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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How to use a PIR motion sensor to light up a 3.8 VDC bulb using battery and relay
I would like to detect motion to turn off my 3.8 V, 0.3 A DC light bulb using a PIR motion sensor.
Recently I tried to connect it to a 5 V relay, Arduino Uno, and two 3.7 V Li-ion batteries, and the ...
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Passive Infrared (PIR) Motion Sensor
I want to have the PIR Motion Sensor:
https://www.adafruit.com/product/189
Used to turn on a light whenever it detects motion.
Simple enough, but would it be possible to have this done wirelessly?
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Temperature-based motion sensor responding to a specific temperature range
I'm looking for possible options for a very specific temperature-based sensor, which could be used not just for movement detection (like PIR) but also to detect an object of a specific temperature ...
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Connecting a 240 V PIR motion detector to a Raspberry Pi
I want to connect a 240 V PIR motion detector directly to my Raspberry Pi 3.
Inside its plastic case I found two PCBs. One is the power supply board which has a 24 VDC relay, an S9013 NPN transistor, ...
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PIR triggers relay without motion
simulate this circuit – Schematic created using CircuitLab
I'm using a HC-SR501 PIR sensor and a 12V relay to switch between green (NO) and red (NC) on a LED strip, everything being powered by ...
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What do I need to make this circuit work?
I’m trying to light two 2.2V 20mA LEDs using a 9 volt battery, a PIR motion sensor and a transistor.
Wired as shown with 9 volts applied at the collector and the 3.3 volt signal from the PIR applied ...
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How to wire a PIR sensor that requires neutral when local does not have one? [closed]
I have a PIR sensor/switch with the below wiring diagram. The way my lights were configured is that the load (LED light with transformer) is on the wire, so I only have two wires available instead of ...
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What is a suitable resistor value for this circuit?
See the small circuit of a PIR motion sensor below. I've tried to find more than one circuit online but every single time it shows a different value for the resistor.
I would be grateful if anyone can ...
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HC SR501 PIR false triggers
I'm using this circuit as one bit memory for PIR sensor state. This way I can read PIR triggers when I wake ESP8266 from deepsleep. The circuit is working fine, however I get false trigger each time ...
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HC-SR501 PIR sensor range issue
I installed a PIR sesnor for multiple rooms in my house and they worked perfectly for the past six months. I recently noticed a change in their performance. They barely detect my movement even if I'...
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Problem with LDR + PIR
I am using a TEMT6000 LDR and a PIR to turn on outdoor lighting, well that's the plan. The LDR and PIR are in the same housing, and after some searching on forums, I found that I can combine the V-...
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A few questions on PIRs and other motion detectors
I grew up incorrectly believing that motion detectors (as part of burglar alarm systems) were designed to detect movement, when in actual fact it is the movement of a heated (like body heat) object ...
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How to connect multiple digital sensors with single wire?
I am new to Arduino, and I have a problem that I can't solve on my own.
I am trying to connect multiple PIR motion sensors with a single wire, in parallel and onto one pin on my Arduino.
I am thinking ...
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Connect DC 6-30V 1-Way Relay Module Power-off Trigger Delay Cycle Timer Switch with PIR Motion sensor?
I am trying to connect a DC 6-30V 1-Way Relay Module Power-off Trigger Delay Cycle Timer Switch with an HC-SR501 Infrared PIR Motion Sensor Module.
The output of the motion sensor is only 3 V. Do you ...
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Need help building simple burglar alarm circuit
I'm trying to build a simple burglar alarm circuit and I've found one online that uses a knife switch, 9 V power source and an SCR. I'm trying to change it over to a PIR motion sensor but am unsure ...
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PIR sensor bypass for LED light strip
I don't know that much about electronics, but I was able to put together this PIR module:
(original)
and a LED strip and everything works just fine, when the PIR detects motion, it turns the strip ...
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Motion sensor to detect birds and small animals but ignore humans
I would like to develop a motion activated sprinkler to deter birds (cranes and other smaller birds) and small animals from eating the fish in my pond. I am using the approach of controlling a ...
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PIR sensor amplifier with minimum component count
I'm new to opamps and I could use some help amplifying a PIR sensor and output to a microcontroller.
Minimum component count without compromising performance (highly integrated solutions).
Here is a ...
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How to get immediate state of DYP-ME003DD PIR sensor?
I am trying to detect movement for a project and have a DYP-ME003DD PIR sensor.
It has 4 pins, +,-,CDS (I think this is what it says, it's hard to read) & OUT.
When I connect it to my Arduino and ...
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SR501 PIR Motion sensor outputs high voltage in signal pin
I have connected a SR501 is powered by 5v converted from 12v through 7805 voltage regulator. The output voltage on the signal pin is normally 5v and on high it outputs 8v. This makes my relay module ...
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How to manipulate a PIR sensor?
The passive infrared (PIR) motion sensor detects movement of infrared light sources with wavelengths ranging from 7 μm to 14 μm. Is there a way to make it detect below 10μm or to make it detect ...
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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 ...
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PSOC 5 interfacing with PIR sensor
I am trying to interface the PSOC5 LP097 with PIR sensor to trigger the stepper motor for my Pet Feeder System. In addition, everytime the PIR sensor detects a movement, I try to send a mail using ...
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How can a PIR sensor light be made to work with a power bank? [closed]
I am a software engineer by profession but love to tinker around with electronics.
I recently worked on an IOT project for a smart home using a Raspberry Pi and self aware modules consisting of an ...
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Saving a picture to MicroSD while streaming video upon motion detection
I am using an esp32-cam to stream video. As it is steaming I want to take a picture and save it to a micro SD card when motion is detected.
Hardware:
ESP8266-12e,
ESP32-CAM,
EKMC2604112K panasonic ...
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thermistor in HC-SR501 PIR
i know the effects of soldering photo-resistor to HC-SR501 PIR module. It then detects movement in the dark only. But can anyone tell me that what is the effect of adding a thermistor to the same PIR ...
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Always getting HIGH reading from PIR on ESP8266-12e pin D7
I have a PIR EKMC1606112 that I am trying to read using an ESP8266-12e. I have the PIR powered using a 5v regulator so I'm sure it is getting enough voltage. My problem is that when I have the sensor ...
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PIR-Sensor doesn´t generate a signal
I´m playing around with some PIR-Sensors (I don´t know the exact type) and I don´t have any experience in designing circuits for this type of sensor. I have googled some basic circuits and I took a ...
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Night LED Lamp with PIR Sensor - Guide to calculation parameters
I would like to make some LED lamps for night use, therefore at low intensity, just enough to see where you are walking, but almost without waking up. ;-)
It should only turn on when it detects ...
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Understanding analog frontend for PIR sensor
I read this application note from Texas Instruments to learn something about the design of an analog frontend for PIR sensors, but I don´t know the function of the first OpAmp circuit.
What is the ...
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PIR sensor triggering randomly when connected to an esp8266
I've several of PIR sensor modules (HC-SR501) which are designed for a 5v input. However, I need it to run on a 3.3V system only. To achieve this, I removed the diode which is in series with the input ...
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Wiring 2 separate PIR’s to an LED Floodlight
If possible can someone please confirm that this would work?
I want to place a waterproof box on the front of the house, next to this I will put an LED floodlight (without PIR), I then want to put 1 ...
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PIR sensor detects motion only when a very near motion to the IR sensor and when the cover opened
I am tying to implement something using PIR sensor and Arduino UNO. I did the wiring like this
VCC - 5v
GND - GND
Dout - Pin 3
Here is my code
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How can I safely tie the output of a sensor high or low?
I would like to ask a general question and get a discursive answer, but I know that's discouraged here so I'll ask the general question, then pose a more specific one.
In general: What happens if I ...
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Is one of my multimeters wrong?
I have a Panasonic PIR sensor (EKMC1603111) and am measuring the voltage between the output pin and ground pin.
On the green multimeter I read 0v when there is no motion and 3.3v when there is motion ...
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Hacking a PIR Sensor
My end goal here is to launch a camera strapped to outside of the payload of a High Altitude Balloon to take pictures at 5 second intervals during ascent and descent. Trying out a few ideas, I've ...
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PIR sensor (HC-SR501) with n-Mosfet transistor not switching off
I have none to less electronics background, with limited knowledge whatsoever. I've used some schematics from the internet https://www.youtube.com/watch?v=ugDPdgGekNo to put in place the below setup :
...
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How to stop electric fluctuation while using PIR sensor
I used a triac to control the AC current to my led bulb 💡 but once the bulb is in on state, it's flickering.
I made a bridge rectifier and using transistor connected to triac, the input is given ...
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Is it possible to use a PIR detector to switch something on and keep it on without a microprocessor?
When a PIR detector switches something on e.g. a 12V light, I know I could use a microprocessor to keep it on or do anything that I choose to programme.
If I didn't want to use a microprocessor, how ...
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How to trigger a Low-level relay with PIR sensor? [duplicate]
I have a SRD-12VDC-SL-C relay with this configuration: https://www.iotwebplanet.com/product/relay-module/
And I want to trigger it with PIR Motion Sensor Detector Module HC-SR501
https://robu.in/...
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Triggering 12v Relay with HC-SR501 PIR sensor
I have a SRD-12VDC-SL-C relay with this configuration:
https://robu.in/product/1-roadchannel-relay-module-light-coupling-12v/
And I want to trigger it with PIR Motion Sensor Detector Module HC-SR501
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Which N channel mofoset should i use for PIR sensor to turn on LED strip 12v 6A
As i am not a graduate of electronics i have no idea about the transistor that i need to use. Can anyone suggest which N channel MOFOSET should I use to turn on my 12V 6A LED strip. The output given ...
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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 ...
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Supply current of Nanopower OpAmp
I'm using MCP6044 Quad OpAmp (Datasheet) for battery powered PIR sensor, it works fine but draws too much current. When I plug it to 3V source (VDD: 3V, VSS: GND) with no load it draws around 550uA, ...
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What kind of sensor could this be? (Also recommended sensor for detecting the entry of vehicles)
Any idea which sensor this might be? It is being used to detect the presence of a cold and ferrous vehicle, in this case a truck passing by, with minimum speed 1km/h and max speed 5 km/h.
Also would ...
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PIR sensor 3.3V output driving a mosfet loaded with 24V power LED
I'm trying to build a cheap motion activated LED light system.
Circuit is:
24V power --> LED --> LED --> resistor --> (drain) mosfet (source) --> GND
LED are 10V 10W on aluminium heat sink, resistor ...
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How to blink LED using NodeMCU in Arduino IDE?
I have alredy installed ESP8266 package in my Arduino library. I connected d0 pin of NodeMCU to LED's positive terminal and ground pin of nodeMCU to LED's
Negative terminal as well as I uploaded blink ...
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Noisy or malfunctioning PIR HC-SR505 sensor
I bought 5 PIR Sensors to trigger when movement is detected, using an Arduino.
During bench tests, all 5 sensors show many false triggers. I wonder if all 5 sensors have something wrong, or whether ...
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Turn on LED strip via PIR using NPN transistor
I have following circuit. Really simple. But I keep missing why I cant power LED strip (5V 1A). Falstad simulator says overflowing current. I am not very good at simple hardware thing. I often solving ...
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PIR (HC SR-501) not working
I'm working with ESP8266 Wemos D1 Mini and HC SR-501 (PIR sensor) in one particular project (please, see the circuit image in annex). The question is the HC SR-501 stay always LOW. I tried change the ...
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