Very nice setup Mllum!
I was also curious about the D1 circuit, glad it’s working out for you 😉
Lasercut - do you mean the top left pin of the stm32 chip there? The ISSI chip is just ram I think?
Morning all. I have 4 spare PSU1 pcb to share and alsoa load of Vunces dual to single opamp adaptor boards. I think I had 40 made.
Should anyone need anything like that.
Have a good diy weekend!
Should anyone need anything like that.
Have a good diy weekend!
@miro1360 , @vunce
I was wondering if the same combination of 13 bit delay and 32 bit register with 74HCT164 will work for AD1868, I heard its a very good DAC as well.
I have a dozen or more of them lying around.
I was wondering if the same combination of 13 bit delay and 32 bit register with 74HCT164 will work for AD1868, I heard its a very good DAC as well.
I have a dozen or more of them lying around.
@rehanabid The combination does work with AD1868, but the sound from AD1868 is not very good (tested by me). The output is voltage only ... rather go with AD1865 or AD1862, these are excellent and hard to beat 
Thanks @miro1360.
At times I feel lucky to have purchased some high end part almost 10-15 years ago and that included AD1865, AD1955, AD1862, LME49720HA, OPA627 Can type, directly from the distributors now I see ebay, aliexpress, bangood and many european sites infested with fake parts.
AD1865 based DAC is in process, redesigning the board with more room so that I could plug in Burson or use AD8610 in place of current OP AMPS. Will complete it as soon as I populate and start operating my own PCB designs off Bugle2 Phono preamp.
But thanks for the reply.
At times I feel lucky to have purchased some high end part almost 10-15 years ago and that included AD1865, AD1955, AD1862, LME49720HA, OPA627 Can type, directly from the distributors now I see ebay, aliexpress, bangood and many european sites infested with fake parts.
AD1865 based DAC is in process, redesigning the board with more room so that I could plug in Burson or use AD8610 in place of current OP AMPS. Will complete it as soon as I populate and start operating my own PCB designs off Bugle2 Phono preamp.
But thanks for the reply.
you still can buying ad1862 on chineese sites, but it is now ridiculous expensive, as expensive if not more than Rochester which are unused parts with premium guranty, since this project increase the purchases. I assume an AI on Alibaba is detecting that and informs their sellers customers.
I bought two at the beginning of the project but alas one had a broken leg from the the inside of the plastic body, so impossible to fix ! So at your own risk, you can also have close parts rebadged as the fakers, and I made an wording fault here, still exist and make up chips body marking... I assume some could sell their mother if they can...😡
I bought two at the beginning of the project but alas one had a broken leg from the the inside of the plastic body, so impossible to fix ! So at your own risk, you can also have close parts rebadged as the fakers, and I made an wording fault here, still exist and make up chips body marking... I assume some could sell their mother if they can...😡
I fixed a broken off IC leg before. Scraped off some of the plastic over the leg stub with a tiny jeweler screwdriver to expose the metal and soldered a new pin on. However, used a 10x microscope to do it.
believe me I tried, it was deep inside, and I scratched, could see the substract but nothing could be soldered ! Well I have to rebuy one to use the one which is said to be good as it's a pair of dac chip !
But the good news behind that is I purchased this time two good one from Rochester via Paddy Garcia to be sure to have good ones not risking with China seller anymore. I have already a pair from Rochester I purchased some times ago for the Painkiller discret Rogic IV with that chip, but I absolutly wanted a new onefrom Miro's cool design with oaps.
It's like the tda1541 dacs I have, I have a S1 single Crown offered by a gentleman living in Indonesia, Sumotan member, as I have late Taiwan made ones sounding different yet... a good chip is still important fore a good dac and so is the ad1862, if genuine, too 🙂
But the good news behind that is I purchased this time two good one from Rochester via Paddy Garcia to be sure to have good ones not risking with China seller anymore. I have already a pair from Rochester I purchased some times ago for the Painkiller discret Rogic IV with that chip, but I absolutly wanted a new onefrom Miro's cool design with oaps.
It's like the tda1541 dacs I have, I have a S1 single Crown offered by a gentleman living in Indonesia, Sumotan member, as I have late Taiwan made ones sounding different yet... a good chip is still important fore a good dac and so is the ad1862, if genuine, too 🙂
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Another AD1862 DAC is up and running 🙂
Up to now just driven directly by a Pi, so far from fancy, but running. Will add FifoPi with nice clocks and well made PSU.
THANKS Miro for this!
AD1862 from China are working. So they should work in EASYDAC as well...
BTW, the LED does not work, but voltage is OK.
Yet strange is, that both channels play the left channel signal. Headscrath... No right channel available.
Cheers, Ernst
View attachment 947910
Up to now just driven directly by a Pi, so far from fancy, but running. Will add FifoPi with nice clocks and well made PSU.
THANKS Miro for this!
AD1862 from China are working. So they should work in EASYDAC as well...
BTW, the LED does not work, but voltage is OK.
Yet strange is, that both channels play the left channel signal. Headscrath... No right channel available.
Cheers, Ernst
View attachment 947910
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@ernesternest Attachment is not working (contact the admin) ... Congrats to your working DAC 🙂
I am sure we will resolve the issue with easydac, now it seems like a short-circuit in the PCB 🙁 We will see more after your digital analysis 🙂
I am sure we will resolve the issue with easydac, now it seems like a short-circuit in the PCB 🙁 We will see more after your digital analysis 🙂
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Thanks Miro! Do you have an idea, why both channels play the left channel signal?
What would be the reason?
What would be the reason?
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The reason is somewhere in the digital logic circuitry. Post a few detailed pictures in the easydac thread, so can I see all parts 🙂
I would put some more flux on all pins and just go across all pins with soldering iron... Some pins on ic1 and ic2 you can still see pads...
And after resoldering I would clean the flux residue off so you can better inspect the results. This is what I use, it works really well;
https://uk.farnell.com/servisol/100019000/flux-remover-160-200ml/dp/3821470
https://uk.farnell.com/servisol/100019000/flux-remover-160-200ml/dp/3821470