Blue Ring Tester Schematic Diagram Exclusive -

This tester is used to detect shorted turns in high-frequency transformers, flyback transformers (LOPT), and switching power supply transformers without needing an LCR meter.

The is a specialized, high-performance Q-meter designed to send a high-frequency pulse into a transformer or coil winding, causing it to resonate or "ring."

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. blue ring tester schematic diagram exclusive

The ringing signal passes through R4/C3 (high-pass filter), then R5/C4 (additional filtering), and goes to a comparator or microcontroller ADC. The comparator counts the number of zero-crossings or pulses.

| | Ring Count (approx.) | Interpretation | | :--- | :--- | :--- | | Green | 7–10 | Good. High Q. Healthy winding. | | Yellow | 4–6 | Marginal. May work, but Q is degraded. Compare with a known good part. | | Red | 0–3 | Bad. Low Q. Almost certainly a shorted turn or a very lossy core. | This tester is used to detect shorted turns

: A modern alternative project using an Atmel AVR microcontroller for those interested in a digital version. Anatek Blue Ring Tester - Alltronics LLC

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 If the capacitor charges above a threshold (good

The "Blue Ring Tester" works by applying a fast voltage pulse to an inductor and counting the number of resulting "rings" (decaying AC oscillations).

Dampens the vibration immediately, causing the signal to die out rapidly.

The tester operates on the principle of in a parallel resonant tank circuit. The Pulse : The device injects a low-voltage pulse ( ) into the primary winding of the transformer under test.

Blue Ring Tester is a specialized diagnostic tool designed to test high-Q inductive components—such as flyback transformers (LOPT), switch-mode power supply (SMPS) transformers, and deflection yokes—by measuring their "ringing" response. Executive Summary: Device Overview