A twisted tale about a logarithmic relay attenuator - Page 67

regiregi22 · 6th December 2010, 12:27 AM

Are there any updates of the front display project? Any other official dedicated thread?

Regards,
Regi

novec · 6th December 2010, 08:06 AM

I'm working on a PIC18 based controller with seven segment output: YouTube - SevenSeg display with fade and flash. As I screwed up the PCB design for my JTs I haven't been able to test volume output yet, but display and control works nicely with volume up, volume down and mute pushbuttons (no pot). Still working on implementing IR remote in the code.

luvdunhill · 1st July 2011, 02:32 PM

guys, I have one of the very first iterations of this volume controller, and I have what I think to be a bad relay. I get instability in what I think is the 16th step, 32-nd step, then at the higher ranges much more frequent chattering and buzzing. In fact, when I get to the max, I get a humming sound. The strange thing, is this seems to have happened in both boards (it's balanced) simultaneously. Any pointers in troubleshooting this?

luvdunhill · 1st July 2011, 09:23 PM

Quote:

Originally Posted by luvdunhill

guys, I have one of the very first iterations of this volume controller, and I have what I think to be a bad relay. I get instability in what I think is the 16th step, 32-nd step, then at the higher ranges much more frequent chattering and buzzing. In fact, when I get to the max, I get a humming sound. The strange thing, is this seems to have happened in both boards (it's balanced) simultaneously. Any pointers in troubleshooting this?

nevermind, it's not a bad relay. things work when I stick a bench +5 supply after the regulator...

6th December 2010, 12:27 AM	#661
regiregi22 diyAudio Member Join Date: May 2009 Location: Madrid (Spain)	Are there any updates of the front display project? Any other official dedicated thread? Regards, Regi __________________ diyAudio, doing it as big as you can, JUST BECAUSE WE CAN!

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6th December 2010, 08:06 AM	#662
novec diyAudio Member Join Date: Aug 2005	I'm working on a PIC18 based controller with seven segment output: YouTube - SevenSeg display with fade and flash. As I screwed up the PCB design for my JTs I haven't been able to test volume output yet, but display and control works nicely with volume up, volume down and mute pushbuttons (no pot). Still working on implementing IR remote in the code.

1st July 2011, 02:32 PM	#663
luvdunhill diyAudio Member Join Date: Jul 2006	guys, I have one of the very first iterations of this volume controller, and I have what I think to be a bad relay. I get instability in what I think is the 16th step, 32-nd step, then at the higher ranges much more frequent chattering and buzzing. In fact, when I get to the max, I get a humming sound. The strange thing, is this seems to have happened in both boards (it's balanced) simultaneously. Any pointers in troubleshooting this?

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