Damped tone generator (CB8842E)

This circuit uses an unusual electromechanical component: a mechanical blade resonator. The circuit is from a 1965’s Electronic Design.

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Series Multivibrator (CB10376E)
This circuit was obtained in a 1975 magazine and can be implemented with BC548 transistors. The...
Signal generator (CB21057E)
Found in Popular Electronics, this '90s circuit generates harmonic-rich signals for testing audio...
Current Booster (CB8994E)
This configuration can be applied to other operational amplifiers to increase the current...