As the title says, this is just a sequel to my Project#5
Project showcase by Heathen_Hacks-v2
Super basic coding sourced from the web.
Project tutorial by Heathen_Hacks-v2
As the title says, this is a simple MAX7219 LED matrix module project for ArduiNOOBS.
Using the microphone of your mobile phone to control the led cube according to the loudness (decibels).
Project tutorial by Hassan Ibrahim
In this project I will show you how to build a simpler version of a 5x5x5 LED Cube. It means commanding 125 LEDs using one Arduino board
by MEGA DAS
LED cube 4x4x4, 64 LED diode, 16 forms of work.
Project showcase by MakerRobotics
Thanks for the comment.
Have you tried to double check everything? The connections, the wires, the code, the wires that are connected to the computer, etc.
If you have tried everything, I think you could use a different relay code and just add the MFRC522 code from this project to the one with the other relay code.
If it still failing, try a project with just the relay, or with just the RFID reader, maybe one those are malfunctioning.
If both of them are working correctly, try using a different code from a different source.
Thank you for the reply. The description of the product says
"The sound sensor module provides an easy way to detect sound and is generally used for detecting sound intensity. This module can be used for security, switch, and monitoring applications. Its accuracy can be easily adjusted for the convenience of usage.
It uses a microphone which supplies the input to an amplifier, peak detector and buffer. When the sensor detects a sound, it processes an output signal voltage which is sent to a microcontroller then performs necessary processing. "
I'm not sure about how many cards can be stored or saved, but, according to this link: https://github.com/martymcguire/ArduinoRFIDDB: "an ATMEGA328 has 512 bytes of EEPROM storage, can store 51 tags".
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