To illustrate the circuit-bending concept, Walters does a quick demonstration using a junked Casio and the aforementioned tools, adding a photo resistor and connecting points with alligator clips.

Circuit bending is the process of taking a small electronic toy or musical instrument, soldering wires to pads on the PCB, and hoping the sounds it produces will be cool. It’s not a science b… ...

For George Gleixner, it's a homemade battery-powered synthesizer. One that's constructed using a circuit bent a children's Hing Hon EK-001 squarewave keyboard no less. What's circuit bending you ask?

These $70 DIY synthesizers are a hobbyist's dream Moogfest's Circuit Bending Challenge invites anyone to build a synth on a shoestring budget.