Industrial Sensing

I want to build a display panel for community information which will be viewed through a window (library)- it would be great to allow the viewers to have some control - is there existing technologies/ devices that would allow this to happen (interface into a Pi), ideally with nothing on the outside of the window? I'm guessing some sort of proximity or optical sensor buttons on the inside of the glass.

Hello! I use the LSM303DLH sensor to get the electronic compass's heading value, but no matter how I calibrate it, the result isn't accurate enough. The heading value has shifted by 95 degrees. What is the explanation for this? The datasheet is here I found in google if you need the same. If there is anyone who created this chip, seek your guys' advice! Thanks! K  

Many years ago (1970s) I needed to detect fluidised iron sand heated to around 700 degrees C being pumped around a stainless steel system. I had earlier worked in the nuclear area so my solution was to use a Caesium 137 radioactive source in a lead block with a hole creating a beam whch was aimed through the stainless tube. I had a Gieger-Muller tube on the other side and counted the emissions to measure absorption, thereby detecting the presence or absence of ironsand. My question is, what solutions are available now that could achieve the same or better outcome?

Hi there! I am looking for the most reliable method for detecting a small plastic object behind a thin wall (0.8 mm PE) with a detection range on 0-10mm. The plasic part is a small tube Ø3-6 mm with a lenght on 5mm. The sensors we currently are using is a capacitative from RS pro and ifm, but since the parts are made in POM, PE and PP, and due to the nature of the capacitivesensor the accuracy are not 100%. My question to you is, what are your expirience with detecting plastic parts? This case is particular difficult because of the thin wall in PE there is in front of the sensor, this rules out the other more reliable choices as photo- or lasersensor. I am looking forward to hear your experiences. Best regards Mads Voigt

Hello,I am looking for a button that will be placed in a foam pad which will be hit as many times as possible in a minute.Would anyone know any products that are designed for this purpose with a good life time?Thanks for any help,

I have this motor and I need the sensor for it.

Hi! I'm trying to create a system to detect when a basketball passes through a hoop. I've been looking at a range of different sensors but unsure which one would be the best. It seems that Ultrasonic sensors seem quite robust and the industrial type barrels look pretty sturdy, however I'm unsure if it's exactly what I need.  I also need to access this from a computer as I'm trying to create a score mechanic on a PC, so effetively I just need a reliable boolean event signal when a shot occurs. I'm aware that I could wwrite this interface on a Arduino, however I kinda want something fairly battle tested and in a good piece of housing. I'm concious that a basketball hoop will be battered around a bit, so theres that to consider. Anyway, I wanted to know if an Ultrasonic sensor is the way to go, and what else might be available off-the-shelf that can just plug-n-play and give me a USB, or even some sort of wireless zigbee signal when a shot occured. Main things are a reliable signal, and something failry sturdy and robust. Any pointers would be much appreciated! Thanks all

I would like to be able to add the ability to measure cloud height to a local weather station. Since I like on a private airstrip, there are no weather sensors in place to measure this crucial information. What I am looking for is (I think...) an affordable LIDAR sensor with a range of appx. 3000'. Thanks in advance for any ideas!

Good morning all. Hopefully this group can help with this as what I'm looking for is a HUGE request of somebody out there to try and mentor me through what I want to achieve as follows, bearing in mind that I have NEVER EVER built a circuit before.... Throughout the summer months I do displays/talks about reptiles at public events. These animals for the duration of the event are kept in Really Useful Boxes (aka RUBs) and i want to make sure that after experiencing a few very hot days this year that the safety of my animals is enhanced with regard to them not overheating whilst in the RUBS (yes there are air holes etc but some days the general air flow is that low that i don't think that is enough) So I have thought about building some very small circuits that have a thermometer probe that could be put down through one of the air holes in the lids and if the temperature goes above say 30-32.5C then a red LED will come on. There are a few things that it needs to be able to do/have as follows.... - the circuit/battery to fit in a cube say 35mm*50mm in plan and no higher than say 25mm tall (anything much bigger and it will just be too much of a distraction of what the animal is inside). - Have an a switch for on/off operation (in the future I was thinking of gluing a magnet to the underside of the RUB lid next to the air hole and then using that to activate a reed switch to turn on the circuit as well as hold the circuit cube in place....) - once the circuit is on, a green LED will need to be on so we know the circuit is active and that the battery isn't flat (this can either be a static ON light of a flashing light would flashing help with battery life?) - This would need to be powered by something as small as a single CR2032 coin battery or similar. - the thermistor bead probe to be able to be about 75-100mm long so it can dangle down through the lid adequately. - whilst for now if we can somehow hard fix the LED turning red at say 30-32.5C, a future option would be to have some sort of adjustable setting as different animals have different comfortably maximum temperatures they prefer... ... I think that's the list of needs for now I really really do appreciate that finding somebody who can help with not only the design of this board but to coach me through component purchase, the actual build etc it is a MASSIVE request but with the help of the many online circuit design software out there I have found while trying to figure this out, i would like to think that somebody is up for the challenge. I hope to hear from some of you soon. Go safe.

Can the RS Pro 450 Mw light controller sensor stock no 791-8260 be switched between sensing mode and permanently on?g

Extremely simple please. No power supplies, computer inputs & etc, just a detector to light a common or garden type LED. Perhaps using a Yhdc non invasive current detector, [Hall effect torrodial?] or equivalent. Current flow above leakage would be good. Thanking you in anticipation Ian

Hi there. This is my first post on DesignSpark and I am also very new to sensors. I really appreciate any help that someone might be able to offer.  I am working on a uniflow engine project. I need to control the opening and closing of inlet valve with a sensor. I am currently thinking of using reflective sensors. There will be one reflective point on the crank disc and two sensors to detect it. I need a setup which will open the valve when the output signal is produced by the first sensor and keep it open until the second sensor detects the reflective point and produces it's signal. This will allow for control of the openign time of the valve by moving the sensors relative to each other. I imagine some sort of holding relay? I am unsure whether this exists, however? Or where to start with regards to specifications. If anyone has experience with such a setup or might be able to offer some guidance it would be greatly appreciated. Thanks.

We are working on autonoumus vehcle project may I knoiw what kind of camers are used in design of dricerless car for rasperri pi.

Does anyone have any guidance on an inexpensive, accurate sensor, that I can use for limb tracking?  Specifically I want to track leg movement. Thanks!

Measure coin diameter using a U which has emmitting from 1 internal leg IR or photo electric light and on the other leg a reciever a capture of  the IR / Light less the diameter of the coin thus resulting in the calculation of the diameter interuption of the beam of ir or light -- scan width 12mm-42mm