In the figure we have a good rectangular signals generator with several frequency bands. The circuit is based on old logic but can be implemented with modern equivalents.
S The purpose of this circuit, found in a 1975 publication, is to suppress the noise that occurs when...
In the figure we have a negative power circuit for SCR and unijunction transistor suggested by...
This circuit was found in a Popular Electronics of the 90s. The resistor R4 determines the load...