Found in Popular Electronics from the 90s, this circuit has LED indicators that show when the battery is full charged and the shutdown relay is activated.
This is another practical idea found in a 1997 documentation. This circuit allows a DJ to change the...
The circuit shown in the figure is suggested by Texas Instruments and allows data transmission on TTL devices...
The 5 outputs of the internal 4018 integrated flop flops can be used simultaneously for the...