Questions tagged [smoke-sensor]
The smoke-sensor tag has no summary.
26 questions
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How do I connect pins if we don't use certain pins in TPS8802DCPR
I was using TPS8802DCPR in one my designs. I was wondering how do I connect VBST and VLX pins if the boost converter is not used. In data sheet's pin description, it says "Boost converter ...
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Trying to power a MC145010 smoke detector without a battery
I'm trying to make a cheap MC145010 based smoke detector "smart" by adding an ESP8266.
Since the ESP8266 needs plenty of power, I have 5V around. I'd ditch the 9V battery that powers it.
I'm ...
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Sensor that can detect the amount of smoke [closed]
Hello I'm an EE intern in a factory my given task is to desing a circuit where I can measure the difference in the amount of smoke between the filter inlet and outlet. I need a sensor to make it. I ...
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What is the typical current draw of a battery powered smoke detector? [closed]
Often the battery operated smoke detectors take 9V batteries.
I want to replace batteries less often. Question Why do smoke detectors run off 9v batteries? doesn't offer a clue.
Should I look for ...
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Smoke detector beeps even battery voltage seems good [closed]
One of the smoke detectors started beeping the other night. So I replaced its battery and it stopped beeping. Out of curiosity, I measured the voltage of the old battery. It surprised me with a 9....
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How to fix voltage divider that drops more voltage than expected? [closed]
I'm not sure if I stated the question correctly, but here are some details.
I want to hack Ikea smoke sensor that has a controller designated as CS2105GO-S12 (also known as MC145010). It has aa T4 ...
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Looking for a device to detect the amount of smoke [closed]
I'm building a cold smoker monitoring system. With cold smoking you need to maintain consistent levels of smoke and not necessarily a consistent temperature like with hot smoking. I'm trying to find a ...
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2 wire smoke sensor detection circuit
I have a System Sensor B401 model smoke sensor.
I want to connect it in 2 wire mode. I want to connect multiple of this smoke sensor in daisy chain fashion with EOL resistor. I read on the internet ...
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Use of relay in a gas sensor (safety issue)
I have developed an MQ-5 based LPG gas sensor which uses a relay.
Is the relay itself a fire hazard (while switching) if gas is in the vicinity ? Thanks.
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Mq4 sensor doesnt detect natural gas but detects cigarette lighter gas only! [closed]
I am working on a project for detecting natural gas of cooking stoves, I have tested several sensors but the mq4 sensor was the one that worked fine.
Now after about one month of using the sensor i ...
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Is smoke sensor safe for eyes / kids? [closed]
So I was researching stuff about smoke sensors and I may be paranoid but I was wondering if they were Safe for kids and in general , I read they had infrared LEDS which I heard were very harmful for ...
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Simple circuit slowly powering down
I have a gas sensor module here, with a power led and a digital out led (which glows in case of successful gas detection) built in it....
A simple circuit here, just connected the vcc and ground of ...
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Why are ionization smoke detectors bad at detecting smoldering fires?
I have been doing some research on the differences between ionization and photoelectric smoke detectors, and main differences in their capabilities, seems to be their ability to detect different kinds ...
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Optical Smoke Detector design with Arduino: buzzer problem
I'm working on an Optical Smoke Detector using Arduino UNO board. Here is the circuit diagram:
Whenever smoke is detected by the smoke sensor, the buzzer and LED should work. From the Arduino ...
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Why does this CO detector forbid the use of lithium batteries?
I have several Kidde KN-COB-LP2 CO detectors installed in my house. They look like this:
They operate on standard AA-size alkaline batteries, and typically last several years on such batteries.
The ...
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smoke detector for that "burning electronics" smell?
We all know that characteristic odor of fried electronics... when you "let the magic smoke" out of the chip.
Unfortunately it doesn't seem to set of ordinary smoke detectors, at least not at ...
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Datasheet for XC370696P (Smoke Detector IC)
I decided on a whim to take apart an old smoke detector that desperately needed replacing, and after some ripping, I got to the guts of the thing.
Neat stuff.
Clearly the brains of the detector is ...
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determining sensitivity of carbon monoxide sensor
i'm working with a alphasense CO-AF sensor & i need to find out the CO quantity in ppm . i referred to the data sheet of the device and i dont know how to convert the given sensitivity
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Smoke detectors replacing - why? Lifetime of components?
I often see that smoke detectors "should be replaced" every 5, 10 or 20 years. Like on this website for example: http://modernsurvivalblog.com/health/did-you-know-smoke-detectors-expire/
The U.S. ...
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how can i using CPU8085 and PIO8155 crate an alarm circuit and program [closed]
example ; we have smoke sensor, speaker and my circuit.When Sensor has been active, speaker to sing it. i'm newbie in this topic. how can i do it like this circuit ?
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Phototelectric smoke sensor with microcontroller
I am trying to connect a photoelectric smoke sensor with Atmega328. The smoke sensor IC has pin 7 as the I/O pin which gives a 9V when smoke is detected. I have connected this pin to the input pin of ...
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smoke fire alarm circuit and relay SPDT
I want to put relay SPDT in the output of the below circuit to connect with circuit working in 12v.
when the buzzer run the relay switch on or off to another circuit automatically
I want to run it ...
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How to use MQ-2 module?
I am totally new to hardware.
Recently I bought this MQ-2 module, but I couldn't figure how to get it to work, the on the ship worked but where is the output? I mean the place where I place the ...
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Shifting voltage level for reading sensor output on microprocessor
I realized a prototype-board with an old ATmega8 and a particle dust sensor. Both supplied with the 5V. The sensor output voltage is normally high (>4V), and falls below 0.7V if the sensor detect the ...
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Why do smoke detectors go off when lightning strikes?
Just experienced this, I saw lightning outside my window (not hitting our building or anywhere close to it), and immediately after the smoke detector went off for a short while. Can anyone explain ...
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Looking for an inexpensive Smoke Detection Sensor
As the title says, I am looking for a smoke detection sensor. Took a look from SparkFun to Mouser and did not find anything. Is there a part you would recommend? I would prefer something that ...
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