thanks for all the great tinkering!