Blue Ring Tester Schematic Diagram Exclusive 2021 -

: The tester injects a brief, low-voltage pulse into the parallel combination of an internal capacitor and the external inductor under test.

The output pulse passes through a switching transistor to isolate the logic from the test probes. A high-quality capacitor sits in parallel with the test leads. When you clip the probes to a transformer winding, this capacitor forms the resonant LC tank circuit. Clamping diodes are placed across the inputs to protect the sensitive ICs from high-voltage spikes generated by large inductors. 3. The Pulse Waveform Inverter (CD4069UB) blue ring tester schematic diagram exclusive

decade counter to drive the LED ring. Some modern variants use microcontrollers like the LED Array: Usually consists of 8 high-brightness LEDs Indicates low Q or a short circuit (Bad). Indicates marginal or medium Q. Indicates high Q (Good). Oscillation Circuit: : The tester injects a brief, low-voltage pulse

Over the past 15 years, dozens of forums have posted blurred, incomplete, or erroneous versions of this schematic. Here is what makes : When you clip the probes to a transformer

The inductor has a very high Q-factor. No shorted turns are present.