Sensors convert a physical quantity (e.g. temperature, pressure) into an electrical signal.
0
votes
0answers
40 views
Any thoughts about metal ore detection?
I am doing a project which involves a way to detect metal. The problem is
it must be able to detect any metal( iron, copper, or
aluminum, any metal). Does anybody have
any suggestion about that?
1
vote
3answers
79 views
Photo eye hysteresis
I am looking for some help here. I have a photo eye that controls a 120vac pilot relay which acts as an interposing relay to drive several high voltage lighting contactors throughout a plant. Problem ...
-1
votes
0answers
40 views
sensors/actuators connected to USB
I need to buy or create device that can be connected to PC via USB port and have the following outputs/inputs:
several temperature sensors (possibly something like DS1620 or DS18S20),
several analog ...
1
vote
1answer
54 views
Arduino, GSM quadband module and gas sensor connection anyone?
I have an Arduino, a GSM quadband module and a gas sensor.
I could only find connections of GSM to Arduino and gas sensor to Arduino. Anyone who can give me a connection diagram of three devices?
0
votes
2answers
37 views
interfacing MMA7361L with PIC ADC
I'm trying to interface an mma7361L accelerometer (on breakout board with caps) to the analog inputs of an 18f46k20. According to the PIC datasheet, the Vmax input voltage is Vdd + 0.3 which means I ...
1
vote
0answers
42 views
Pressure/barometric sensor for coke can stirling engine
I'm working with a friend to provide instrumentation for a coke-can Stirling engine he's building (the kind you can see on Youtube).
As part of this, we'd like to measure revolutions per second of ...
2
votes
2answers
56 views
light system for stairs
I have a stair made of several steps. I want that when I put a foot on a step, the light of the next step is turned on. Each light is placed just under the edge of the step. If I use LEDs as lights, ...
0
votes
1answer
44 views
Low Voltage Photosensor
I'm looking for a photosensor/photo IC part (combination of photodiode, linear amplifier, Schmitt trigger and output transistor) that can be powered with 3.3V. Fairchild QSE256/257/258/259 is almost ...
2
votes
1answer
46 views
Xbee traffic/bandwidth limitations for a real-time-ish application
I am planning on making a wireless sensor network with 4 Xbees going to 1 Coordinator. I want each of the sensor nodes to transmit continuously at ~5Hz.
Is this feasible with Xbees? What sort of ...
1
vote
3answers
136 views
Measure weights with arduino
I want to measure weights with arduino. After the measurements, i want to analyze the weight data of the measured objects.Precision is not very important, but it should be work in the range of 10 to ...
0
votes
1answer
64 views
pH sensor with DS18B20 temp compensation on PIC
I am trying to build a circuit that interfaces a standard pH electrode to a PIC (18F4550). I need the PIC to also use a DS18B20 for temp reading and use that data to correct the pH reading. I ...
4
votes
1answer
63 views
Read analog envelope by 8051
I am having a serious issue here. I've bought a Maxbotix XL ultrasonic sensor but I didn't know that it is the AE version, that does not come with pulse width, it comes with Analog Envelope. I have a ...
9
votes
4answers
131 views
Methods to accurately move an object across a 2-D plane
This is the opposite/complement of my previous question, which concerned measuring the precise position of an object as it is moved/drawn by someone over a short duration. Assuming I use one of ...
8
votes
6answers
174 views
Ideas to measure 2D position of an object constrained to X-Y plane
I am working on a project, and an aspect has come up where I would like to measure (track continuously) the X and Y position of an object across a 2D plane. The object is moved by a person, with the ...
1
vote
3answers
72 views
Hall-effect switch or photointerrupter
I'm dealing with a small automation project, a rack and pinion system controlled by an Arduino card with two limit switches to ensure that the rack moves within the boundaries.
I have been trying both ...
