Yahoo Groups archive

Homebrew PCBs

Index last updated: 2026-04-28 23:05 UTC

Message

Re: [Homebrew_PCBs] ESR Measurement Kit

2005-03-03 by Terry Mickelson

I bought the Australian designed kit for the "Dick Smith ESR meter" 
locally from a distributer close to me for $80 Canadian.
The meter measures low ohms from .01 to 99 on a two digit display using 
AC (actually it's pulses) instead of DC. It will measure capacitors in 
circuit or out but they must be discharged first.
I've found that my standard (used) electrolytic caps are usually good 
but some of the (used) Tantalums were highly variable and in one small 
batch, three of them got thrown out. The meter measures caps from 1 uF 
up to 10,000 uF. It doesn't measure accurately below 1uF. Caps below 
1uF aren't usually electrolytics in any case.
The meter will also measure resistors from .01 to 99 ohms. My regular 
ohmmeter doesn't do well below an ohm. As for the power supply, they 
supply two battery holders for 6 triple A's. I went with a plug in AC 
brick that supplies the 9 VDC. It's a switcher type that I found in a 
thrift store for 25 cents.
The kit has been well thought out and is easy to assemble but I had to 
measure the resistors first before installation because their color 
codes on a blue background are hard to read. After assembly, there was 
no need to calibrate as the readings were accurate as is.
Terry M

Attachments

Move to quarantaine

This moves the raw source file on disk only. The archive index is not changed automatically, so you still need to run a manual refresh afterward.