Blue Ring Tester Schematic Diagram Exclusive [top] Review

The Blue Ring Tester is highly valued for because its low-voltage pulses generally do not trigger semiconductors, allowing technicians to test transformers without desoldering them from the board. However, it is not foolproof:

: Most designs utilize a CD4015BE shift register or similar integrated circuit to sequentially light up a series of LEDs based on the number of successful oscillations (rings) detected. blue ring tester schematic diagram exclusive

Do not test a coil. With probes open (air core), the tester should show maximum ringing (Green LED). If it doesn't, your threshold comparator resistors are too sensitive. The Blue Ring Tester is highly valued for

The original design commonly utilizes a CD4015BE (dual 4-stage static shift register) or similar logic ICs to handle the sequential activation of the LED display. blue ring tester schematic diagram exclusive