# How do I get the PIR sensor to output more than 3.3v?

I have a setup where I have a 12V source and a PIR sensor like the one pictured (below) and some LED strips that are rated at 12V that I've mounted under the stair railings. The problem I've hit is that the pir sensor only outputs 3.3V when triggered.

In extreme simplicity (and horror) here's the setup I have:

The sensor - Here's the details page about it.

The infrared sensor operates on a voltage range from 5-20v, but only outputs 3.3V when triggered. The LED strips I have are rated at 12V (though I have tested them to work as low as 7.6V).

By searching around I've gathered that I need to turn up the voltage somehow or get more voltage running through the sensor. I've tried various step-up modules (this is one of them), but most require at least 3.5V and above to work correctly. Is there a way to have the sensor output more than 3.3V when triggered or some other way to make this setup work?

PS: I'm not an electrician, so I appreciate layman terms. I do understand logic though.

PS2: I've read this question, but didn't quite get what the accepted answer suggested.

• Were you going to share the datasheet of the PIR sensor? Dec 6, 2016 at 22:37
• I updated the question with a link to the sensor. Dec 6, 2016 at 22:38
• Use a buffer or inverter from that 3.3 V signal with pullup to your 12 V rail? Dec 6, 2016 at 22:40
• Winny: Are you talking about these? en.wikipedia.org/wiki/Inverter_(logic_gate) - How would you suggest the diagram should look then? Dec 6, 2016 at 22:47
• Transistors can be your friends. Use one as a switch such that the 3.3V signal from the PIR controls the 12V power to your LEDs. There must be 10's, if not 100's, of questions here on this topic. Dec 6, 2016 at 22:51