Circuits & Schematics: frequency meter
Search for: "frequency meter"
- .. article shows how to build a small, cheap and simple frequency meter, without any fancy, out of reach components. The simple proposed design can measure frequencies ...29-06-2010
- .. by 28-pin device PIC16F876. The later is capable of driving 4 digit LED display in multiplexed mode while measuring frequency, power supply voltage as well as handle two analog inputs to display SWR/PWR signal strength in a ...
.. is a successor of the PIC16C71 4-digit LED f-counter V-meter. Some hard to find parts used in the previous version, which are out of production for some time, has been ...09-07-2010
- Frequency meter with some of quite good performance, capable of measuring frequencies from 1Hz to 10MHz ...17-05-2013
- .. from the 2.5 V reference driven resistor string. S1’s 0.5 Hz square wave switching drive comes from the CD4040 frequency divider. The result of this action is a 100 mA biased 1 A 0.5 Hz square wave load applied to the ...22-06-2023
- .. LCD Display How does LC Meter Work? To be able to determine the value of an unknown inductor / capacitor we can use the frequency formula given below. Note that there are three variables that we can work with; f, L and C (f ...
.. and simplest LC inductance / capacitance Meters that one can find, yet one that you can easily build yourself. This LC Meter allows to measure incredibly small inductances starting from 10 nH to 1000 nH, 1 uH to 1000 uH, 1 mH to 100 mH ...30-10-2007 - .. 100 kHz. Note, however that this circuit is NOT a metal detector, but will detect metal wiring if it conducting ac current. Frequency response is from 50 Hz to about 100 kHz gain being rolled off by the 150 p capacitor, the gain of the ...
.. if desired. My probe is shown below: A layer of insulating tape or glue is used to secure the pen body to the inductor. Meter Circuit The output signal from the op-amp is an ac voltage at the frequency of the electro-magnetic field. This ...30-10-2007 - .. up to 12GHz depending upon type numbers these are also excellent noise sources, because of the extremely high cutoff frequency. Technical details are available on ordering. Stocked: 1N21B 1N21D 1N23ER 1N416B 1N416E from $3.58 What ...
.. is any 2.4Ghz RF transmitted? Here are the details on how to build a general purpose 2.4Ghz Radio Frequency Field Strength Meter. This one was built using the microwave rated diode from a MICROTEK solid state microwave leakage detector ...26-01-2010 - .. and discharged, but to measure high value capacitors, R8 cannot be decreased too much. The best way is to decrease the frequency for example, using a 4060 , and selecting the appropriate output. Then, the fine adjustment may be done ...
.. Design Idea presents a very accurate, yet very inexpensive, capacitance meter. It was specifically designed for measurements of low value capacitance with an accuracy of better than 1 pF ...18-09-2014 - .. the Q (quality factor) of a resonant circuit, crystal, or resonator by measuring its series resistance at the resonance frequency. The Q is linked to the series resistance by two simple equations (R S is the series resistance, L and ...
.. simple equations (R S is the series resistance, L and C the reactive elements and F R their resonance frequency): This Q-meter is unusual on more than one count: it is capable of displaying directly the value of the series resistance, and ...26-01-2015 - .. or currents. So I had to build my inductance meter myself. Figure 1. Inductance meter in action. It displays the resonance frequency together with the inductance The basic design is really simple (Figure 2). It a colpitts oscillator ...
.. Arduino Uno that lets you measure inductance. This is a functionality that I found missing in just about any digital multi meter. Yes, there are specialized LCR meters that let you measure inductance but they typically won’t measure ...11-08-2016
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