I used a philips TDA 1543 NOS dac and custom output transformers, plus Ian canada isolator II.
furthermore infrared, rotary encoder and 4.3 inch touchscreen (this one will be replaced for a larger one) there are also handles coming.
the rotary encoder and infrared is not that difficult for both there is a plugin for it.
the infrared works on +3.3 volts, ground and data.
the rotary encoder 3.3 volts, ground, output A clk, output B dt and switch (pushbutton) sw
and then a matter of installing and configuring the plugins.
for the infrared I use pin gpio 25 for data.
for the rotary encoder gpio pin 23 (output A) 24 (output B) 27 (switch)
the rotary encoder is type KY-040
infrared I used the following.
Thanks for your reply! The thing is, I went the Allo-route so I’ve got 3 hats on top of the Rpi, the top being the amplifier. Now I’m struggling with the “how” do I connect those rotary encoder wires to the correct GPIO pins, because the Allo hats are not compatible with standard GPIO throughput, so I understand. Any thoughts?
Sorry to hijack your project… it’s just that a rotary encoder would be the perfect add-on, I’ve also got a (7") screen in the front, which is nice, but the wife and kids would benefit from a classic volume controller in the front so yours is the perfect family-proof player in my opinion!
To add to the conversation…: how did you obtain those NOS Philips DAC’s? I can imagine they give a somewhat warm touch to the sound output?
by the way those philips dac and output transformers come from “dion audio” and i don’t think he has them for sale over the internet.
he recently had a pcm 1794 nos dac for sale but that ad has expired … maybe he still has it.
if you want to know more about this dac you should contact dion audio.
I used an ian canada PurePi power supply, it has a 5 and 3.3 volt output (5 volts for pi and at the same time for the Ian canada isolator II (configured in master mode) and 3.3 volts for the ian canada FifoMA reclocker)
this PurePi gets its 5 volts from an audiophonics Power Management and this in turn from a linear power supply that I have adjusted to 8 volts dc.
the 7.9 inch touchscreen gets 5 volts from a cheap switched power supply.
audiophonics-pi-spc-reg-power-management-power-supply to input Ian canada PurePi
ian canada PurePi to input raspberry pi and Ian canada FifoMA
8 volt output for audiophonics-pi-spc-reg-power-management-power-supply
the philips 1543 nos dac has a power supply of 12 volts - and + 12 volts.