Hifimediy T4 board - Page 11

jkeny · 1st July 2011, 09:23 PM

I just read the Hifimediy T4 product page & see that it can take PWM inputs directly. Has anybody used these inputs & have comments or how are people feeding this amp - doe sit have analogue inputs?

Centvrion · 1st July 2011, 09:30 PM

Of course it has analogue inputs...there's TC2000 controller doing the job;-)
To be honest I didn't find PWM input connector on the board....and I don't know any source with this kind of output signal...

jkeny · 1st July 2011, 09:32 PM

Sorry, I'm just catching up with this product so forgive my naive questions. This i staken from the T4 product page:
"It also have an PWM digital input which means it could be connected to digital out of the DDX amplifier for example or another amp with PWM output."
And
"*2nd PWM signal input."

Centvrion · 1st July 2011, 09:46 PM

Theorically it's all right...that chip has another PWM input...but if you look at the board ...Personally I can't see any PWM input (ther's only 4pin analog and shut-down service signal).
It's an interesting question to be done to Hifimediy; try to ask them.;-) Steiner is very kind and will answer you soon.

jkeny · 1st July 2011, 09:53 PM

I take it that there no manual with the board? There seems to be a bank of 10 hole solder pads just below the C47 capacitor - this may be where to connect?

Ampit · 7th July 2011, 05:50 PM

Quote:

bank of 10 hole solder pads just below

On other amps there are similar pads. To connect = nowhere. They must have other functions than to connect anything.

@WHALEMAN: Please give us your latest update with the board!

Thank you all

jkeny · 7th July 2011, 06:19 PM

These are the PWM input pads as confirmed by Steinar

- just looking for the pin designations to investigate marrying a PCM to PWM front-end with this board

Centvrion · 09:32 PM

Great news!!
Now the problem is to feed tha amp with a proper PWM signal...;-)

jkeny · 8th July 2011, 12:55 AM

Well there are a number of PCM(read I2S) to PWM chips from TI which I need t investigate - I'm sure they have been discussed here already - must search.

Centvrion · 8th July 2011, 09:49 AM

This is probably not the best one, but seems to be interesting.....
Should we open a new thread?

7th July 2011, 09:20 PM	#108
Centvrion diyAudio Member Join Date: Jan 2011 Location: Province of Bergamo	Great news!! Now the problem is to feed tha amp with a proper PWM signal...;-) Last edited by Centvrion; 7th July 2011 at 09:32 PM. Reason: Misunderstending....:-)

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1st July 2011, 09:23 PM	#101
jkeny Banned Join Date: Feb 2007 Location: Dublin	I just read the Hifimediy T4 product page & see that it can take PWM inputs directly. Has anybody used these inputs & have comments or how are people feeding this amp - doe sit have analogue inputs?

1st July 2011, 09:30 PM	#102
Centvrion diyAudio Member Join Date: Jan 2011 Location: Province of Bergamo	Of course it has analogue inputs...there's TC2000 controller doing the job;-) To be honest I didn't find PWM input connector on the board....and I don't know any source with this kind of output signal...

1st July 2011, 09:32 PM	#103
jkeny Banned Join Date: Feb 2007 Location: Dublin	Sorry, I'm just catching up with this product so forgive my naive questions. This i staken from the T4 product page: "It also have an PWM digital input which means it could be connected to digital out of the DDX amplifier for example or another amp with PWM output." And "*2nd PWM signal input."

1st July 2011, 09:46 PM	#104
Centvrion diyAudio Member Join Date: Jan 2011 Location: Province of Bergamo	Theorically it's all right...that chip has another PWM input...but if you look at the board ...Personally I can't see any PWM input (ther's only 4pin analog and shut-down service signal). It's an interesting question to be done to Hifimediy; try to ask them.;-) Steiner is very kind and will answer you soon.

1st July 2011, 09:53 PM	#105
jkeny Banned Join Date: Feb 2007 Location: Dublin	I take it that there no manual with the board? There seems to be a bank of 10 hole solder pads just below the C47 capacitor - this may be where to connect?

7th July 2011, 06:19 PM	#107
jkeny Banned Join Date: Feb 2007 Location: Dublin	These are the PWM input pads as confirmed by Steinar - just looking for the pin designations to investigate marrying a PCM to PWM front-end with this board

8th July 2011, 12:55 AM	#109
jkeny Banned Join Date: Feb 2007 Location: Dublin	Well there are a number of PCM(read I2S) to PWM chips from TI which I need t investigate - I'm sure they have been discussed here already - must search.

8th July 2011, 09:49 AM	#110
Centvrion diyAudio Member Join Date: Jan 2011 Location: Province of Bergamo	This is probably not the best one, but seems to be interesting..... Should we open a new thread?