This article is for educational purposes. Always observe safety procedures when working with high-voltage circuits. Flyback transformers and SMPS primaries can store lethal charges even when unplugged.
Blue Ring Tester is a specialized diagnostic tool used to test the health of high-Q (low loss) inductive components, such as flyback transformers (LOPT), deflection yokes, and switch-mode power supply (SMPS) transformers. Anatek Instruments blue ring tester schematic diagram exclusive
The circuit is designed for high sensitivity and safety, operating at low voltages that allow for in-circuit testing without damaging sensitive semiconductors. Integrated Logic: This article is for educational purposes
Most modern Blue Ring Testers replace the analog comparator with an or PIC12F683 . The MCU: Blue Ring Tester is a specialized diagnostic tool
Blue Ring Tester is a specialized diagnostic tool used to identify shorted windings in high-Q inductive components like flyback transformers (FBT), switch-mode power supply (SMPS) transformers, and deflection yokes. Unlike a standard ohmmeter, which only measures DC resistance, a ring tester applies a fast voltage pulse to the component and counts the resulting resonant "rings" (damped oscillations) to determine its quality factor, or Core Schematic & Component Overview
The name comes from the original blue PCB used in some DIY kits.
: A detailed one-page PDF showing the sequential LED control circuit.