I’ve cleaned up the diagram and compiled the build notes for the DIY community.
A shorted coil causes the ringing to decay so quickly that the comparator only sees one or two zero-crossings. This is sensed by a simple RC network (R4, R6) that charges a capacitor. If the capacitor charges above a threshold (good coil), the green LED lights. If it fails to charge (bad coil), the red LED lights.
If you want, I can:
The Ultimate Guide to the Blue Ring Tester: Exclusive Schematic Diagram and Operation
User interface
Using the Blue Ring Tester is incredibly straightforward. Connect your test leads across the primary winding of the transformer or inductor under test (ensure the circuit board you are testing is completely powered down and discharged).
: Low Q (Quality Factor), typically indicating a bad or shorted winding. Yellow LEDs : Marginal or medium Q. Green LEDs : High Q, indicating a good component. Key Components & Resources blue ring tester schematic diagram exclusive
To continue customizing this project, what do you plan to use, or Share public link
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. I’ve cleaned up the diagram and compiled the
Forget the marketing hype. The original designer chose a for a brutal, practical reason: