Turn your Digital Voltmeter into an Inductance and capacitance meter. Page 1. Page 2. Products 1 – 20 of 22 Source LCR Meter Accessories at ; the leading distributor of IT, Test Peak Electronic Design LLSm LCR Meter Adapter.

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If it isn’t, its probably because the thresholds on the 74HC14 are not symmetrically positioned around 2.

When it switched into position “L”, the measurement circuit operates as an inductance meter, see the Fig. Forums New posts Search forums. Author carbonzit Creation date May 25, If not, you may have too much inductance in adaptrr leads to LX or have connected LX to a noisey ground point. The voltage is negative.

The voltage regulator provides 6-Volts stabilized voltage for the circuit. The output waveforms can be both amplitude and frequency modulated. If you find the voltage to be very low, say under a volt, then this points to a wriing error, a problem with the 5V regulator or the battery, a damaged 74HC14, or you are using a very low resistance voltmeter.

The switch S2 is in position “L”. Potentiometer Questions Started by norbss Yesterday at adapetr Inductance and capacitance meter adapter for DVM This device is an addon to adaper digital or analog voltmeter. Started by fastline Yesterday at 8: I used it when developing a d.

It is a very useful bench test equipment for testing and finding out the frequency of various devices with unknown frequency such as oscillators, radio receivers, transmitters, function generators, crystals, etc. When the switch S1 is in “C” position, it connects another diode into the circuit, making a voltage doubler rectifier circuit see the Figure 3.


FOA – LC Connector adapter

This circuit is only accurate for broadband inductors. This LC Meter allows to measure incredibly small inductances making it perfect tool for making all types of RF coils and inductors. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. I adapted it to the components I had on hand and changed it so that it would work in the nanohenry to 50 microhenry range.

Use an DVM with high input impedance to measure a voltage across the capacitor “C”. If you use a DIP, your life will be much easier.

It’s small, power efficient, yet customizable through onboard 2 x 7 perfboard that can be used for connecting various sensors and connectors. Check out all five ranges.

Media New media New comments Search media. The switch S2 is in position “C”.

Inductance and capacitance meter adapter for DVM

The source of the voltage is negative pulses across the inductance Lx. The schematic diagram for the inductance and capacitance meter is shown in Fig. The Circuit The circuit’s operating principle is that if you make a pulse width proportioal to inductance, and keep the pulse frequency and amplitude constant, and then pass the pulse through a low pass filter so that only the average voltage comes out, the resulting DC voltage is proportional to the inductance.


Connect a battery and a DVM digital volt meteradaptsr a known inductor in mefer LX position then adjust the potentiometer until you get the anticipated reading on the DVM. Inductors with iron cores, high permeability ferrites, or with large amonts of shunt capacitance cannot be measured accurately. This device is an addon to a digital or analog voltmeter.

The meter is a perfect addition to any power supply, battery chargers and other electronic projects where voltage and current must be monitored. Click here to register now. Resource icon Inductance measuring adapter for multimeter By continuing to use this site, you are consenting to our use of cookies. A two deck rotary switch S1 selects one of five measurement ranges.

Inductance and capacitance meter adapter for DVM

A power supply of the circuit is a 9-Volt battery or any other voltage source. A switch S2 is used to configure the measurement circuit. Here are some things to check when calibrating: Pay particular attention to the leads and contacts for LX.

Just saying hello Started by MichaelaJoy Yesterday at 6: For example, inductace a 1 microhenry inductor and adjust the potentiometer to get mv on the DVM.