Simple yet powerfull enough player. Purchased from: http://www.ebay.com/usr/worldchips
For complete description (in Polish) see: http://www.jarzebski.pl/arduino/komponenty/modul-mp3-z-ukladem-yx5300.html
Month: November 2015
RFID RC522 test
13.56MHz RFID reader RC522 with optional LCD 16×02 (1602) module and dual color diode connected.
Basic setup with just UNO and reader connected – see below. The code for such case with reading tags and using Serial output could be located in AddicoreRFID library.
HMC5883 GY-273 test
Basic setup to test HMC5883 on GY-273
Real images:
Just connect: GND, VCC (5V), SCL and SDA (I2C standard signals) to your Arduino. Older versions could use A4 for SDA and A5 for SCL, but with most up-to-date boards appropriate dedicated pins (see green and purple connection lines) could be used,
And another image with shorter connectors:
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