It is ease to build and to adjust. (you will need only to set the zero !)

From left to right ...

RCA top unknow L , RCA bottom to digital meter.

Left key HI - LO L option.

Right Key HI - LO C option

RCA top unknow C , RCA bottom to digital meter

Measures 3µH to 7mH

Reading directly on a external digital voltmeter (DVM or VOM).

Using a single IC 74HC132 (or HCT)

Measuring a 27µH inductor (blue)

Measuring a 6.8µH inductor (blue)

Measures 2.2pF to 2.2µF

Reading directly on a external digital voltmeter (DVM or VOM).

Using a single IC 74HC132 (or HCT)

The RCA, in back, is power supply input (8 to 15Vcc)

There are a lot of wires... and few components..

I use some multi-turns trimpots, because I have a lot in my scrap box, you will use just a simple trimpot. At right top of the picture you may see the 7808 common regulator for both circuits, but a single 78L08 is OK.

2. Simple and precise Lcmeter ... wait

3. PIC Lcmeter... wait