Blue Ring Tester Schematic Diagram Exclusive Jun 2026

The tester identifies shorted turns in coils that standard ohmmeters cannot detect. It works by injecting a low-voltage pulse (approx. 600–650mV) into the component and counting how many times the circuit "rings" (oscillates) before the signal decays. A higher number of lit LEDs indicates a higher Quality (Q) factor and a healthy component. 1. Technical Schematic Analysis The circuit, originally designed by Bob Parker

The circuit drives a small analog meter or an LED array (depending on the specific revision). The meter deflection is proportional to the decay time of the oscillation.

The results are displayed across a series of colored LEDs (typically 8), providing a visual representation of the inductor's health. Blue Ring Tester Installation Guide | PDF - Scribd

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

By analyzing the decay rate (the number of "rings") of this oscillation, the tester measures the (Quality Factor) of the coil. High Q (Many Rings): Healthy component. blue ring tester schematic diagram exclusive

The schematic diagram consists of the following components:

The pulse must be sufficiently fast to stimulate high-inductance components.

+9V to +12V DC Input │ [ ] R1 (10k) │ ├───●───────┐ │ │ │ [ ] [ ] [ ] R4 (47k) R2 [ ] [ ] R3 [ ] (10k) │ │(10k) │ LM3914 LED Driver │ │ │ ┌─────────────────┐ Pulse Input ●───┼───────┼───►│ Pin 5 (Signal) │ (From MCU/555) │ │ │ │ │ │ [ ] [ ] === │ Pin 1 -> LED 1 │ [ ] R5 [ ] [ ] C2 │ Pin 10 -> LED 10│ [ ] (1k) │ │ (1nF) └────────┬────────┘ │ │ │ │ │ ●────────┴─●────────● │ │ │ │ │ │ │ │ │ │ ===== C1 ├─┐ │ │ │ [ ] R6 (10nF) │ └─┼────────┘ │ [ ] (22k) │ │ │ │ │ │ LM393│ │ │ ●──────────┴─►(Inv) ├───┘ │ │ (Non) │ │ [─] Test ▲ │ │ [─] Probes └────┘ │ │ │ └──────────────────────────────────────────────┴─── GND Components List IC1: LM393 (Low Power Dual Voltage Comparator) IC2: LM3914 (Dot/Bar Display Driver) Resistors: R1, R2, R3: 10kΩ (Metal Film, 1/4W) R4: 47kΩ (1/4W) R5: 1kΩ (1/4W) R6: 22kΩ (1/4W) Capacitors:

Understanding the Blue Ring Tester: Exclusive Schematic Diagram and Circuit Guide The tester identifies shorted turns in coils that

For actual schematics, you can refer to the AnaTek Blue Ring Tester Assembly Manual for authorized designs.

Often, you do not need to remove the transformer from the board (provided the winding isn't heavily loaded by other components).

The coil has a shorted turn or a severe internal short. Energy is damped immediately. Suspect / Weak

Electronics enthusiasts and technicians often face a common challenge: testing high-frequency magnetic components like flyback transformers, yokes, and inductors. Standard multimeters can measure resistance, but they cannot detect shorted turns within a coil. This is where the becomes an essential tool on your workbench. A higher number of lit LEDs indicates a

: 2N3904 transistors are commonly used for switching and driving components within the circuit. Functional Details

The capacitor in the tank circuit must be stable and high-quality (e.g., polypropylene) for accurate, consistent ringing.

Acts as the primary inductor in the resonant circuit. Capacitor ( ): Forms the LCcap L cap C resonant tank circuit with the DUT.