Led strip fade in and fade out

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zoxzox

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Hello everybody,
I would like to get my 1m led strip 12v to fade in/fade out when power supply is on/off. I have Mosfet IRLB8721, 100kohm resistor and 1000microfarad 16 volt capacitor. Can someone write me how to connect to those components to get fade on/fade out. Is it possible with these components at all? Is there any other simple diy way to make this fading?
Thanks
 

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zoxzox said:
thanks i am watching now, but cant find PIR ? where is it in menu?
Click to expand...
To substitute for the PIR I made a stand-in using a SPDT switch. The spec sheet states the PIR turns On by outputting the supply voltage, however what is its Off state? I don't recall if its Off state goes to ground or high-impedance. You'll have to check what internal switch connections are inside your PIR. It affects how the timing capacitor charges and discharges.

Falstad's component list supports an LDR (light dependent resistor). Its resistance range is adjustable but it helps if we experiment with the simulated device. Click the slider to simulate changing light brightness.
 

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