I'm looking for some advice on which components to use for this application. The problem: We'd like to measure the amount of "noise" in a warehouse and display this on a LCD/moni …

I am trying to minimize interference in a sensor project. Can anyone recommend a good shielded wire I can solder into my board?

I want to build a BlinkM as a simple temperature indicator as seen at http://thingm.com/products/blinkm/project-gallery.html Anyone know where I can get a schematic & parts lis …

Knowing that Bluetooth and ANT+ use FH-SS and ZigBee uses DS-SS, I would like to learn of the modulation technique's effects on a wireless point-to-point connection if I am impleme …

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 have taken apart a digital weight scale and on the circuit are two pins labelled 'test'. When connecting this to the soundcard of my PC I can see it is a digital signal (high/low …

I have a color sensor from the original lego mindstorms set. I have had a hard time finding any reliable specs on the thing, but I did find somebody who has reverse engineered it q …

How do i measure the level of a water tank with a microcontroller?

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.

Hi, For growing crystals it is important that there are no vibrations. Is there a cheap and easy way to measure vibrations in the floor, like people walking, doors closing etc.? …

What shielding techniques would be best suited for a digital sensor (3 wires - Pwr, Gnd, Sig) in a noisy environment (specifically fluorescent lighting)? Twisted pair (trio in thi …

I have a TI INA126 (datasheet) instrumentation amplifier that I want to use to amplify a noisy, low-level signal from a fabric-based resistive stretch sensor. The resistance range …

I am hoping someone here can help me. I am having trouble with a RFID kit I bought from SparkFun. I purchased the USB RFID (SEN-08852) with the RFID Reader ID-12 (SEN-08419) and s …

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 …

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 …