Circuits & Schematics: meter - 9

81. 30 W Digital Wattmeter for RF (0-500 MHz)
    Circuits Measurement Radio AD8307
    .. project will explain how I build my new wattmeter. This watt meter will be able to measure power from 300 nW to 30 W @ (0-500 MHz). This wattmeter is based up on a dummy load of ...
    Jun 15, 2009

82. XXI Century Sundial - Now for Arduino also
    Circuits Domestic Laser MCU Open-Source Platforms Microcontrollers Usage Arduino
    .. software can be modified to display different things like a voltage at an analog input of the micro making a LASER analog meter. Or to make something like a LASER chronulator. More of these circuits can be superimposed to display different ...
    Jun 10, 2009

83. How to Charge Any USB Device by Riding Your Bike
    Circuits Supply Domestic
    .. motor will suffice.) We attached this motor close to the rear brake mounts directly on the bike frame using a piece of a meter stick between the motor and frame to act as a spacer, then tightened 2 hose-clamps around it. Wiring For the ...
    May 25, 2009
84. Digital Capacitance Meter
    Circuits Measurement Microcontrollers Usage
    .. is a simple capacitance meter which can measure capacitance value easy. There are some measurement methods for capacitance, at one time the ...
    May 25, 2009
85. Ghetto Development Environment
    Circuits Microcontrollers Usage
    .. dining table, and cleans up in like 2 min when friends come over. (It's the alarm-time-setting part of what's going to be a meter-clock.) I bring the setup to work sometimes when I feel like playing hooky. Add a small bag of goodies (some ...
    Mar 28, 2009
86. The Orton Moon Clock
    Circuits Measurement Domestic
    .. 'Freq' preset in the simple timebase should be adjusted until this is the case (if you are lucky enough to own a frequency meter, then adjust for a frequency of 554.83 Hz). Once set, the second hand can be removed again, and the clock ...
    Feb 12, 2009
87. DIY electrometer
    Circuits Measurement
    .. should be in darkness, though the circuit seems to work okay with the neon bulb illuminated. The only effect is that the meter ‘autozero’ has a much shorter time constant when the neon bulb is illuminated. The meter can be of ...
    Feb 2, 2009
88. A Simple Digital Thermometer
    Circuits Measurement Microcontrollers Usage
    .. is truly a simple digital thermo meter, a beginner’s project, but having sufficient accuracy. The brain of this circuit is PIC16F877A ; a ...
    Nov 20, 2008
89. The Curious C-Beeper
    Circuits Measurement
    .. C-Beeper will become indispensable in virtually no time! Quickly match capacitors and trimmers. Forget the capacitance meter when matching parts from the parts bin or selecting a fixed value to replace a trimmer - the fingers as ...
    Nov 12, 2008
90. LM3915 / LM3916 VU Meter
    Circuits Audio Light National Semiconductor LM3914 LM3915 LM3916
    .. The LED VU Meter was the height of late 80-s boombox technology. This instructable will build one out on the breadboard. Who ...
    Sep 1, 2008

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