Forums » General Electronics Discussion

I am having trouble making this work. Does anyone have any suggestions?

I am trying to make a circuit that will delay a led coming on depending on the resistance value set by the pot.

In theory i want the capacitor to slowly fill up till a voltage is reached that will trigger the gate in the transistor and then allow voltage to flow.

According to the simulator the gate is opened as soon as there is voltage.

https://www.circuitlab.com/circuit/9hcqs3/delay-on/

Crude and wastes power:

Not much better:

Better:

Best ...

... -ish.

Have fun.