Here is a video of the build.
Projects from Make: Magazine
Miniature Beeping Circuit Prank
This is a simple circuit project for pranking your friends and coworkers. Every few minutes it emits a brief, high-pitched beep. The beeping gets annoying after awhile, but what is really frustrating is not being able to find it.
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Steps
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Step #1: Circuit Design
- The circuit is a basic 555 timer circuit in astable mode. In this configuration the IC sends a brief pulse to the buzzer every few minutes. The values of the resistors and the capacitor determine how often the buzzer will sound and how long each pulse will be. With the values that I used, it beeps about every 6-7 minutes. (If the capacitor is completely discharged, the first beep may take up to twice as long.)
- Increasing the value of either the capacitor or the resistor between pins 7 and 8 will increase the amount of time between beeps. Increasing the value of the resistor between pins 6 and 7 will increase the length of each beep. Decreasing these values will have the opposite effect.
Hey Jason, can you tell me about how can we fuse the whole house lights by any tools, I mean like we put a coin on the lamp bulb joint (I saw that on an movie) so can you tell me anything, just for prank