: PDF versions of the full circuit diagram are frequently hosted on platforms like Scribd . Help with Blue Ring Tester - Arduino Forum
: If there is a shorted turn or a bad diode within the transformer, the energy is quickly absorbed, causing the oscillations to damp out almost immediately. LED Indicator Guide blue ring tester schematic diagram exclusive
The name comes from the original blue PCB used in some DIY kits. : PDF versions of the full circuit diagram
: It cannot detect an open-circuit winding. If a coil is completely broken, 0 LEDs will light up, mimicking a dead short. Always verify continuity with a standard ohmmeter first. : It cannot detect an open-circuit winding
: If the inductor is healthy (high Q), the oscillations will decay slowly, creating a long train of pulses (ringing). If the inductor has a shorted turn, the energy is quickly dissipated as heat within the short, causing the oscillations to damp out almost immediately.
I’ve cleaned up the diagram and compiled the build notes for the DIY community.