Positive Edge Triggering

[Anonymous]

Hey friends
I think this would be helpful for all.

Sometimes when people use latch trigger in their circuit to take one input in a clock cycle, they face a problem that their circuit takes many inputs rather than one. And this problem can be solved by making circuit edge triggered. And edge triggered circuit takes only one input at a time.
 

This circuit has just one capacitor, one resistance and tactile switch. Edge trigging is mostly used as intermediate in a circuit.

Positive edge trigger works when clock changes its state from 0 to 1.

In this circuit, I used a tactile switch whose one leg is connected to Vcc and other one goes to a resistance. and other pin of resistance goes to ground. And one pin of capacitor is connected to node point of tactile switch and resistance and other pin of capacitor gives output for edge trigger.

This circuit works on a simple principle of charging and discharging of capacitor. As you press the tactile switch capacitor gets charged and after getting charged it blocks the D.C. and discharged immediately due to the path of resistance. The result of this is we just get a pulse which is required for edge trigging. 

Note: Here the value of resistance (R) =330ohm and capacitor (C)=.1uF, So RC=33 usec

This means that your clock must be slower than 33 usec. 

 

[dagakshay]

ohhh… really nice one thank you nikhil 

[Author]

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