Homemade electronic telegraph

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Uploaded by on Jan 5, 2011

This is an "open circuit" telegraph. The buzzer is a simple astable mulvibrator with transistors.

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Science & Technology

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Standard YouTube License

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  • @mbro96 yes! :) But if the capacitance is too low, the sound's frequency would be too high to be eard.

  • can the capacitor be home made?

  • @jeriellsworth thank you! I wanted a higher tone, but i didn't have the right capacitor value.

  • I like the sound. Has a little attack.

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