This circuit maintains on a flashing LED at a frequency determined by the capacitor. The unijunction transistor can be 2N2646.
This circuit is from 1997 Linear Technology Applications. The circuit uses common components at...
We found this elementary receiver in a 1983 publication, but it can be easily assembled today, as any...
This circuit has a type of bias called "virtual earth" providing good gain, given by R2. The...