Hi everyone,
I'm very new to DIY electronics and just learning, but enjoying myself so far!
Currently I'm trying to build a digital music player from a Tivoli Audio Model One FM radio. The loudspeaker is quite good, and the FM radio signal is getting phased out soon where I live.
The idea for the project is that powering on the player will make the Arduino choose and play tracks from the SD card randomly until turned off again.
Adjusting the volume using the front knob and a potentiometer may be an improvement later, but for now I'm sticking to just having the system play.
I've bought these components for the project:
- Arduino Uno
- Sparkfun MP3 Shield: https://www.sparkfun.com/products/12660
- Mono amp to sit between the MP3 shield and the speaker: TPA3110 https://www.ebay.com/itm/TPA3110-1-...l-Audio-Amplifier-Board-DC8-26V-/262451711067
- Tivoli Audio 4 ohm 5 w speaker: http://herculodge.typepad.com/.a/6a00d8341c6d1b53ef013483f52a21970c-pi (the one on the left)
- All inside an empty Tivoli Audio Model One case: http://ecx.images-amazon.com/images/I/71X9w4J7BXL._SL1500_.jpg
I followed this guide when assembling the MP3 shield onto the Arduino: https://learn.sparkfun.com/tutorials/mp3-player-shield-hookup-guide-v15
Using simple Arduino programming, it is playing well through the jack output to headphones. So far I have powered the Arduino through the USB port.
Scrolling down to the topic "Output Circuit Details" in the MP3 shield assembly guide, they mention that I should use "AC coupling" when not sending the output to headphones.
My questions boil down to these:
- Is "AC coupling" for the MP3 shield relevant in my case?
- What is the best way to power the Arduino/MP3 shield and the TPA3110 amp simultaniously using the same power source?
Cheers,
Jesper
I'm very new to DIY electronics and just learning, but enjoying myself so far!
Currently I'm trying to build a digital music player from a Tivoli Audio Model One FM radio. The loudspeaker is quite good, and the FM radio signal is getting phased out soon where I live.
The idea for the project is that powering on the player will make the Arduino choose and play tracks from the SD card randomly until turned off again.
Adjusting the volume using the front knob and a potentiometer may be an improvement later, but for now I'm sticking to just having the system play.
I've bought these components for the project:
- Arduino Uno
- Sparkfun MP3 Shield: https://www.sparkfun.com/products/12660
- Mono amp to sit between the MP3 shield and the speaker: TPA3110 https://www.ebay.com/itm/TPA3110-1-...l-Audio-Amplifier-Board-DC8-26V-/262451711067
- Tivoli Audio 4 ohm 5 w speaker: http://herculodge.typepad.com/.a/6a00d8341c6d1b53ef013483f52a21970c-pi (the one on the left)
- All inside an empty Tivoli Audio Model One case: http://ecx.images-amazon.com/images/I/71X9w4J7BXL._SL1500_.jpg
I followed this guide when assembling the MP3 shield onto the Arduino: https://learn.sparkfun.com/tutorials/mp3-player-shield-hookup-guide-v15
Using simple Arduino programming, it is playing well through the jack output to headphones. So far I have powered the Arduino through the USB port.
Scrolling down to the topic "Output Circuit Details" in the MP3 shield assembly guide, they mention that I should use "AC coupling" when not sending the output to headphones.
My questions boil down to these:
- Is "AC coupling" for the MP3 shield relevant in my case?
- What is the best way to power the Arduino/MP3 shield and the TPA3110 amp simultaniously using the same power source?
Cheers,
Jesper