I need a music/LED fasher IC (only die)

[Athosworld]

I want to make an extremely cheap product with a speaker and two LEDs, the other components are no problem, but I need an IC that comes in a die form and I want to put a custom song to it, the IC must be a bare die, so I can put it in a Chip On Board assembly.
The IC must not require an oscillator or capacitor, I want to keep the thing as cheap as possible.
How can I send my music to a COB IC manufacturer so it introduces the song in the silicon wafer (custom)?

 

[danadak]

Quick and dirty way these days is just put it in flash. Thats doable at wafer test.

If you have high volume I am sure a number of vendors would talk to you
on die, TI, Cypress/Infineon, Atmel.....

Regards, Dana.

 

[Pommie]

Is it a song or a sequence of notes?

Mike.

 

[ronsimpson]

link Not what you want but ....

 

[Athosworld]

Is it a song or a sequence of notes?

Mike.

A song. I need to flash the song called Lonely Goatherd

 

[Athosworld]

link Not what you want but ....

Not reliable for mass production.

 

[Nigel Goodwin]

Not reliable for mass production.

As in your other thread, for COB devices you contact the manufacturer, and get a quote for how many tens of thousands you want manufacturing - or perhaps hundreds of thousands? - it's certainly not a low volume option.

 

[ronsimpson]

Not reliable for mass production.

Some one makes the COB on that board. Who = ?

 

[danadak]

A song. I need to flash the song called Lonely Goatherd

What is the songs file size/format or sample rate and length in minutes/seconds ?

You can google "embedded song calculator" to get an idea of how much flash you
will need. If you use compression, eg. MP3, you will need decode library.

An MP3 song of nominal 2 - 3 min duration takes ~ 2 - 4 MB of FLASH to store, so that makes
for an expensive part. You would have to compromise on sample rate significantly. But given
you are not driving (I gather) hi fi speakers you could try speech sample rates ( 6 - 10 KSPS)
and see how that sounds.

Assume a sample is a byte, song is 3 minutes, you sample at 6 KSPS then you will need

N bytes = 6000 SPS x 180 secs = 1 MB of FLASH, still a pretty big )and expensive) part.

What are your target die costs ?


Regards, Dana.

 

[Athosworld]

What is the songs file size/format or sample rate and length in minutes/seconds ?

You can google "embedded song calculator" to get an idea of how much flash you
will need. If you use compression, eg. MP3, you will need decode library.

An MP3 song of nominal 2 - 3 min duration takes ~ 2 - 4 MB of FLASH to store, so that makes
for an expensive part. You would have to compromise on sample rate significantly. But given
you are not driving (I gather) hi fi speakers you could try speech sample rates ( 6 - 10 KSPS)
and see how that sounds.

Assume a sample is a byte, song is 3 minutes, you sample at 6 KSPS then you will need

N bytes = 6000 SPS x 180 secs = 1 MB of FLASH, still a pretty big )and expensive) part.

What are your target die costs ?


Regards, Dana.

The song is a 10 second loop and in the lowest quality. Raw audio data. (PCM)
Less than 1 USD a die.

 

[Athosworld]

As in your other thread, for COB devices you contact the manufacturer, and get a quote for how many tens of thousands you want manufacturing - or perhaps hundreds of thousands? - it's certainly not a low volume option.

1500 of them aproximately.

 

[Athosworld]

link Not what you want but ....

Also, I don’t live where this store is located and it would be extremely costly to buy 1500 of them and then import them here.

 

[danadak]

I think you will be hard pressed to find a silicon vendor who will have
any interest in these small dice quantities, or a assembler who would
tackle this low a volume.

Good luck, Dana.

 

[Nigel Goodwin]

1500 of them aproximately.

That sounds remarkably low for a COB system - assuming you could get a manufacturer interested in such a small production run, it's going to be pretty expensive I would have thought?.

 

[Athosworld]

I think you will be hard pressed to find a silicon vendor who will have
any interest in these small dice quantities, or a assembler who would
tackle this low a volume.

Good luck, Dana.

Thanks.
I found a manufacturer (Nyquest) that makes one time programmable small COB boards.

 

[tumbleweed]

1500 of them aproximately.

If it's only 1500 units then I don't see that it matters a whole lot if it costs a little more in parts/assy.

 

[danadak]

Thanks.
I found a manufacturer (Nyquest) that makes one time programmable small COB boards.

Curious, what were their min volumes and what is the unit charge to you quoted ?


Regards, Dana.