PecanPi - rPi R2R w/ headphone output
Jun 16, 2019 at 2:59 PM Thread Starter Post #1 of 2


500+ Head-Fier
Apr 16, 2017
I'm pretty happy with the rPi portable build and ran into an R2R rPi DAC.

I'm not sure if this can be portable because it akwardly extrudes. If a compact case can be created, then maybe.

Thoughts on specs?

I'm able to control with an IR remote control a la Tera Player so was hoping I can do something similar here.

PecanPi Implementation Details:

DAC chips:
Dual flagship Burr-Brown PCM1794As in monaural mode
Digital HW Volume Control and Re-clocking:
Crystek CCHD-575 oscillator -- ultra low clock jitter of 82fSec
SRC4193 for volume control
Output stage: True balanced dual different output stages
Uses OPA1612s
Low Noise Panasonic Resistors
Proprietary filtering topology
Ultra low noise analog power supplies:
TPS7A4700 (4.17uV noise) for positive op-amp power supply.
TPS7A3301 (16uV noise) for negative op-amp power supply
TPS7A4901 (15.4uV noise) for DAC Chips
Headphone driver:
Dual parallel OPA1622s
Last edited:
Jun 17, 2019 at 11:06 PM Post #2 of 2
I'm looking to do something portable like this minus the Hugo2. Just the rPi w/ R2R DAC. Hope a compact case is released.


Users who are viewing this thread