Blue | Ring Tester Schematic Diagram Exclusive

The heart of the circuit is the HEF4069UBP (or CD4069) Hex Inverter.

The Blue Ring Tester remains a staple because it finds faults that $500 digital multimeters miss. By understanding this schematic, you’re not just following a diagram—you’re mastering the physics of magnetic resonance. blue ring tester schematic diagram exclusive

Has anyone modified this circuit to work with an OLED display or a microcontroller for digital readout? I’m curious to see modern takes on this classic analog tool. The heart of the circuit is the HEF4069UBP

The name comes from the original blue PCB used in some DIY kits. Has anyone modified this circuit to work with

A: No. An LC meter measures inductance and capacitance. The Blue Ring Tester measures Q factor and loss—a different parameter.

(associated with the Dick Smith K-7205 kit), relies on a series of logic and timing stages: Blue Ring Tester Installation Guide - Inductor - Scribd