Blue Ring Tester Schematic Diagram Exclusive Jun 2026

The decaying AC ringing waveform is fed into a high-speed voltage comparator (like the or an internal microcontroller comparator).

: 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. blue ring tester schematic diagram exclusive

Protection

A timer circuit (often using a U1 timer or discrete transistors) creates the fast voltage pulse required to "kick" the inductor into resonance. The decaying AC ringing waveform is fed into

The ringing waveform generated across the test leads is an alternating current (AC) signal that decays over time. This decaying sine wave is fed into an inverter IC—typically a . The inverter squares up each oscillation cycle that passes its logic threshold voltage, converting the analog ringing wave into a clean series of digital pulses. Help with Blue Ring Tester - Arduino Forum Protection A timer circuit (often using a U1