Forum Replies Created
17. April 2017 at 11:47 #28284
So we have setup a JustBoom DAC with a rotary encoder on GPIO 23,24.
Followed the steps in our guide till the end of section 2 to configure the OS.
and the extra steps from M2P
and all works fine for us.
If you have a keyboard/mouse and a monitor or can access via SSH, you could run the alsamixer to verify that indeed the volume slider works with the rotary encoder.
I hope this helps.
31. Januar 2017 at 18:30 #26527
- This reply was modified 5 years, 9 months ago by JustBoom.
no problem at all. If that’s the direction you are going to maybe you want to also read my considerations here https://www.max2play.com/en/forums/topic/stromversorgung-7-touch-display/ although with the Amp you are in a better position with the pins on the P2 connector.
Have fun!30. Januar 2017 at 14:02 #26407
If you are not planning to use the Amp on top of the DAC HAT you can simply install a 20×2 header in P2. That replicates all the pins from the Raspberry Pi GPIO. You can find our pinout here https://www.justboom.co/technical-guides/boards-pinout/
If you are planning to use the Amp on top of the DAC HAT you can install a 20×2 right angled header on P2 of the DAC HAT so that the header is soldered from the top side of the DAC HAT. You will then be able to make your connections from underneath the DAC HAT before you plug it onto the Raspberry Pi. The wires will then be sandwiched between the Raspberry Pi and the DAC HAT.
In this case you don’t need a micro USB Y cable at all.
I hope this answers your question30. Januar 2017 at 13:47 #26406
sorry, my fault. The P2 on the Amp is not going to be good for you need. The reason I showed you the other boards pinout was really to say that the Amp HAT is the least good option for your project.
Yet if an Amp is what you need then the only option I can think of is for you to use the Hack3r board that allows you to duplicate the connectivity the GPIO header. On the Hack3r board you will then connect the Amp and the Display maybe by using a stacker header for the second card so that they do not physically overlap.
At this point you have sorted the electrical connectivity and the mechanical aspect. The pinout I gave you then will also help you determine if in fact you can use both cards at the same time. The power and ground pins are amongst the few things that can be shared so check for the other pins and if there is no overlap you are in luck.
I hope this answers all you questions.
Francesco28. Januar 2017 at 21:44 #26380
Hi, the Digi and the DAC both offer the possibility to install a header in P2
unfortunately the Amp was a bit too crowded to allow for the full header. The alternative here is to use something like the HAT Hack3r
25. Januar 2017 at 14:24 #26296
- This reply was modified 6 years ago by JustBoom.
the Amp Zero is supported in M2P. The Amp Zero, Amp HAT, Dac Zero and DAC HAT all use the same DAC chip so if you don’t find the option for the Amp simply select the DAC and all should be working just fine. In later versions of M2P I know the card selection has been expanded to include all options, in fact if you download the JustBoom version of M2P all our boards are already present.