Especially admirable is the low cost, the battery life, and the audio quality of these devices. This circuit bending hack takes advantage of those audio circuits by turning the Alphabet Pal into ...

This is a great project for a slow afternoon, or a beginners introduction to DIY. [William] shows off a really simple speaker project that results in a light show as well as a decent enclosure.

The key lies in using an acoustic metasurface—a specialized sound-bending material—paired with two ultrasonic transducers. Each transducer generates a nonlinear ultrasonic beam that is ...

Rewiring audio toys to make new sounds. It involves exposing the circuit board in a device such as a Texas Instruments "Speak & Spell" toy and short circuiting leads until an unusual sound is ...