DIY: Make your own +15V DC power supply (for ES9038Q2M or other) (the cheap way)

okay, 😉
thought about the power supply (+15V or +/- 15V) for the ES9038Q2M (or the other Chinese-Boards, its basically the same); my bought,“normal“ 220V adjustable power supply has only 12V DC max and so i thought about another way; had a month ago a power supply for a Thinkpad T43, 19V i think, was sold and got today a HP power supply (for some printer)->32V..

2 (4) possibilities: either u buy directly a power supply from amazon/ebay/aliexpress->3$ and up

or use an old, unneeded one, like this HP one for printer for example, or laptop or something and buy a cheap „Step Down Power Regulator/Module“ from Aliexpress (of about 1,50$ and up)->

Input Voltage (this modul) 4-38V DC
Output Voltage 1,25-36V DC
Ampere max. 4A..
i read elsewhere that the ES9038Q2M only needs about ca. normal laptop or printer power supplies should be enough (this HP power supply has 625mA)
cut off the plug, and so u have your 2 wires to connect to your power step down module (or directly), adjust the right output voltage and wire it with 2 lines/cable up to the ES9038Q2M; easy as this 😉
(BUT, soundwise its really,really better to use a toroidal dual 15V transformer like this (25$)->
(or the ultimate HiFi-High End choice would be a „battery-pack“; for example a bike-battery 😉 😉 (12$+charger)

but for the „cheap“-beginning the above choice should be enough.. 😉

Programming-Subkurs I: IR-Receiver -> Raspberry Pi / + „Project 1“: Cambridge Audio Azur 540A Remote

because this site is all about „Building your own DIY-DAC“ 😉 (and audio in general) i just new invented a new category: Programming (Rpi+STM32) + „Projects“-> in this case „Project 1 – building your own Cambridge Audio Azur 540A Remote“ 😉
okay, got a wonderful IR-Receiver+Remote-Set (HX1838) from Aliexpress today->0,78€ !! (inkl.shipping)->Link

and have here at home an „Cambridge Audio Azur 540A“ – Amplifier..

(really good sound (more maybe later), got almost everyday better 😉 )
but with a really horrible, horrible IR-Remote->i have to point to from 1cm away 😉 ), so i thought i build an own ir-modul (receiver and transmitter) with this DIY-things and a STM32F103C8T6 „Bluepill“..
long story short: tried to setup LIRC on a RPI according to this TUT->
bu there was no output in the console..googled a lot and the solution is->“LIRC not working on Raspbian Stretch Raspberry Pi“->
„## 0.9.4 disruptive update
The configuration is so much changed that updating from 0.9.0 requires
manual intervention. This could be done using the update scripts or as
a completely manual process. Many users will always need some manual steps“
from here->
another thing is, its not a .sh file (as wrongly described) , but a python one, so->“sudo python3 lirc-old2new„..
(now it works..)
(more to come..)

Update DIY: STM32F103C8T6 („BLUE PILL“) + ST Link V2

got yesterday my STM32F103C8T6 (earlier post)->diy-stm32f103c8t6-blue-pill-oled-tft-display/
1,55€ (inkl.shipping)->Aliexpress -> Link
first->its smaller than i expected (see 2.picture) and its very „friggling“..

i thought, no problem, i use my Pi, wire it up like in some Youtube-Videos, use the Arduino IDE and begin to upload a sketch etc..
but:Wasn´t“ ; ) always a „STM32flash -> „Device init failed
(use btw. first my USB-serial adapter with RX,TX and ground->Arduino said:“Device not recognized“)..
googled through a thousand STM32-Arduino-forum/threads, millions of hours, and the final conclusion is:

Buy a ST-Link V2 !! -> 1,68€ Aliexpress -> Link

directly from the beginning (with a STM32F103C8T6)->strongly adviced/recommended from my side here too !! 😉
(hope this will do the trick !! (toi,toi,toi->german phrase)) 😉


so, has wonderful pricey DIY-things, like cheap DC-DC Converter Module 3.3-13V to +/-15V by example but also a lot of DIY-Hifi-equipment..found it originally by their ES9028Q2M Audiophonics-made „Audiophonics I-Sabre ES9028Q2M TXCO„-HAT..
can be also expensive, u have to look exactly, but as said also relatively pricey things and they resident in the EU->means shorter shipping-times (for me)..
interesting site..😉

HDMI I2S LVDS to I2S Input Module HDMI I2S LVDS to I2S Output->24,90€->

2.6″ TFT-lcd (320*240) SPI Arduino Mega 2560 *mcufriend*

lucky me, i got today my 2.6″ (320*240) SPI-TFTLCD-display directly from china, of about 3,40€ !! 😉 (inclusive shipping), unbelievable, from Aliexpress..

all in regard of my planned DIY-DAC (see some posts before and therefore the website is all about 😉 ), cause this TFT-LCD should show the input-source (USB,Coax,Opt.), sampling frequency, filter settings (FIRs), Volume (db) and so on..
okay, there was no information on the sellers-site about the chipset in it (and i need the info for the different Arduino+Raspberry GFX-libraries) i had to google a lot and will now show the „results“:
First, in this special TFT is an „ILI9341„; read out on a RPI3B with „fbtft_device“->

second, problem now was, because there were absolute no documentation about the pin-layout on the backside, how to wire it for SPI ?
so, a lot of googling again and here are the results Part II.:

so, my final wiring is now:
3,3V (5V is not working) Pin5 from the 6pin header at the bottom->to RPI Pin1 (Power)
GND Pin2 from the 6pin header->RPI Pin9
MOSI to MOSI !! means „SD_in“ on the first picture -> RPI pin19
MISO to MISO means „SD_Out“ ->RPI pin21
CS to „SD_CS“ ->RPI pin24 !! (CE0) ((not pin26)->CE1)
and SCLK to „SD_SCK“ ->RPI pin23..
(unfortunately i have only a light screen here now, but i guess it has something to do with the software; i will make here an update if necessary)..
(just as info for other user with similar problems)..
good tuturial: SPI on a raspberry pi->

AK4113 + CS8416 Digital-Receiver SPDIF to I2S converter+ software control + 1602 LCD wiring-diagram

after i looked about some cheap SPDIF (Coax+opt) to I2S converter, i came across these 2 birds:
AK4113: (10$ at Ebay & Aliexpress)and CS8416: (12$ at Ebay & Aliexpress)
they are both capable of max 192khz input and u can select the input-port via the „BUT“-port switch..
The LCD-display should show the Input-Line and the sample-frequency..
and because there were no wiring diagram on the sellers-site i searched a bit/lot and found some wiring-diagrams for these 2 on
(just in case there were also google-user who are interested in such a diagram)

DSD-LED (+Volume and FIR-Buttons) on these ES9028Q2M-Boards..(DIY)

because here is so much feedback/and website-views on this ES9028Q2M i thought i write  something about it again..
after thinking about programming this STM 8S103F3 MCU on the board (and see some Arduino IDE tuturials to become a LED blinking par example->—v32/experiment-1-blinking-an-led , super nice a MUST to watch !! 😉 ) and examining the layout i see that there are also these „Vol+“,“Vol-„, „Delay“ (means filter-settings (FIRs) i think) and the „DSD“ + „PCM“ holes for Diodes/LEDs..


so i think u need only an LED (i would say Blue for DSD and Red for PCM) and a 220 Ohm-Resistor->


to make this LEDs „shine“ 😉
also with such Buttons (here i had measurements about 1cm*0,7cm (100mm*70mm)) it must be possible to have a HW-Volume and Filter-Control..
but u have to solder it right 😉 ..

another possibility would also be to solder some 4 Male 2.54mm Pin Header on it, and connect it then to a STM32F103C8T6 by example to control it via this (and with a bluetooth-receiver-transmitter and bluetooth-app par example..)
still thinking about; greets for the moment 😉


DIY: STM32F103C8T6 („Blue Pill“) + Oled (TFT-) Display..

bought some STM32F103C8T6 („Blue Pill“) of about 1,55€ (1,72$) !! at Aliexpress->Link
thought i could use it for my planned own DIY-DAC to display input-source, samplerate, filter-settings, volume etc..

also a 2.6 “ TFT (240X320)->Link (Youtube-Vid is with an 0.96 OLED)




you can program/flash it with a Raspberry Pi->Link, no need for a usb-ttl adapter or ST-Link or something..

so, and with this Arduino IDE u can write some little programms/“sketches“ and write/upload them directly to the chip..
now i must a find a way to read out some information (from maybe a XMOS-USB-Bridge) about the samplerate for example, or maybe which input (USB (I2S), opt, coax) and write it out on a display..
but super no clue at present !! 😉 , i´ll inform you here about some progress..

1 2 3