What is the importance of the upper resistor in this circuit

[Syndy]

The book also says you can increase the time delay by increasing the resistance of the upper resistor , why, what does it do?

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[phinds]

You need to study basic RC circuits. Think about this circuit with nothing but the upper resistor and the capacitor/switch pair (and a voltage applied across the two in series. What does this circuit do?

 

[davenn]

The book also says you can increase the time delay by increasing the resistance of the upper resistor , why, what does it do?

increasing the value of the upper resistor ( the one currently marked 22k) decreases the current flow to the capacitor
and therefore the capacitor takes longer to charge up

Dave

 

[Syndy]

Ok the explanation is clear. Thank you very much.