I have a hall effect sensor which outputs 0V when on the North pole of a magnet, 5V when on the South pole. It idles at 2.5V. I want to connect 2 LEDs to show the reading, one act …

Are there any low-cost (<50$USD) wireless ambient temperature sensors available? I would like a simple to interface to the sensor i.e. IP over Wifi if at all possible.

I'm looking into building a temperature monitoring system, and I want the sensor to have the ability to be submersed into boiling water. Can a thermocouple handle this? I'm looki …

I've had a number of issues getting good stable analog readings from an RTD temperature sensor. Typically the sensor/circuit/software works fine at my desk then when it is installe …

I'm thinking about putting together something simple for my young son's soccer team. I'd like to build a simple circuit that could be placed on/underneath the laces of their shoes …

I'm looking for a very low cost barometric pressure sensor. The SCP1000-D01 available at Sparkfun and elsewhere is around $25 but I was hoping to find something in the $5-10 range. …

What software do you suggest for visualizing sensor data on OSX. For example bunch of sensors connected to Arduino and sent to MacBook via serial. Realtime graphing preferred but w …

Is there a way that I can make an Arduino or other Micro-controller detect a change in capacitance. I'm thinking of having a screen on my door that only turns on when you touch the …

I found a sensor recently that emits ±90V (AC) on stimulus. How would I go about reading this from an arduino? Update I didn't think there were so many options. :) The kind of …

I'm currently an undergraduate student in a design/engineering focussed fine art program. I do projects along the lines of what you might find at the MIT Media Lab. Recently I've b …

I've recently built some fiber-optic bend sensors and I want to read the values I get from them into a computer via an Arduino. I'm measuring the light with this photodiode from In …

I'm trying to make an onboard system for my bike using an Arduino or maybe the Lilypad boards....I'm want to output my speed to an LCD display and am wondering the best way to go a …

The answer to this question is probably staring me in the face, but I just can't see it. I'm attempting to interface with an LM335AZ temperature sensor (datasheet) at 3.3V. The d …

How can I sense the touch of a hand through a thick surface? I'm working on a device that has to be completely enclosed in a 1-2" thick wooden casing (or 1-3mm thick metal) due to …

I am planning on an automation project that will be using several different sensors including but not limited to: Temperature, Barometric Pressure, Air flow, Humidity, etc. As I …