Inductance Meter Adapter Circuit, Turns Your Digital Voltmeter to Inductance Meter

Measuring inductance is important in making your hand-made inductors, especially when you do-it-yourself (DIY) your coil winding. An inductance meter adapter circuit would be helpful since you can measure inductance using your general purpose digital voltmeter (DVM). This circuit cost much cheaper compared to already made inductance meter instrument. Here is the scehamtic diagram of the circuit:

inductance meter circuit circuit schematic diagram

The circuit is very simple, containing only one voltage regulator chip and one NAND gates chip. This inductance meter adapter provide two measurement range, low range for measuring 3uH to 500uH  inductor values, and high range for 100uH to 5mH. Calibrating this inductance meter is easy. First you need to calibrate the zero offset. Connect your DVM to the output of this circuit, and select 200mV range for the DVM. Short the inductor measurement probe and adjust the sero calibration to give zero volt reading on your DVM.  To calibrate the low range, pick a known inductor around 400uH. Select 2V range for your DVM. Measure the inductor and adjust the low-cal pot to give 1mV per uH inductance. For example if you use a 390uH then you should adjust the low calibration pot to give 390mV reading on your DVM. To calibrate the high range, switch the range of the adapter circuit to high, and use it to measure a known inductor with values around 5 mH. Calibrate the high-cal pot to give 100mV reading per 1 mH inductance. [Source: Marc Spiwak]

This entry was posted in Test and Measurement and tagged . Bookmark the permalink.,
Possibly Related to "Inductance Meter Adapter Circuit, Turns Your Digital Voltmeter to Inductance Meter" Circuits

  • Simple pH Meter Circuit, A Low Cost Adapter for Your Digital Voltmeter
    What is A pH Meter? A pH meter is actually a precise voltmeter  that measures the generated voltage of a pH electrodes. The requirement of such meter is high input impedance and has the gain of  voltage-pH conversion. The standard … Continue reading →...
  • Digital pH Meter Signal Conditioner with Pulse/Frequency Output
    A signal conditioner for pH meter probe is required to have high input impedance. The signal conditioning of the pH meter probe is done by providing a buffer with gain, offset, and volatge to frequency converter. High input impedance requirement … Continue reading →...
  • Five-Decade Dynamic Light-Level Meter
    This is a Portable light-level meter circuit with five-decade dynamic range. This uses  a single cell battery as the power supply. To calibrate this circuit, use an appropriate illumination, then adjust R2 so that the output equals the reference. To … Continue reading →...
  • Digital pH Meter Signal Conditioner
    A pH meter circuit is basically an amplifier to boost a voltage signal which is produced by a pH probe. The pH probe itself is equal to a battery cell when submersed in the measured solution, producing a weak voltage … Continue reading →...
  • Capacitance Meter Circuit
    Capacitance meter is one instrument that you should have in your toolbox if you are an electronics hobbyist, or if you’re a professional electronic technician. If you can’t afford to buy such instrument or you you can’t find it on … Continue reading →...

Comments are closed.