Circuits & Schematics: meter - 10

91. 3 Meter Clock. Internet connected clock that displays the time using three analog panel meters
    Circuits Arduino Domestic Measurement MCU Open-Source Platforms Microcontrollers Usage
    .. would be able to log on to a SNTP time server, get the correct time, and display the HOURS digit on one analog panel meter, the MINUTES digit on the next, and the SECONDS digit on the last. What a cool way to display the correct time! ...
    May 27, 2008

92. Personal G-Force Meter
    Circuits Automotive Measurement
    .. main application of the accelerometer is either for sensing tilt or sensing acceleration. For this application A G-Force meter for my car will be made to see how many G's I pull while driving. Below is an example of what the Personal ...
    Apr 30, 2008

93. Cheap Sensitive Radiation Detector
    Circuits Security Measurement
    .. sensitivity would be on the order of those survey meters you often see on eBay with scales from 0.5 to 500 r/hour. If the meter ever moves on one of these, you have a problem! They should probably be calibrated in hours left to live! I ...
    Apr 23, 2008
94. Autorange Capacitance Meter
    Circuits Measurement Microcontrollers Usage
    .. I managed to persuade myself to make a really powerful capacitance meter. This is an autoranged version, which means one does not need to adjust the range settings. Furthermore, the ...
    Mar 30, 2008
95. Easter Egg Anemometer (Wind Speed Meter)
    Circuits Wind Energy Measurement
    Easy homemade anemometer, this goes together quickly if you have the parts laying around. This is basically a mini wind generator; the spinning motor produces a current that a multimeter reads. Ingredients: 1 cheap $3 analog multimeter 3 or 4 ...
    Mar 21, 2008
96. Hamster-Powered Night Light With Custom Low-RPM Alternator
    Circuits Wind Energy Supply
    .. way to figure this is to use a voltmeter. Connect one lead of the first coil to one lead of the second coil and set your meter for AC volts (remember to strip the insulation off first). Hold the second coil away from the alternator and ...
    Feb 29, 2008
97. DIY LCD Backlight
    Circuits Light Beginners
    .. case you'll be able to use PWM signal to control brightness of LED. I've used similar technique to modify antique analogue meter for my next project.
    Jan 22, 2008
98. Simple Lie Detector
    Circuits Medicine Security
    .. R2 1 5K Pot R3 1 1.5K 1/4W Resistor C1 1 1uF 16V Electrolytic Capacitor Q1 1 2N3565 NPN Transistor M1 1 0-1 mA Analog Meter MISC 1 Case, Wire, Electrodes (See Nots) Notes The electrodes can be alligator clips (although they can be ...
    Dec 8, 2007
99. 4 Tips to Extend Your Lithium Battery Life
    Circuits Supply
    .. your lithium battery periodically, for laptops this can be especially important. If you start to notice your battery meter is becoming more and more inaccurate, it may be time for some battery calibration. By allowing your lithium ...
    Nov 27, 2007
100. Versatile Digital Speedometer Uses Few Components
     Circuits Measurement Domestic
     .. display of a rotating object's speed in revolutions per minute or show elapsed distances when you use the device as a trip meter.
     Nov 14, 2007

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