Recently took delivery of one of these amps, which I connected to my working RPi 3B loaded with MoOde. I initially connected it using a 19.2V PSU, one that I've successfully used to power my Zoudio amp previously.
No +5V. The board says 18V at the input terminals. So I tried a 16V PSU. Get +5V this time, but not for long.
The only way it runs with the 16V PSU is if I co-power it using the ordinary pi 5V input. It plays correctly. If I remove the additional 5V PSU, it drops out within a few seconds.
Do I have a defective AMP2 module?
HiFiBerry says it's supposed to power the pi and then some from the amplifier power input. I know the TAS amps are good for 24V and HiFiBerry only warns against using >18V with 4 ohm speakers... Implying it should work with , oh, 19.3V input and 8 Ohm speakers which I have.
I'm using the screw terminals, versus the quick connect for the PSU connection.
Any help would be appreciated. Thanks!
No +5V. The board says 18V at the input terminals. So I tried a 16V PSU. Get +5V this time, but not for long.
The only way it runs with the 16V PSU is if I co-power it using the ordinary pi 5V input. It plays correctly. If I remove the additional 5V PSU, it drops out within a few seconds.
Do I have a defective AMP2 module?
HiFiBerry says it's supposed to power the pi and then some from the amplifier power input. I know the TAS amps are good for 24V and HiFiBerry only warns against using >18V with 4 ohm speakers... Implying it should work with , oh, 19.3V input and 8 Ohm speakers which I have.
I'm using the screw terminals, versus the quick connect for the PSU connection.
Any help would be appreciated. Thanks!
Looking with my headset magnifiers at the components around the TI +5V converter chip, I see the 0.1 uf bootstrap cap is busted / off the board. Luckily, I fixed it with a leaded part soldered to the pins 1 and 8 of said chip.
Grain of pepper sized component that it is...
Mods - you can delete this thread; why waste the space?
Grain of pepper sized component that it is...
Mods - you can delete this thread; why waste the space?