Circuits & Schematics: frequency meter - 5

41. LED VU Meter
    Circuits Audio
    .. with LED level bar graph that you find on most stereo systems or amplifiers. This is your chance to build your own LED VU meter that you can link to your amp and watch it in action. The application is based on LM3915 chip. This is a ...
    30-10-2007

42. 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 ...
    21-03-2008

43. 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 ...
    30-03-2008
44. 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 ...
    30-04-2008
45. 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 ...
    01-09-2008
46. 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! ...
    27-05-2008
47. 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 ...
    25-05-2009
48. 0-500MHZ LM3914 RF Power Meter
    Circuits Measurement Radio
    .. up to 500MHZ. However instead of using a PIC and LCD, I am using a simple LM3914 Bar Graph IC for display of db levels. Meter may be powered from a 9V battery or external 12V DC adapter. A built-in 78L05 regulator is used to power ...
    23-02-2010
49. Volt/Amp/Watt meter on MSP430 LaunchPad
    Circuits Measurement Microcontrollers Usage Texas Instruments MSP-EXP430G2
    .. is a simple voltage and current meter that uses the Texas Instruments INA219 chip and Texas Instruments MSP430 LaunchPad Development kit . Voltage ...
    21-08-2012
50. Photo meter assesses ambient light
    Circuits Measurement
    .. will produce usable results at a low cost. Figure 1. If the simplest version is required, use an inexpensive volume-unit meter to replace the 0- to 100-uA meter. Three LEDs are used; experimentation will indicate which device has the ...
    16-04-2013

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