When I had on 3.3V connected there was life on the Receiver Pi DDC and the ES9038Q2M Dual Mono II DAC only. 5V was available and on from the PurePi II. The FiFoPi Q7 was totally dead, no lights, nothing from the Monitor Pi Pro at all. I read the manual over a few times and kept stopping at the part where it said Q7 requires both 3.3 and 5V, Q7II is 3.3V only. Then after reading that 5V is transferred from the PuerPi II through the RPi GPIO pins I realized that the ReceiverPi DDC makes no connection at that level I realized that connecting 5V from the terminals on the PurePi II to the FifoPiQ7 was the only way to get it 5V. I re-read everything again, searched on here and came across a post where it said both voltages were required.
I took a small leap of faith and connected it and viola!
I get what you're saying and at first I felt the same way but I started probing with a meter and realized the 5V was needed but not connected
I took a small leap of faith and connected it and viola!
I get what you're saying and at first I felt the same way but I started probing with a meter and realized the 5V was needed but not connected
Anytime!... I used this power adapter https://www.adafruit.com/product/4298
This looks to be the same on Amazon.in https://www.amazon.in/Raspberry-Pi-...spberry+pi+official+usbc+power,aps,180&sr=8-2
This looks to be the same on Amazon.in https://www.amazon.in/Raspberry-Pi-...spberry+pi+official+usbc+power,aps,180&sr=8-2
Hi @sbelyo
I have reviewed the documentation to ensure nothing has been overlooked. Here are my observations for you to verify:
• In your stack, have you connected a GPIO connector received with DDC between Pure Pi II and DDC?
J6: Optional 5V Ultracapacitor Output
• J6 serves as an optional backup output and is internally connected to the same 5V output as J4. It can be used if required by the application.
• However, if GPIO power flow is established via the GPIO connector, J6 becomes unnecessary.
• Based on your setup—where Q7 functionality was achieved only after connecting J6 to the Q7 5V pin—it seems you may not have used a GPIO connector between Pure Pi II and DDC. Please correct me if I am wrong here.
Why Avoid J6 Connection?
• J2 is the only pure, fuse-protected output available. J6, on the other hand, is an ultracapacitor-based output, which is not pure.
• It is preferable to route power through J2 + GPIO, as this should work best for your stack.
Troubleshooting
• Important before making any steps or even making GPIO contacts. : Remove the J6 5V Pure Pi II connection to Q7 5V. Also remove Batteries from Pure Pi II
• Make sure GPIO connector is properly connected between Pure Pi II - DDC. Then from J2 3.3V of Pure Pi II make connections to both Q7 3.3V and DAC J1 which is AVCC.
Power ON the Stack with all remaining connections set. batteries also reconnect but no J6 connection please.
Should be all good by now.
• If your stack still fails to turn on or shuts down within 1-2 seconds of powering up, consider replacing the official RPi power adapter you are using. Try using a different 5V ≤ 3A adapter, such as a mobile charger or an iPad 5V 2.4A adapter, which tends to work well.
This must bring the stack Live utilizing full capability of Pure Pi II's ultimate Pure Power. All the Best!!!
I have reviewed the documentation to ensure nothing has been overlooked. Here are my observations for you to verify:
• In your stack, have you connected a GPIO connector received with DDC between Pure Pi II and DDC?
J6: Optional 5V Ultracapacitor Output
• J6 serves as an optional backup output and is internally connected to the same 5V output as J4. It can be used if required by the application.
• However, if GPIO power flow is established via the GPIO connector, J6 becomes unnecessary.
• Based on your setup—where Q7 functionality was achieved only after connecting J6 to the Q7 5V pin—it seems you may not have used a GPIO connector between Pure Pi II and DDC. Please correct me if I am wrong here.
Why Avoid J6 Connection?
• J2 is the only pure, fuse-protected output available. J6, on the other hand, is an ultracapacitor-based output, which is not pure.
• It is preferable to route power through J2 + GPIO, as this should work best for your stack.
Troubleshooting
• Important before making any steps or even making GPIO contacts. : Remove the J6 5V Pure Pi II connection to Q7 5V. Also remove Batteries from Pure Pi II
• Make sure GPIO connector is properly connected between Pure Pi II - DDC. Then from J2 3.3V of Pure Pi II make connections to both Q7 3.3V and DAC J1 which is AVCC.
Power ON the Stack with all remaining connections set. batteries also reconnect but no J6 connection please.
Should be all good by now.
• If your stack still fails to turn on or shuts down within 1-2 seconds of powering up, consider replacing the official RPi power adapter you are using. Try using a different 5V ≤ 3A adapter, such as a mobile charger or an iPad 5V 2.4A adapter, which tends to work well.
This must bring the stack Live utilizing full capability of Pure Pi II's ultimate Pure Power. All the Best!!!