Applications for this circuit include hearing aid, stethoscope, etc. Transistors are general purpose and powered by a single 1.5 V battery.
We found this different configuration that uses a fluorescent lamp as a negative resistance device...
This circuit was obtained in an 80's Siliconix documentation. The circuit can be used as a shield,...
The purpose of this circuit is to imitate the dripping of a faucet. The circuit was found in a...