Instructables: question - sensors Thu, 26 Nov 2015 02:42:49 PST BLOX v1.01 need outdoor motion sensor switch with by pass feature for pot lights? gg89 I'm looking for a reliable outdoor dome motion sensor switch with bypass feature for pot lights.  best if I can bypass with flipping the indoor switch and reset by power off for a while, will settle for wireless bypass by a smart phone or last resort: a wireless remote from inside. look forward to ...
By: gg89

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Sun, 1 Nov 2015 23:03:33 PST
Conversion of RS485 data to usb? Batman16 I have a keller pressure sensor PAA-33X which gives output in RS485. I also have an rs485 to usb converter( so that I can get the value directly on my computer for viewing and further processing of that data. I tried the connections but...
By: Batman16

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Fri, 30 Oct 2015 12:47:49 PDT
DIY Small Scale Radar (like Google Soli)? blorgggg Anyone know how to build my own simple small scale radar for detecting ants on trees? e.g. @googleresearch #soli I don't need super sophisticated processing or anything, but just would like a small radar system i can mount next to trees and monitor movements over an area.
By: blorgggg

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Tue, 8 Sep 2015 17:46:48 PDT
I want to interface my pressure sensor which uses RS485 communication protocol to send data to arduino. What can I do? Batman16 I am using a keller pressure sensor( which works on RS485 communication protocol to send the data. I used the following kellerbus code : with my arduino but, am not able to interface it. I am thinking of p...
By: Batman16

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Tue, 1 Sep 2015 03:20:47 PDT
How can you program chip to detect motion using infrared or thermal? EpicNickP I'm making a Smart Pistol MK5 from the videogame Titanfall and I was thinking if I could use camera from gun to special glasses that could detect motion that uses infrared and/or thermal. My problem is how to code a chip to detect motion.
By: EpicNickP

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Thu, 2 Jul 2015 18:42:39 PDT
How can I build an electricity monitoring and control system? jamestyas The service will be to install energy monitoring equipment in a premises which records kW hours electricity usage and also voltage fluctuations. This data will be collected every few seconds, but summarized every few minutes. The recorded data will be transmitted to local data hubs and then over the...
By: jamestyas

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Sun, 10 May 2015 01:36:18 PDT
What sensor should be used, or what can i make to precisely align a vehicle up to a ramp? colie1904 Sorry i couldnt decide how to word my question but here is my situation and i would be gratefull for any input because i am not sure what would be the best or easiest way to go about it.  My car is lowered and therefore i can not park in my driveway without having a ramp(plank of wood) infront of ea...
By: colie1904

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Sat, 11 Apr 2015 03:13:28 PDT
foodsaver robert.creazzo I have a food saver model " 3485 it keeps saying my tray is full  it wont do nothing
By: robert.creazzo

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Thu, 9 Apr 2015 10:32:51 PDT
Sub-mm precision ultrasonic or inductive distance sensor for use with Raspberry Pi? lasercycle Hi there, I am trying to keep my hardware/ coding skills alive and spruce up my bicycle wheel truing stand. I need to figure out the required hardware + software for the following: I want to build a non-contact distance measurement sensor system and get the output "into" my computer for display in...
By: lasercycle

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Mon, 9 Mar 2015 18:41:58 PDT
seeking arduino developer for a small LED / Motion sensor based art project - Los angeles. daksh.sahni.9 Hello  I am a los angeles based artist who is looking for a part time developer who can help design and develop a small circuit which shall include led lights / motion sensors for a small art project.  I do have a small budget for this.  Please contact me at I am looking for ...
By: daksh.sahni.9

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Wed, 4 Mar 2015 19:03:11 PST
Component identification Jaxon0077 A while back a bought a bag from a thrift shop that had all sorts of components in it. I figured for 50 cents it wouldn't be so bad especially because it had a bread board in it. I can figure out what everything is but this....I thought it was a photoresistor so i tried putting it in a circuit like ...
By: Jaxon0077

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Sat, 24 Jan 2015 13:30:41 PST
The different between this two thermistor and where to find their datasheet? tplim Hi Instructables members', Can anyone tell me the different between this two thermistor and it application circuit: 1 - Thermistor_50s (see attached picture) 2 - Ptc_thermistor_500-800r_hmz13-05m650rn (see attached picture) Thank you in advance
By: tplim

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Fri, 28 Nov 2014 17:06:52 PST
I am looking for a sensor that activates after the clicking noise of an automobile turn signal CurtisJ2 Hello Forum, I am looking for a sensor that activates after the clicking noise of an automobile turn signal solenoid stops. Similar to the "clap on clap off" device, but activates only after I choose to stop clapping.  Or like a heart monitoring circuit that activates an alarm when a heartbeat st...
By: CurtisJ2

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Tue, 11 Nov 2014 16:47:50 PST
Using a PIR to turn on a sound module lonesoulsurfer Hi All, I have used PIR sensors before but i usually hack one from a cupboard light you can buy.  What I want to do is use a really small (and cheap) board like the trinket (adafruit) and hook it up to the PIR in order to turn on a sound module.   Does anyone know what board would be best to do thi...
By: lonesoulsurfer

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Wed, 2 Apr 2014 18:00:05 PDT
How to increase the light sensitivity of a DARK SENSOR CIRCUIT? Arijit Chatterjee I recently managed to replicate a dark sensor circuit using a LDR, a 220K & 330 ohms resistor, a BC547 transistor and a LED. But the problem is that it is very little sensitive to light. During daytime there is no problem but at night, under the CFL light it doesn't sense the light and turns on. To ...
By: Arijit Chatterjee

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Wed, 26 Mar 2014 07:43:26 PDT
How does one make a reverse photocell? EEWolverine How can you use a photocell to make a circuit whose resistance is proportional to incident light? I'm looking for an open circuit in the dark and a short circuit in lighted conditions.
By: EEWolverine

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Tue, 7 Jan 2014 22:50:46 PST
pinout help for my salvaged ir sensor/photo diode from mouse.? Atul009 i have salvaged ir emitter sensor pair from an old optical mouse. ir led glows fine on testing with mutimeter but the sensor part has 3 legs and i have always worked with 2 leged photodiodes . what is this specifically called? how can i know its pinout by testing with multimeter?
By: Atul009

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Tue, 24 Dec 2013 11:12:33 PST
I need help in Proteus program !! CSE251 Hi everyone .. I'm made  "Automatic Plant Watering " circuit in Proteus, but I can't find the probes, so can I place it with switch !! another thing is where I should connect the water pump? thank you ..
By: CSE251

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Fri, 6 Dec 2013 05:49:10 PST
how to use quad photodiode from a dvd burner as normal photodiode? Atul009
By: Atul009

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Sun, 27 Oct 2013 22:20:17 PDT
how xbee serial work? adiga123 hello i read ultrasonic sensor serial connected to arduino but when i connect xbee between sensor and arduino and i configur my and dl matching and same id what i need to config else i work on 3,3v what i need to do to make it same as i read direct from sonar . this is my code reading from sonar an...
By: adiga123

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Sat, 21 Sep 2013 06:45:41 PDT
How to attach a flat weight sensor to a voice recorder? What kind of sensor to use and where to buy items? mrobyn22 I'm making a prototype the size of a door mat that when stepped on plays a voice recording. What kind of sensor would I use and how could I make it activate a voice recording (it needs to be flat)? Where might I buy the needed items? The sensor would need to be activated after 1lb of pressure was ap...
By: mrobyn22

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Wed, 5 Jun 2013 09:35:52 PDT
how transistor base touch sensor works???????? Atul009 I was playing with a transistor and noted that when i touch the base light glows (How is skin giving it electric current??) i googled on this topic hardly found 1 link but there was only a diagram I have also worked with fingure touch techniques but this is a bit different it maybe capacitive
By: Atul009

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Sat, 25 May 2013 07:49:59 PDT
Suggestions for a sensitive, hall effect sensor to be used with an arduino? konjurer I'd like to find the an inexpensive, highly sensitive hall effect sensor.  One that could possible sense a strong magnet from several inches away or within someone's hand if they were holding a strong magnet in their closed fist. I am looking for a non-latching sensor that would trigger when a magn...
By: konjurer

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Fri, 26 Apr 2013 14:51:36 PDT
How to set the gas sensor so its already have a value in ppm which read by microcontroller? ftreska How to set the gas sensor so its already have a value in ppm which read by microcontroller? so i dont need to convert the Vrl output from gas sensor into  value of gas in ppm on microcontroller.
By: ftreska

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Wed, 3 Apr 2013 23:17:48 PDT
Is it possible if i connect a gas sensor MQ-136 to microcontroller directly? ftreska i want to detect sulfur dioxide (SO2) uses sensor MQ-136. Is it possible if i connect the sensor to microcontroller directly? or i need to add a circuit between it? if yes, what kind of circuit ? And anyone knows what is output of gas sensor MQ-136? whether it is analog or not yet? Thanks folks!
By: ftreska

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Wed, 3 Apr 2013 06:04:31 PDT
hi..u know how to improve go-cart using motion sensor? palabuto im electronic student and i need to finish my project about to improve go-cart using electronic system so i want to built a car that can detect out current place in race by display it using 7 segment..its using motion sensor to detect other car that tress passing us..can anyone help me?
By: palabuto

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Tue, 5 Mar 2013 04:45:36 PST
Help me create a motion sensing AC outlet trigger? fabes253 Hello, I would love to create some kind of motion sensing device that I could plug into a wall socket and then plug a AC 120V device into it that would be activated by the motion sensor being tripped. The goal is to build something simpler and more cost effective than the infamous Blender Defender...
By: fabes253

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Thu, 21 Feb 2013 15:02:13 PST
how do you get pass school blocks without proxyies? 381530 my school has a proxy bolck on all major media social network and i am trying to get pass it so that i can acess facebook, twitter, my space ect and i can't because we can't download things exspecially proxies or we will get supended
By: 381530

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Sun, 3 Feb 2013 12:27:53 PST
How can I make a motion activated motor that can pull a cable and pull up a 4lb object ? nagualar How can I make a motion activated motor that can pull a cable and pull up a 4lb object  ?  I am wanting to make a toy for my cat. I want the sensor to keep the object up for extended time. Who can help me.
By: nagualar

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Fri, 21 Dec 2012 18:57:26 PST
Weight sensor to act as a button? DoctorWoo I had the idea for a prank I would love to try at some point, but I'm having some issues with the basic idea... What I need is a way to hook up either a sensor or button to a scale. What I want to have done is when someone steps on the scale, and exceeds a certain weight (say 50 pounds, just to make...
By: DoctorWoo

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Mon, 22 Oct 2012 09:34:19 PDT
Help with simple transistor circuit.? Hafiz Mohammad Shayan Tariq I want the LED to turn on when it's dark. But  it remains on and taking out the LDR doesn't affect it. I couldn't post a picture but i made a replica in Fritzing EDIT: The transistor is 3904 NPN.
By: Hafiz Mohammad Shayan Tariq

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Sat, 20 Oct 2012 09:22:59 PDT
Can i use a IR sensor for reducing automobile speed? sainath018 IR sensor which should recive  reflected signal and send information to battery to pass electricity
By: sainath018

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Wed, 19 Sep 2012 18:42:40 PDT
accident prevention krutika agare i am selecting my final year project which is an eye blink detector and accident prevention in that i want to use IR moudule(transmitter and receiver) but i have doubt that can IR light penetrate through human eyes if is so it may harmful so is there another option instead of IR led light?
By: krutika agare

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Mon, 10 Sep 2012 07:08:25 PDT
Help with photodiode? allsparkunleashed hii i am working on a circuit where i want to use photo diode as a switch.. that is when infra red radiation falls on the photo diode, it will allow the current to flow through the remaining circuit. but when i did the circuit, there was a small problem. even if ir led is not used, small current is ...
By: allsparkunleashed

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Sun, 26 Aug 2012 05:51:22 PDT
How do you make a home made FLIR blocker? wolfofthewhitemt I wanted to make a FLIR blocker to wear on my clothing and was just wondering how to do it?
By: wolfofthewhitemt

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Sun, 19 Aug 2012 16:34:23 PDT
How do you use a piezoelectric ceramic to light an LED? vcaballero I have a small, round  piezoelectric ceramic sensor made from PZT (Lead Zirconate Titanate) material that I would like to try out to see how much mechanical force I need to apply to light a 5mm LED. The piezo ceramic has already been soldered with two wires (negative and positive). Nevertheless, I a...
By: vcaballero

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Mon, 13 Aug 2012 14:11:48 PDT
Is this a good pcb design practically speaking? Shariq92 I designed this PCB in Diptrace and now i am going to etch it at home. This is my first PCB design. Can someone please tell me if this is a good and practical design? This is a design of a water level indicator based on a single NOT gate IC (HEF 4049). UPDATE: I redid the layout. Increased the tra...
By: Shariq92

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Fri, 10 Aug 2012 11:49:53 PDT
Any one can tell me what is this thing in diagram? njrajgelani I was making leaser alarm system with this diagram but i don't know what this marked thing shows If any one can help me i will be thanked to you. Please answer fast.
By: njrajgelani

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Fri, 6 Jul 2012 05:19:05 PDT
Is there a simple way to test the air flow/pressure inside my HVAC fan housing? gereckes Is there a simple way to test the air flow/pressure inside my HVAC fan housing? Perhaps some kinda guage I can attach to the blower unit of my fan box for the HVAC? Why? I'd like to test with new filter and then old, to determine when it needs changing. so, I'm looking for a simple, cheep differen...
By: gereckes

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Thu, 5 Jul 2012 08:12:32 PDT
help me to identify sensor written 5D2A 3242 ? zohaib443 this is the sensor on a auto coner spinning machine drum shaft 12vdc.
By: zohaib443

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Mon, 11 Jun 2012 08:27:00 PDT
How do I make a proximity sensor that is specific to something small/light (I will hang it from a cat's collar)? Taiji Pretty much what the title says.  Trying to get a proximity sensor for when one cat walks up, but not the other (thought to hang a target on one cat's collar).  That way a device can run when one cat comes close, but not the other.
By: Taiji

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Fri, 1 Jun 2012 06:55:44 PDT
Looking for someone in NYC who is savvy with electronics & physical construction for a window display project MelindaHelp Help Remedies has envisioned three window displays at a prominent beauty and health chain retailer in NYC. We're looking for someone to realize the ideas into physical window installations including sourcing the materials, building the various components, and installing the elements. The three diff...
By: MelindaHelp

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Thu, 10 May 2012 17:13:48 PDT
temp controller peter354 hi dont know is anybody can help replacing the batteris in my drill pack and found that it has what looks like a thermistior??? to control chaging temp.  unfortunatly when dismantling I shorted it out to + and i believe blew it. i need to renew it as it lookslike it feeds relay in charger to switch...
By: peter354

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Tue, 8 May 2012 06:31:53 PDT
Building probe/sensor for TI Nspire CX CAS? huck alexander My TI Nspire CX CAS just arrived in the mail today!  It's an upgrade from a TI84, and my reliable old TI82.  Just a quick search yields a lot of information on how this calculator can be used as much more than a graphing calc. There is software available for scientific use, which incorporates speci...
By: huck alexander

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Thu, 3 May 2012 16:00:54 PDT
if one of the supply wires to a hall sensor is seperated , Will it imitate the symptoms of a damaged Hall sensor? doogg1 Power supply wires to my hub motor damaged due to spinning,  motor does'nt start from standstill. when it starts it works in a stuttering manner.  When allowed to run without load it runs without hesitation.  I read that this is one of the systoms of a failed hall sensor Doogg1
By: doogg1

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Sat, 14 Apr 2012 18:45:05 PDT
1)Meaning of 'Star' tag on the project? nachiketa 1) What is meaning of 'Star ' symbol on project, who gives this, what is the criteria, Is there Reward ? 2) What do you mean by 'Editors pick', 'Popular', 'Rating', 'Views', Zeitgeist',      Who selects it, what is the criteria 3) If some one copies idea and take patent on that idea, Does the Author...
By: nachiketa

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Sat, 31 Mar 2012 08:01:57 PDT
I want to adapt a 1341 solar engine to switch a 5v relay carloc SE output voltage switching motor at the moment is 2.4v .. how do i get it to 5v to switch a 5v relay ? - the aim is to use SE to trigger a relay that will supply voltage to an automatic car antenna motor that draws .7amps 7vdc, . The supply voltage for the antenna motor will be another separate sup...
By: carloc

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Thu, 29 Mar 2012 07:12:50 PDT
What is the meaning of tag ? nachiketa What is the meaning of 1) step by step 2) photos 3) Feature
By: nachiketa

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Tue, 27 Mar 2012 21:26:11 PDT
Use my webcam to adjust screen brightness automatically for my windows computer. tbrooks1 I have done a few google searches as well as some searching through instructables and have not found anything concrete about the application. There are apps that dim based on time of day (like Flux) but here in Florida, especially in the rainy season, it can get dark really quickly. There are a few ...
By: tbrooks1

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Thu, 22 Mar 2012 09:44:29 PDT
IR Reflective Sensors for Arduino?? hydronics I just ordered a bunch of reflective sensors... Similar to the sparkfun one (I've not decided digital or analog yet)...I'd like to connect them all up similar to the Pololu Arrays...  I want to hook up like ~30 and read them individually... How do you differentiate so many inputs into the Arduino? ...
By: hydronics

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Fri, 16 Mar 2012 12:29:21 PDT