This video is kindly sponsored by PCBway. Please give PCBWay a try for all your PCB needs. https://www.youtube.com/c/PCBWay

An ESR Meter is a very useful tool - but a proper one will cost you about $40-50. So let's see if we can build a simple ESR meter using a few components are that are easy to salvage from broken electronics. In this video I build the ESR meter from a circuit I found on the internet, then modify it to get it to work better and finally look at a few ways we could enhance it further while still keeping the cost to around $5

Let's build an ESR Meter!

Chapters
00:00:00 Intro
00:01:00 PCBWay Shared Projects
00:04:00 The Original Schematic
00:09:15 Selecting The Salvaged Components
00:20:55 Building The Project Prototype
00:47:08 Testing The Original Circuit
01:05:24 The LER Modification
01:08:36 Testing The LER Version
01:12:07 Analyzing The Results
01:12:46 Calibration
01:18:53 The $1 ESR Meter
01:20:54 The LER ESR Meter V2.0

If you use this link when creating a new PCBWay account and you will receive a free $5 discount coupon: https://www.pcbway.com/setinvite.aspx?inviteid=561767

Links mentioned in this video:
All you need to know about ESR Meters to fix stuff!
https://www.youtube.com/watch?v=bMUzTGnvrbU

Parts required for this project (affiliate links)
BC547B https://s.click.aliexpress.com/e/_DC9Sdpp
1N914 diode https://s.click.aliexpress.com/e/_Dnbs4gb
Inductor kit https://s.click.aliexpress.com/e/_DkI33zZ
Trimmer Potentiometer Kit https://s.click.aliexpress.com/e/_DkzAHRl


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Richard