Hall-Sensor Based Interactive Record Player
Hardware- 1 Devlogs
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Troubleshooting help!
Hey, I just started wiring up my record player
I’m using an Arduino Nano, DFPlayer Mini, 8 Ω 0.5 W speaker, and a FAT32 microSD card with 0001.mp3 in the root directory.
The speaker makes a brief hum on power-up, but no audio plays. I’m using the DFRobotDFPlayerMini library over SoftwareSerial. My SD Card is 32GB FAT32, and I’ve tried 2 of them.
The DFPlayer blinks for a second when the card goes in but when I ran a diagnostic code it said Files Detected: -1
Does anyone know what the problem might be?
Arduino pin 11 (SoftwareSerial TX) → 1kΩ resistor → DFPlayer RX
DFPlayer TX → Arduino pin 10 (SoftwareSerial RX)
DFPlayer VCC → Arduino 5V
DFPlayer GND → Arduino GND
DFPlayer ↔ Speaker
Speaker wire 1 → DFPlayer SPK_1
Speaker wire 2 → DFPlayer SPK_2
Hall sensor (A3144) ↔ ArduinoSensor VCC → Arduino 5V (direct jumper, not through breadboard rail)
Sensor GND → Arduino GND (direct jumper)
Sensor OUT → Arduino D3 (moved from D2 during testing)
DFPlayer BUSY pin ↔ Arduino (added for diagnostics)
DFPlayer BUSY (a.k.a. IO2) → Arduino D4```