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LC Meter Details

SMD Tweezers

Documents and data for version 2 below
PIC based L and C Meter - Version 3

Kits now available

CNC machined panel

Update - from 1 Feb 2016 all Full LC Meter Kits supplied will include a CNC machine cut front panel

No more trying to cut out a rectangular hole for the display - that's now all taken care of! The slide-in front panel is now accurately machine cut with all the apertures. You do still need to drill the power and switch holes in the end plate - but at least they're round!

Test Jig for wired and SMD components

As an alternative to the SMD Measurement Tweezers, which can sometimes give misleading results on low value inductors, I have introduced a PCB test jig. The jig slips onto the terminals of the meter as shown below, and will accept wired components of 2.5, 5 and 7.5mm spacing, as well as 1206, 0805 and 0603 SMD's.

Jig shown on LC Meter terminals
Component locations on the jig

LC Meter Details and Options

A revised version of the LC Meter kit is now available in two forms:

Full Kit

Functionally as the previous version with a few cosmetic changes:

Short Kit

Functionally the same as the above kit, but supplied with no case or overlay. The redesigned PCB can be used 'stand-alone', or can be installed in a case of your choice. The old PCB was not really suitable for this, since there was no room for creating mounting holes, and the battery was unattached.

Completed LC Meter V3
Short kit version built

The new Technical Manual is here

A copy of the Drilling Overlay can be downloaded here

Make sure that your printer is set to 100%, and that 'shrink to fit' is turned OFF before printing this file!

Read the RadCom review article about the kit. The reviewed product was the Version 2 kit - functionality is the same, but there are cosmetic and construction differences in V3

Note: Since the review was published, the PCB has been updated to improve the pad size, and the manual has been updated to reflect the recommendations made.

Important information and Errata is to be found here

Claimed range is 0.1pF to >100nF, and 0 to >10mH Accuracy is claimed as +/- 1% of the reading, +/-0.1pF or +/- 10nH

It certainly performs well against other bridges that I have, and is considerably better at low inductance vaues than some other devices currently on the market in the UK

Kits include PCB, programmed PIC, and all hardware and components - please see the Kits, Prices and Ordering page.

SMD Measurement Tweezers


I can now offer these excellent little tweezer sets - ideal for use not only with the LC Meter, but also with your multimeter for measuring R's - especially those you find when you clean up the bench after some building work!

The tweezers are well constructed in RG174 coax, terminated at one end in the tweezer mechanism, and at the other in two good quality 4mm plugs. See the
Kits, Prices and Ordering page for more details.

Version 2 Archive - Note this version is no longer available

This product started off as a club construction project, and has developed from there. As you can see from the picture below, it is a fully engineered implementation of Phil Rice's (VK3BHR) excellent LC Meter
Click here for the Technical Manual, including assembly and set-up guide.

A copy of the Drilling Overlay can be downloaded here

Make sure that your printer is set to 100%, and that 'shrink to fit' is turned OFF before printing this file!

Completed LC Meter - graphics are for my club project version

This version uses a PIC16F628 and a 1 x 16 character LCD, with a PCB layout to fit a standard Hammond enclosure - giving a neat overall piece of test equipment. In addition to the basic design provided by Phil, the PCB includes the extra circuitry required to implement Microchip's ICSP (In Circuit Serial Programming), and also allows the optional use of a backlit LCD such that the backlight is permanently on when the unit is externally powered. When run from the internal battery the backlight is not accessible. Note that the kits I supply include an LCD that DOES NOT have a backlight.

Page created: 29.07.2008

Last updated: 7 Feb 2016