This circuit generates pulses whose frequency depends on C1. The circuit can be powered by voltages from 5 to 15 V. We find this configuration in a Signetics manual.
This circuit with transistors from a 1995 publication. The circuit is powered by a voltage taken...
This 1.5 A circuit has the output voltages adjusted by a selector switch. We found it in a Popular...
We found this different configuration that uses a fluorescent lamp as a negative resistance device...