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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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How to introduce a PIR motion sensor and/or timer into my circuit?

I created a product demo box that completes a circuit once the "push to start" button is pressed. Closing the circuit allows the customer to see my product in action while holding down a ...
Charles's user avatar
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PIR sensor and the fault detection related to it

Well I am Working on a PIR occupancy sensor project and the issue is, it is having false detection on occasions like when an air conditioner or a fan is turned on, well I can't figure what to do?
Aakas Pulikkal's user avatar
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PIR Sensor Interference When RF Transmitting

I have created a small DIY circuit which sends a signal over 433.92Mhz when a PIR sensor is triggered. The circuit consists of 4 modules soldered onto stripboard. Schematic: Components are: 0.71mm ...
Jonas's user avatar
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HC-SR501 PIR sensor with 3.6V LED strip

I need your help with my HC-SR501. I'm not really deep into all the electronical device stuff, only got some basic knowlegde. I did some research here but didn't find a solution to my problem. I have ...
Patrick's user avatar
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Is this behavior for a Murata PIR motion sensor test circuit expected?

I am using a Murata IRA-S500ST01A01 PIR motion sensor. This is the datasheet. Based on a description of the pyro-electric effect from part 2 of these application notes for the IRA S210 (same family of ...
cornelius's user avatar
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Explanation of the circuit diagram of a PIR sensor activated light

Can someone please explain the operation of this circuit diagram of a PIR sensor led light. The high voltage "ground" connections in the original diagram have been replaced with connections ...
Francis Lapaba's user avatar
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74 views

Does this electronics flow chart work as a system?

I've tried to create a flow diagram of some electronics I'm trying to do for a project at home which is a motion activated light up frame (added a photo of the lights in the frame but this isn't the ...
SMH's user avatar
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2 votes
1 answer
316 views

PIR sensor circuit

I am designing a PIR sensor circuit to detect human movement. I am supposed to display movement using an oscilloscope (the response from this PIR sensor.) I have used the following circuit but it does ...
user355274's user avatar
1 vote
1 answer
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How many types of pyroelectric sensor exist? [closed]

I'm developing a PIR sensor, I'm new in this (PIR sensors) and saw that there are sensors that have two elements while some have four elements. Are there more types? What's the difference? Is there ...
E_Blue's user avatar
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1 answer
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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 ...
SamSpade's user avatar
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146 views

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 ...
sorin's user avatar
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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 ...
Martiinii's user avatar
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225 views

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 ...
Marc's user avatar
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148 views

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'...
motion channel's user avatar
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177 views

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-...
snewpers's user avatar
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1 answer
303 views

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 ...
Vid's user avatar
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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 ...
K4ever's user avatar
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3 votes
0 answers
125 views

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 ...
cwhitehouse's user avatar
0 votes
2 answers
157 views

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 ...
7E10FC9A's user avatar
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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 ...
Ramki's user avatar
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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 ...
James Geddes's user avatar
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1 answer
154 views

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 ...
Vasant Joseph's user avatar
10 votes
6 answers
2k views

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 ...
questioner's user avatar
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1 answer
345 views

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 ...
Aslam's user avatar
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1 vote
1 answer
244 views

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 ...
user1114881's user avatar
0 votes
1 answer
418 views

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 ...
user1114881's user avatar
0 votes
5 answers
173 views

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 ...
Kampi's user avatar
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1 answer
511 views

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 ...
Overlights's user avatar
3 votes
3 answers
633 views

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 ...
Kampi's user avatar
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226 views

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 ...
jancoow's user avatar
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1 answer
169 views

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 ...
Sandeep Thomas's user avatar
0 votes
0 answers
75 views

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 ...
hazymat's user avatar
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0 answers
125 views

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 ...
vicatcu's user avatar
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0 answers
140 views

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 ...
Sijith's user avatar
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1 answer
113 views

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 ...
Steve's user avatar
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1 vote
1 answer
2k views

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/...
Mohak Shukla's user avatar
1 vote
0 answers
2k views

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 ...
Mohak Shukla's user avatar
0 votes
1 answer
41 views

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 ...
Naveen A Dsouza's user avatar
1 vote
0 answers
95 views

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, ...
Arksu's user avatar
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0 votes
1 answer
222 views

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 ...
Niels's user avatar
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1 vote
0 answers
49 views

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 ...
azr123's user avatar
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3 votes
1 answer
2k views

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 ...
SamuraiJack's user avatar
1 vote
1 answer
340 views

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 ...
Aween Rozmi's user avatar
1 vote
0 answers
109 views

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 ...
Sharifdeen Ashshak's user avatar
1 vote
1 answer
385 views

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 ...
Jeff's user avatar
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0 votes
1 answer
344 views

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 ...
guyd's user avatar
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1 answer
223 views

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 ...
user1085907's user avatar
1 vote
1 answer
459 views

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 ...
Gogutz's user avatar
  • 111
1 vote
1 answer
71 views

PIR Sensor for bulb in room

This has been very long since I left electronics but recently I restarted taking interest in it as hobby. I bought some PIR sensors from Aliexpress and found it is very simple to implement if I have ...
Silkograph's user avatar
0 votes
2 answers
121 views

How do I model a digital out in a circuit simulation?

I have a PIR: Panasonic NaPiOn AMN34112 that has a digital output. When it detects motion it outputs 4V and 100 uA max. I want to connect this output to a LED using one or more transistor amplifier ...
Andy's user avatar
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