Blue Ring Tester Schematic Diagram Exclusive [cracked] [WORKING]

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.

Here's a basic schematic diagram for a Blue Ring Tester: blue ring tester schematic diagram exclusive

Replace the red LED with a piezoelectric buzzer in parallel with a red LED. A shorted coil then produces a loud beep—useful when your eyes are on the probe. Has anyone modified this circuit to work with