Blue Ring Tester Schematic Diagram Exclusive ((link))

: 10nF (0.01µF) 100V Polypropylene (MKP) capacitor. Do not use standard ceramic or cheap electrolytic caps here. Diodes : 1N4148 (Fast signal switching) for input clamping. Transistors : BC547 (NPN) for pulsing and general switching. LEDs : 8x Low-current 3mm Blue LEDs.

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: Keep the traces between the test leads, the protection diodes, and the 10nF tuning capacitor as short and thick as possible. Stray inductance or resistance in these traces can artificially lower the "Q" reading.

I have designed this to look like a high-value "share" within the electronics community. : 10nF (0

into a smooth DC voltage. The more pulses (rings) the coil produces, the higher the resulting DC voltage climbs across C2cap C sub 2

Connected in parallel with a high-quality, low-loss film capacitor (typically 10nF, 100V metallized polyester). Transistors : BC547 (NPN) for pulsing and general switching

![Conceptual Simplified Diagram – Hand Drawn Style]