This crystal configuration can be made with triggers of any logic. The frequency is given by the formula next to the diagram. This setting is specifically for TTL.
Activating a relay from pulses (from a monostable, for example) can be useful in many types of...
This project uses an unusual integrated circuit that consists of a programmed timer. The circuit was...
I found this circuit in a Popular Electronics from 1992. The circuit shows how we can receive...