This is the traditional audio preamp configuration with the National Semiconductor LM382. The circuit has good gain and can be used with magnetic pickups or from signals from an auxiliary input.
To obtain an AND gate we have the configuration shown in the figure. With the values indicated for the...
This circuit has been removed from the component's datasheet. In it we have a monostable or...
Here we have the way to activate two common cathode displays with 4026 integrated circuits. The...