Blue Ring Tester Schematic Diagram Exclusive Exclusive

[Pulse Microcontroller] ---> [Pulse Transistor] ---> [Protection Circuit] <==> [Inductor Under Test] || [10nF Tuning Cap] || [LED Display (8-10 Blue)] <--- [Microcontroller Counter] <--- [LM393 Comparator] Component Selection and Bill of Materials (BOM)

The is the industry-standard DIY diagnostic solution for this specific problem. Originally popularized by electronic repair experts like Dick Smith and Jestine Yong, this test instrument uses a high-efficiency Q-meter principle to evaluate the health of a coil instantly.

The wiring from the PCB to the test probes must be as short and thick as possible. Stray inductance in long test leads adds resistance and dampens the ringing effect prematurely.

: If the inductor is healthy, the energy bounces back and forth between the inductor and capacitor, creating a decaying AC voltage waveform (ringing). blue ring tester schematic diagram exclusive

Definitive shorted turn. The component is junk.

This 8-page PDF includes the complete schematic, PCB layout artwork, and a detailed theory of operation, making it the definitive resource for understanding and building the device.

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. Stray inductance in long test leads adds resistance

Mains coupling / sensing input

At the heart of the schematic is a momentary switch and a transistor or IC gate that sends a brief DC pulse into the component under test (L). This pulse "kicks" the inductor into resonance with a parallel capacitor (C) located inside the tester, creating a tuned tank circuit. 2. The Comparator Chain

: An internal capacitor in the tester pairs with the external coil's inductance, forming a temporary RLC tank circuit. This triggers a damped AC voltage oscillation known as "ringing". The component is junk

(low-ESR film) capacitor is placed directly in parallel with the test leads to establish the reference LC tank environment.

The tester is widely available as a DIY kit or pre-assembled unit: Anatek Blue Ring Tester Assembly and Review HD