Hello fellow-users
I have a question about the so called MP3-TF-player with 16 pins.

This player can play mp3 sounds/music from an enclosed micro sd card and it is run on +3.3-+5 Volts dc.
Internet is loaded with tutorials of this player in conjunction with ARDUINO.
I am NOT looking for solutions with ARDUINO but only for use as STANDALONE.
The switching ON/OFF is over GND pin 10 and pin 12/13 ADKEY 1 and/or ADKEY 2 by small pushpins and resistors. VCC is connected to power rail and ON requires less than 1mA (0.14mA)
It operates flawlessly but the problem is when I like to operate it by means of a DPDT relay, a mono stable relay or Bistable relay.
For instance the connection with a DPDT relay such as HK19F 5VDC and a simple push button (PB)


To switch this relay, the connections are as follows:
( I start with the pins of the relay)
PIN 1 and 8 connected with a "fly-back" diode
PB IN connected to GND-rail
PB OUT pin 1 GND
PIN 2 (common) is connected with GND-rail
PIN 4 (NO) is connected with GND PIN 10 and PIN 12 ADKEY1 of the player
PIN 8 is connected with +5Volt rail
Pin 7 (common) is connected with +5V rail
Pin 5 (NO) is connected with PIN 1 VCC of player.
So, when the relay is activated, de UPPER side of the relay will switch from NC pin 6 to NO pin 5 and is connected to +5Volt
The LOWER side will switch from NC pin 3 to pin 4 (NO) and connected to GND rail
Simple I thought !
IT IS NOT WORKING!!!!
It is only working when I disconnect the GND pin of player (pin 10) and connect this pin again with GND and only when VCC PIN 1 is directly connected to +5 Volt-rail and not through pin 7 (common).
RARARA? what is wrong??
NB: I have tested the relay on functioning with leds and motors. So, the relay is oké!
Can somebody help me??
Thanks in advance
regards
Henry
I have a question about the so called MP3-TF-player with 16 pins.

This player can play mp3 sounds/music from an enclosed micro sd card and it is run on +3.3-+5 Volts dc.
Internet is loaded with tutorials of this player in conjunction with ARDUINO.
I am NOT looking for solutions with ARDUINO but only for use as STANDALONE.
The switching ON/OFF is over GND pin 10 and pin 12/13 ADKEY 1 and/or ADKEY 2 by small pushpins and resistors. VCC is connected to power rail and ON requires less than 1mA (0.14mA)
It operates flawlessly but the problem is when I like to operate it by means of a DPDT relay, a mono stable relay or Bistable relay.
For instance the connection with a DPDT relay such as HK19F 5VDC and a simple push button (PB)


To switch this relay, the connections are as follows:
( I start with the pins of the relay)
PIN 1 and 8 connected with a "fly-back" diode
PB IN connected to GND-rail
PB OUT pin 1 GND
PIN 2 (common) is connected with GND-rail
PIN 4 (NO) is connected with GND PIN 10 and PIN 12 ADKEY1 of the player
PIN 8 is connected with +5Volt rail
Pin 7 (common) is connected with +5V rail
Pin 5 (NO) is connected with PIN 1 VCC of player.
So, when the relay is activated, de UPPER side of the relay will switch from NC pin 6 to NO pin 5 and is connected to +5Volt
The LOWER side will switch from NC pin 3 to pin 4 (NO) and connected to GND rail
Simple I thought !
IT IS NOT WORKING!!!!
It is only working when I disconnect the GND pin of player (pin 10) and connect this pin again with GND and only when VCC PIN 1 is directly connected to +5 Volt-rail and not through pin 7 (common).
RARARA? what is wrong??
NB: I have tested the relay on functioning with leds and motors. So, the relay is oké!
Can somebody help me??
Thanks in advance
regards
Henry