: Typically used for pulse generation and as a sensitive comparator for the ringing waveform.
+9V to +12V | +--------------+----------+----------+ | | | | [R1] [R2] [R3] [IC1] (555 Timer) | | | | +------[D1]----+----[C1]--+----------+ | | | | [Test] [Q1] [IC2] [LEDs] [Probe] (NPN) (LM311) (Ring Indicator) | | | | GND GND GND GND Use code with caution. Components List Timer (configured as an astable multivibrator). IC2: LM311cap L cap M 311 blue ring tester schematic diagram exclusive
A: No. An LC meter measures inductance and capacitance. The Blue Ring Tester measures Q factor and loss—a different parameter. : Typically used for pulse generation and as
Whether you are repairing a vintage arcade monitor, a high-end audio amplifier, or an industrial power supply, this tool will save you hours of guesswork. Build one. Keep it on your bench next to your multimeter. And when a junior technician asks, "How do you know the transformer is bad?" you can smile and say, "I heard its ring." IC2: LM311cap L cap M 311 A: No
Short the test leads together. The display should show zero LEDs or only the first red LED.
The circuit must be sensitive enough to detect even a single shorted turn in a winding containing hundreds of turns.