What do you do?
Submit the “Stuff” you have created! Share project ideas, completed projects and project horror stories in each of the three main categories listed below!
Submit the “Stuff” you have created! Share project ideas, completed projects and project horror stories in each of the three main categories listed below!

a bit cryptic. The microphone drives a vibrator motor - I guess…..
So, when the mike senses sound, it shakes.
@Geo: This is built on a flashlight that charges its battery when you shake it. The final device is charged by shaking, and repeats what it hears using the speaker. It can’t save or record sound, it just repeats it as it hears it.
It is a mini PA amplifier, if you want to call it that. It is powered by a shake flashlight.
It should have been called a “Shake Megaphone”.
Why do so many post projects without descriptions?
I don’t think Microphone was a necessarily a misnomer Steve, on one of the many purposes of a mic is to amplify sound, its not exclusively used for recording.
Microphones don’t amplify sound, they convert it.
Liked the detail of the video, but I think a better practice would be to take advantage of the tie points and do any jumpering on the top side of the board with insulated wires. Looks like the apparently uninsulated jumpers on the bottom in the video could short out. This comment applies to the Joke-A-Tron as well, which is a project I would rather build (don’t see much use for this one).
It should be noted that the circle on the chip should correspond, in this schematic, with a mark on the chip. Hopefully the drawing represents the actual physical layout of the chip - otherwise the pin numbers are missing. Also, builders would have only a 50-50 chance of getting the power right where the LED used to be connected unless they knew or measured the polarity. If wrong it obviously wouldn’t work and may damage the chip.
Dan
A Radio Shack employee, well, 30 years ago, that is!
can anyone tell me where he connected the speaker, MIC, and the power. im new to this so im kinda confuse since they didnt write down were to connect them in the schematic, or i just dont understand. from the speaker, the negative side, were does it go? were does the positive side of the 10ohm resistor go? were would one connect the battery or power?
hmm very awsome you could use this as a spy ear for listening through doors
can be use as unlimitted life hearing aid
where is a good place to learn to read schematics at?