I, Screechy
A light-sensitive oscillator toy.
Beeper/Buzzer
A Simple Trip Wire
With a few easy steps build a trip wire!
Anti-Robber Pressure Pad
Use a simple circuit and paper crafts to make your own burglar alarm! Here’s how.
A light-sensitive oscillator toy.
With a few easy steps build a trip wire!
Use a simple circuit and paper crafts to make your own burglar alarm! Here’s how.
