how do you send audio into eprom????

prorms · 25th February 2008, 07:29 PM

how do you send audio into eprom????
iam just wondering

gootee · 26th February 2008, 01:15 AM

Maybe you could use an ADC (Analog to Digital Converter). To get it out again, you could use a DAC (Digital to Analog Converter). You can find a lot of information about things like that at the chip manufacturers' websites, for example, http://www.national.com . They have many such ICs, each with a fairly-detailed datasheet that usually contains typical application circuit schematics. They also have many Application Notes, which often go into much more detail.

Of course, there are many details that I did not even hint at. You would probably also need either some other digital ICs, and/or a microprocessor of some sort, to manage the timing, addressing, etc etc, for the flow of data into the memory chip(s).

You could look into the PIC type of chips, and other similar types. Some of those include an on-board ADC. Some of their manufacturers' websites probably have application notes that come close to describing how to do what you asked about.

Someone with more digital knowledge than I have will probably be along, shortly, to give a more-coherent explanation and to fill in some of the gaps I left.

prorms · 26th February 2008, 01:57 PM

were in this schematic is the ad converter

http://hammer.ampage.org/files/Alphadrum.PDF

oshifis · 26th February 2008, 02:52 PM

There is no AD converter on the diagram. The audio samples are pre-burned in the EPROM. The article mentioned they would describe how to write the audio in the EPROM in their next issue...

25th February 2008, 07:29 PM	#1
prorms diyAudio Member Join Date: Nov 2006	how do you send audio into eprom???? how do you send audio into eprom???? iam just wondering

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26th February 2008, 01:15 AM	#2
gootee diyAudio Member Join Date: Nov 2006 Location: Indiana Blog Entries: 1	Maybe you could use an ADC (Analog to Digital Converter). To get it out again, you could use a DAC (Digital to Analog Converter). You can find a lot of information about things like that at the chip manufacturers' websites, for example, http://www.national.com . They have many such ICs, each with a fairly-detailed datasheet that usually contains typical application circuit schematics. They also have many Application Notes, which often go into much more detail. Of course, there are many details that I did not even hint at. You would probably also need either some other digital ICs, and/or a microprocessor of some sort, to manage the timing, addressing, etc etc, for the flow of data into the memory chip(s). You could look into the PIC type of chips, and other similar types. Some of those include an on-board ADC. Some of their manufacturers' websites probably have application notes that come close to describing how to do what you asked about. Someone with more digital knowledge than I have will probably be along, shortly, to give a more-coherent explanation and to fill in some of the gaps I left.

26th February 2008, 01:57 PM	#3
prorms diyAudio Member Join Date: Nov 2006	were in this schematic is the ad converter http://hammer.ampage.org/files/Alphadrum.PDF

26th February 2008, 02:52 PM	#4
oshifis diyAudio Member Join Date: Mar 2004 Location: Budapest, Hungary	There is no AD converter on the diagram. The audio samples are pre-burned in the EPROM. The article mentioned they would describe how to write the audio in the EPROM in their next issue...

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