| // EDITOR'S NOTES
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| // PROJECT
Twin-T Oscillator Configuration Electrical engineer Larry Cicchinelli has been provided technical support at an educational radio station ever since retiring in 2013. For audio circuit debugging and testing, he uses a DIY battery-powered oscillator/volume unit (VU) meter. 
"Originally, I was only going to build the audio source. When I thought about how I would use the unit, it occurred to me that the device should have a display," Cicchinelli noted.
"I decided to design and build an easy-to-use unit that would combine a calibrated audio source with a level display. Then, I would have a single, battery-powered instrument to do some significant audio circuit testing and debugging."
For his oscillator, Cicchinelli implemented a Twin-T configuration with a minor modification.
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