Tone Oscillator (CB22066E)

Found in old documentation, this oscillator with the LM380 produces an audio tone in a speaker. Frequency is set in VR1.

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April 2017 - The new Recon Jet ™ Pro which is Smart Glasses from Intel® can be obtained from...
One Transistor Alarm (CB914E)
This one-transistor alarm can be used with much more sensors than the two shown by the figure....
Miniature Flasher (CB6251E)
This Popular Electronics circuit can be found in various versions on this site and in this...