Timers with Inverters (CB195E)

Simple timers can be designed using inverters or any other gate that can be connected as inverter. Figure bellow shows how the gates of a 4093 can be used in two types of timers. In [a], when S1 is closed the output of the IC goes to “1" during a time interval determined by R1 and C1. After this interval the output goes to In [b], the output goes to “0" when the switch is closed and after the time interval determined by R1/C1 goes to R1 can be in the range between 10 k ohm and 22 M ohm. The minimum value for C1 is 100 pF. These timers can provide time delays up to 30 minutes depending on the value of the components used.

 

Timers with Inverters
Timers with Inverters

 

 


Circuit Bench