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Arduino based LDR volume and source selection controller
Arduino based LDR volume and source selection controller
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Old 8th January 2018, 02:03 PM   #921
sorinv is offline sorinv  Romania
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Thanks for the warning.

The headphone amp would be powered by a separate power supply, this is why I was asking about the power relay control on the LDR board. I'll just keep it powered on all the time anyway.
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Old 5th February 2018, 07:22 AM   #922
zdr is offline zdr  Belgium
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I have one fully assembled and tested set for sale including power supply that can be adapted to US voltage, with the original PCB and BOM specs from Vincent, apart from 4x2 IO board which is smaller and does not switch the ground and therefore using only half of the relays. I can bundle it with OLED or LCD.

You would only need to add a box, power and RCA connectors.
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Neb. [LDR Volume Control OLED firmware:]
https://drive.google.com/open?id=0B7...ENmRXNYUEtySVE
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Old 5th February 2018, 03:20 PM   #923
Joca is offline Joca  Portugal
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need help

I have a AIO from Zdr and the 2004 LCD. I only have one input and output attached to the board. I made the calibration process but in the end my lcd doesnt respond to the controller input. it hangs. what could be the problem? My LDR values are LSE-100
LSH-125
RSE-73
RSH-99
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Old 5th February 2018, 03:48 PM   #924
Joca is offline Joca  Portugal
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i have the "narrowing conversion" problem in the verification process but the code updates. The Lcd seems to be working in the calibration menu. Only the normal operation hangs after some 2 or 3 seconds of turn on.
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Old 5th February 2018, 04:37 PM   #925
Joca is offline Joca  Portugal
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problem solved or at least i find it. If i touch the unpluged pins of the arduino nano (tx, Rx) with a feather pressure the lcd refresh nicely. So, i think it could be the absence of earth wire. will see and post.
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Old 26th February 2018, 10:50 AM   #926
yurgs is offline yurgs
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Location: Nuremberg, Germany
Default error 1 , error 2

i had great fun assembling the LDR cotroler and the powersupply.
i uploaded the Nano and it seems to work!
here are some pictures of my build.
Preamp - stereoscope

unfortunately i dont seem to be able to get it to calibrate.

i started with setting the bias, it seems rather difficult to adjust.
(when i switch to "bias Adjust" the Multimenter shows about 1mr, and it slowly goes down to 800k.) then i set it to 700k
i measured the res:
1: 100r
2: 161r
3: 114r
4: 195r
Voltage is 4.96V

after updating the code i started calibration but it finishes either with error 1 or error2
the bias always seems to drift.
am i doing something wrong here?

Thanks !
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Lenco L75/ Jelco 750L/ Denon DL103 Shibata // Hypnotoad's AD797 Pre // LDR Arduino Controller // chocoholic's Liteamp // Prestigeous 2 Monitor
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Old 3rd March 2018, 07:47 AM   #927
yurgs is offline yurgs
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i have got Nebs AIO Board, and i used NSL-32SR3.
the Mosfets are FDV301N.
i checked Resistor Values for the Biasing circuit, they are ok.
Is changing the Optocouplers really the only thing left i can do here?
Any Help would be apreciated
thanks!
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Lenco L75/ Jelco 750L/ Denon DL103 Shibata // Hypnotoad's AD797 Pre // LDR Arduino Controller // chocoholic's Liteamp // Prestigeous 2 Monitor
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Old 3rd March 2018, 08:12 AM   #928
zdr is offline zdr  Belgium
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Quote:
Originally Posted by yurgs View Post
i have got Nebs AIO Board, and i used NSL-32SR3.
the Mosfets are FDV301N.
i checked Resistor Values for the Biasing circuit, they are ok.
Is changing the Optocouplers really the only thing left i can do here?
Any Help would be apreciated
thanks!
I believe it's written somewhere in the code comments that if any value is higher than 150, ldrs should be replaced.
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Neb. [LDR Volume Control OLED firmware:]
https://drive.google.com/open?id=0B7...ENmRXNYUEtySVE
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Old 3rd March 2018, 08:15 AM   #929
yurgs is offline yurgs
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Thanks for your reply,
i checked the code, it says
any value above 200r should be replaced.
maybe i have to order some in anyway..
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Lenco L75/ Jelco 750L/ Denon DL103 Shibata // Hypnotoad's AD797 Pre // LDR Arduino Controller // chocoholic's Liteamp // Prestigeous 2 Monitor
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Old 3rd March 2018, 08:24 AM   #930
zdr is offline zdr  Belgium
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Quote:
Originally Posted by yurgs View Post
Thanks for your reply,
i checked the code, it says
any value above 200r should be replaced.
maybe i have to order some in anyway..
Make sure you don't have anything on the outputs and inputs while calibrating, and that you did not make any soldering mistakes. I would not change ldrs before everything is triple checked. Check all the resistor values around fets.
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Neb. [LDR Volume Control OLED firmware:]
https://drive.google.com/open?id=0B7...ENmRXNYUEtySVE
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