so, 😉 because its a little bit silent around here lately, we still don´t know if the „Blue“ ES9038Q2M has a „shitty“ pcb and the „green“-ones sounds better, i have still buffer/“lock“-problems in windows using the V4.36 Singxer-driver on the Skysong-XMOS-USB in sample rates above 16/44 i wanted to use the onboard-HW-volume control, to which u can connect a normal 10kOhm-potentiometer (see pictures) easy..
i tested it here, and it works far not so good as expected and i guess u have a very small range of about 20% or so (in my feel) too.. i thought i could easy use the Arduino with analogwrite () and connect one pin to the middle of the onboard-3 pin but what i´ve read so far is that the Arduino can only send out PWM-signals so u need an external digital potentiometer (thats what i´ve read so far, don´t know if its true) and control it via the (in this case) SPI-bus/protocol.. for this u can buy a cheap MCP, in this case a MCP4131 of around 0,89€ and a Dip-8 socket (0,51€) etc.,etc..(more to come..) (very good tutorial for this right now: http://www.learningaboutelectronics.com/Articles/MCP4131-digital-potentiometer-circuit.php)
i will post here any „improvements“ (and (maybe) a full tut) asap..!! 😉
so, 😉 today, after 60 !! days, my LCD1602+I2C-modul finally arrived..(2.00$ Aliexpress->LINK) i have already a 2.6″ TFT-LCD display (320×240), but also want to check these 1602-LCDs (its „standard“ for the „real“-Arduino-User 😉 ) okay, there is not soo much to tell, except that i havent bring it to work in „full mode“ so far because (and thats why i write this article here too) it was the „hell again“ 😉 soldering the I2C-modul (in this case i took a 16pin pin-strip) on the LCD-PCB.. so if u can find a 1602-LCD with a I2C-modul already soldered on it, take it ;-).. i extended my Bluetooth-IR-sketch now with a „blink“ from the whole display (“ lcd.backlight(); delay(250); lcd.noBacklight(); delay(250);“ 😉 everytime i make a command, type a „value“ via the Bluetooth-App; as confirmation.. Its blue and i first thought i print the source („CD,DVD,XMOS-USB etc..)“ on it; but there are no characters on it by now cause i guess i have to solder some pins again ;-(.. useful sketches i´ve found so far were:“identify the I2C-adress from the modul („i2c_adress.ino“) and a simple sketch to get data via the serial monitor and print it on the screen..(.inos and links here->http://essabre-90xx-rpi.sfb2.com/forum/showthread.php?tid=19 )
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..
so, 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->https://tutorials-raspberrypi.de/raspberry-pi-ir-remote-control/ 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->https://www.raspberrypi.org/forums/viewtopic.php?t=192891 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..)
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“ ; )..got 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:
so, Audiophonics.fr 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..😉