BEEPER HOMEMADE / DC UP SOUND GENERATOR

The scheme of the Generator on two germanium transistors https://youtu.be/yLfFnxpQ1y8 I slightly altered and, as a result, received the Next device of dual purpose.   Using microdynamics from the computer one germanium and one silicon transistor, I built a miniature sound generator with led indication.

This circuit operates from voltages of 1 volt and up to 12 volts, while making a loud sound and led lights.

I recommend to make such homemade at home!

Good luck all!