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tda1387 dac pcb "front end"
tda1387 dac pcb "front end"
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Old 15th June 2018, 02:19 AM   #211
stellarelephant is offline stellarelephant  United States
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Join Date: Jan 2017
Location: Western NC
Originally Posted by matt_garman View Post
Although the RPi can technically draw up to 2A, if you are using it purely to shuffle PCM bits onto the I2S bus, power utilization should be well under 2A..
Well, I tried it. And...I have had great success powering my Pi with a 1A PSU after all! Boots every time and runs indefinitely. I am using another one of Greg Stewart's modified Jameco linear wall warts (4 total on my Pi stack now).

Let me just say that this PSU stomps all over my iFi iPower.

I could STILL hear noise from the iPower on the Pi, even with an isolator board in use! Now, with my entire stack powered by these bargain linear supplies, the noise is gone. The treble is cleaner and more relaxed as well...who knows why. Hard to believe. And it costs $20! Plus the cost of parts to mod it...not sure how much total. But I know Greg is planning to share his Jameco mods soon with a photo tutorial. Good stuff.
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