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Questions tagged [pir]

A passive infrared sensor (PIR sensor) is an electronic sensor that measures infrared (IR) light radiating from objects in its field of view. They are most often used in PIR-based motion detectors.

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NPN circuit to switch 12v 1A DC load by 3.3v 1A DC using PIR

I am trying to switch on a circuit using PIR motion detection. I have a PIR module which outputs 3.3v 1A DC when it detects a motion. I want to switch on a circuit rated at 12v 1A DC. I read some ...
Amit Kumar's user avatar
1 vote
0 answers

Triggering 12v Relay with HC-SR501 PIR sensor

I have a SRD-12VDC-SL-C relay with this configuration: And I want to trigger it with PIR Motion Sensor Detector Module HC-SR501 ...
Mohak Shukla's user avatar
6 votes
1 answer

How can I amplify PIR output to 5V

I need help with a project. I want to make a circuit to work as a night-time motion detector circuit that will power several LEDs. I bought: 1 LDR some NPN transistors BC547 and 2N3904 some resistors ...
panayiotis kasapis's user avatar
4 votes
2 answers

XBee and PIR sensor

I've ordered XBee wireless transceiver and PIR (motion, here is link) sensor. When I enable DIO0 digital input port on XBee with "ATD0 3" command it becomes high. I measure it with volmeter and get ...
Volodymyr Smirnov's user avatar
3 votes
2 answers

Different ways to detect seals? [closed]

I would like to build an underwater mammal detector to take videos of seals when they get in and out of their cave (the entrance of their cave is underwater). It will be a waterproof sealed box with ...
arthur.sw's user avatar
  • 141
2 votes
4 answers

PIR sensor led strip with N channel mosftet

I have a PIR sensor (HC-SR501) and I want it to turn an led strip(12V 0.8A) on when the sensor detects motion and off when there's no motion. I checked a previous thread which is similar in that ...
Kokachi's user avatar
  • 690
1 vote
1 answer

How do you use a mains PIR with a Raspberry Pi?

I am trying to turn on some LEDs with a Raspberry Pi using PIR. I have purchased, 1200w PIR LEDs Raspberry Pi The PIR provided is slightly different to the one in the listing as it has four ...
James Geddes's user avatar