I'm sorry, I wasn't paying attention to what I wrote as my 4yo daughter was speaking to me at the same time.
I meant info on the (main)boards, if they are available, from where and at what price.
If one can get a set of boards that covers input selection, output and volume control. Also, if it's possible to use remote for volume at least.
I'm sorry if this is covered somewhere in the thread.
No worries. It's a long discussion. 🙂
@meldano is the designer of this board set and this is his product. The information about these, including price, are mainly in the first post of this thread.
The documentation (v2) linked in the first post tells you all the important things. It's very thorough. Any other questions, @meldano is here all the time and answers quickly.
And as I'm going through my own build, I comment here on my experiences while it's fresh in my mind.
So ask away. Someone probably knows the answer to any questions. 🙂
@meldano is the designer of this board set and this is his product. The information about these, including price, are mainly in the first post of this thread.
The documentation (v2) linked in the first post tells you all the important things. It's very thorough. Any other questions, @meldano is here all the time and answers quickly.
And as I'm going through my own build, I comment here on my experiences while it's fresh in my mind.
So ask away. Someone probably knows the answer to any questions. 🙂
Hi,
I can't find the price for the mainboard(input select board), or is the same as for the controller PCB...or is the 12€ for both controller PCB and mainboard PCB?
Ah yes, you're right. The main board was 18€ when I bought mine recently. Apologies for directing you to missing information!
And to your functional questions above, yes to all.
- input switching
- volume control
- remote control
- output
One other thing in case you didn't catch it. If you're going to do balanced, then you need two of everything (except the microcontroller board--only one), one for each channel, since instead of the boards handling left and right in a single-ended configuration, they handle + and - signal.
Hi Daniel,
I replaced the faulty regulators and now I have proper voltage throughout. Good to go there. I also removed the resistor inline with the status LED and it blinks nice and bright so I can see what it's doing now. The uController is reacting to button pushes and IR commands. There doesn't appear to be any reaction on the main board, however.
I performed 2.1 and taught the system the remote control. It accepted all of the buttons I pushed and replied with the 4-time blinking of the LED. So that appears to have worked.
I also adjusted all parameters to make sure they were written to memory. Specifically set Max Input to 4, Start Input to 1, and Balanced Mode to 0 (testing the unbalanced set).
No amount of button pushing on the remote or knob pushing/twisting on the uC board trigger any kind of reaction from the main board. It does turn the LED on/off when muting it with the encoder button and remote control mute button.
Where would be a good place to start looking? My first probe was on the SCL line where it appears high all the time. But before I go poking around too much and risk shorting something, I wanted to ask your opinion on next steps.
I replaced the faulty regulators and now I have proper voltage throughout. Good to go there. I also removed the resistor inline with the status LED and it blinks nice and bright so I can see what it's doing now. The uController is reacting to button pushes and IR commands. There doesn't appear to be any reaction on the main board, however.
I performed 2.1 and taught the system the remote control. It accepted all of the buttons I pushed and replied with the 4-time blinking of the LED. So that appears to have worked.
I also adjusted all parameters to make sure they were written to memory. Specifically set Max Input to 4, Start Input to 1, and Balanced Mode to 0 (testing the unbalanced set).
No amount of button pushing on the remote or knob pushing/twisting on the uC board trigger any kind of reaction from the main board. It does turn the LED on/off when muting it with the encoder button and remote control mute button.
Where would be a good place to start looking? My first probe was on the SCL line where it appears high all the time. But before I go poking around too much and risk shorting something, I wanted to ask your opinion on next steps.
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Mute relay function
Hi Meldano,
Is the power on delay adjustable for the mute relay (relay5)?
Does it directly switches of when powering down? I need a power on delay of about 10seconds.
When the mute relay is closed, the wiper current through the Muses can reach mA’s with the 100r output resistors and an output signal. Can this do any harm to the Muses? Or am I missing something.
Two muses 72323’s are on the way, plan was to build two mono volume controls with the option to parallel both channels of the muses. However, the balance function will than not be working correctly with your micro processor.
Regards
Hi Meldano,
Is the power on delay adjustable for the mute relay (relay5)?
Does it directly switches of when powering down? I need a power on delay of about 10seconds.
When the mute relay is closed, the wiper current through the Muses can reach mA’s with the 100r output resistors and an output signal. Can this do any harm to the Muses? Or am I missing something.
Two muses 72323’s are on the way, plan was to build two mono volume controls with the option to parallel both channels of the muses. However, the balance function will than not be working correctly with your micro processor.
Regards
Hi Benson,
actually there is no option to increase the power up delay.
It is around 5 seconds.
Maybe an idea for a new version 😉
Also the relay switch off immediately after power off.
I have no problems with the 100Rs
actually there is no option to increase the power up delay.
It is around 5 seconds.
Maybe an idea for a new version 😉
Also the relay switch off immediately after power off.
I have no problems with the 100Rs
First part of installing my Muses volume control (V1) into my preamp today. I attached an isolator to the controller board and hooked it up to the power supplies and LED display.
Applied power and the display turned on and the rotary control incremented/decremented the level. The one negative is that the digits n the display are not of a consistent brightness, the left digit is good but the two on the right need to be brighter - any ideas other than trying a replacement module?
The power supply on the left provides 5V for the LED display (and its side of the isolator), the two LDO supplies next to it are the +/-15V supply to the controller board.
Tomorrow I'll try to train the remote control, double check all the voltages and plug in a Muses board.
Applied power and the display turned on and the rotary control incremented/decremented the level. The one negative is that the digits n the display are not of a consistent brightness, the left digit is good but the two on the right need to be brighter - any ideas other than trying a replacement module?
The power supply on the left provides 5V for the LED display (and its side of the isolator), the two LDO supplies next to it are the +/-15V supply to the controller board.
Tomorrow I'll try to train the remote control, double check all the voltages and plug in a Muses board.
Yes, the bezel was 3D printed. I am recycling a chassis and the bezel hides the old holes and labels - much cheaper than buying a new chassis!
Today I did some trouble shooting and have fixed the faint LED display and some intermittent glitches - the problem was a break in the wiring to the LED display so I replaced all of it and it now operates perfectly. I haven't used the remote control because I've mislaid the correct IR receiver and another type I had to hand doesn't work.
Hopefully some more progress tomorrow.
Today I did some trouble shooting and have fixed the faint LED display and some intermittent glitches - the problem was a break in the wiring to the LED display so I replaced all of it and it now operates perfectly. I haven't used the remote control because I've mislaid the correct IR receiver and another type I had to hand doesn't work.
Hopefully some more progress tomorrow.
Hi Ray,are you sure that you have connect the IR reseiver in the right way?🙂
Attachments
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Hi Thimios, so far, so good - thanks to your work assembling the boards!
Yes, I'm sure the receiver is connected correctly - I've checked it's datasheet and Daniel's manual. It is the correct frequency but doesn't seem to want to play. I have found some others and will try again tomorrow. Typically, I placed an order with Digikey about an hour before I couldn't find the one I had for it.
The wiring that was causing the problem earlier was from a a pack of ribbon cables I've had hanging around for ages - I checked it and found a couple of other strands with no or intermittent connectivity so the whole lot is now in the recycling bin.
Cheers
Ray
Yes, I'm sure the receiver is connected correctly - I've checked it's datasheet and Daniel's manual. It is the correct frequency but doesn't seem to want to play. I have found some others and will try again tomorrow. Typically, I placed an order with Digikey about an hour before I couldn't find the one I had for it.
The wiring that was causing the problem earlier was from a a pack of ribbon cables I've had hanging around for ages - I checked it and found a couple of other strands with no or intermittent connectivity so the whole lot is now in the recycling bin.
Cheers
Ray
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A small step forward this morning. I replaced the IR receiver with one of these;
https://www.velleman.eu/downloads/29/infosheets/ky0038_datasheet.pdf
and the muses controller board now seems to 'know' that there is an IR receiver connected - I can initiate the remote control learning process and get to the four bars across the top of the display but it doesn't seem to register the 'vol+' command - I assume if it did the display would change to four bars across the bottom ready for the 'vol-' command? I tried with three different remote control handsets so I'm confident that I'm transmitting an IR sigal.
Comparing the datasheet above with the one for the IR receiver in the BOM there are some differences, notably the output voltage, so I guess I'll have to leave the remote control section until I get the specified receiver.
https://www.velleman.eu/downloads/29/infosheets/ky0038_datasheet.pdf
and the muses controller board now seems to 'know' that there is an IR receiver connected - I can initiate the remote control learning process and get to the four bars across the top of the display but it doesn't seem to register the 'vol+' command - I assume if it did the display would change to four bars across the bottom ready for the 'vol-' command? I tried with three different remote control handsets so I'm confident that I'm transmitting an IR sigal.
Comparing the datasheet above with the one for the IR receiver in the BOM there are some differences, notably the output voltage, so I guess I'll have to leave the remote control section until I get the specified receiver.
The correct IR receiver was delivered today and was installed this evening - I now have functioning infra-red remote control.
Next weekend I will hopefully conenct up the Muses chip boards to the controller board and be able to get the volume control of my preamp workng.
Next weekend I will hopefully conenct up the Muses chip boards to the controller board and be able to get the volume control of my preamp workng.
Hello everyone,
Have a little problem here unfortunately and would appreciate some food for thought.
Have the unbalanced system with motherboard. And the whole thing 2x. Unfortunately, the remote control does not do what it should, actually it does nothing at all. The processor runs and flashes as it should. Only on inputs of the remote
It does not react. Strangely enough on both boards the same problem. Have already tried several remote controls. I have also replaced the sensor (TSPO 4838). Voltages are present. The strange thing is that the signal line is "almost" on ground. Am unfortunately with the digital not quite so fit. Maybe you have a tip for me.
Thanks greetings Markus
Have a little problem here unfortunately and would appreciate some food for thought.
Have the unbalanced system with motherboard. And the whole thing 2x. Unfortunately, the remote control does not do what it should, actually it does nothing at all. The processor runs and flashes as it should. Only on inputs of the remote
It does not react. Strangely enough on both boards the same problem. Have already tried several remote controls. I have also replaced the sensor (TSPO 4838). Voltages are present. The strange thing is that the signal line is "almost" on ground. Am unfortunately with the digital not quite so fit. Maybe you have a tip for me.
Thanks greetings Markus