Blue Ring Tester Schematic Diagram Exclusive [upd] -

Unlike many testers, you can often test flyback transformers while they are still in the CRT chassis, saving hours of disassembly time [1].

const int testVoltage = 5; // Test voltage (V) const int testCurrent = 10; // Test current (mA)

I can provide or a custom code snippet for MCU-based testers. Share public link

A standard ohmmeter cannot detect a single shorted turn in a transformer. The resistance change is too small to measure. blue ring tester schematic diagram exclusive

void loop() int componentValue = analogRead(A0); if (componentValue > 100 && componentValue < 500) // Genuine component detected digitalWrite(LED_BUILTIN, HIGH); // Green LED else digitalWrite(LED_BUILTIN, LOW); // Red LED

: If the inductor has even a single shorted turn, the magnetic field collapses prematurely. The shorted turn acts as a heavy load, absorbing the energy and dampening the oscillations instantly.

Always ensure the equipment under test is powered off and capacitors are discharged. Unlike many testers, you can often test flyback

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

for automated PCB routing software

I have designed this to look like a high-value "share" within the electronics community. The resistance change is too small to measure

: Many designs use a CD4015BE (dual 4-stage static shift register) or similar logic to sequentially activate a series of 8 LEDs. Some modern DIY versions utilize microcontrollers like the Atmel AVR ATTiny24A .

Shorted turn, bad connection, or faulty component.

: PDF versions of the full circuit diagram are frequently hosted on platforms like Scribd . Help with Blue Ring Tester - Arduino Forum