Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Analogue Source Turntables, Tonearms, Cartridges, Phono Stages, Tuners, Tape Recorders, etc.

Anyone working on a Si4770 design?
Anyone working on a Si4770 design?
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 23rd November 2015, 02:15 PM   #21
rsavas is offline rsavas  Canada
diyAudio Member
 
Join Date: Aug 2012
Location: Ontario
Once again, no progress in this project.

Do you want a finished project, complete in a enclosure or are you able to help in the design?

The Si4770 design is still a concept and very little code has been written. I have a pcb done with one version using a spdif transmitter on it. Code is mostly low level as the I can use the existing portable radio media player code for the user interface.

It is in the queue, chip is still available, last time I checked, now that i can get really cheap pcbs, via pcbway, it is even easier to get a 100x100 pcb from china and get the design back going again.

I do see that silicon labs has newer chips that do it all, DAB, IBOC etc, but i have not investigated them and looks like a nda is required to get design info.

I did manage to get some other things done.
I got the lme49830 with semelab alf16n(p)16w lateral mosefet amp going in a old sansui g-7500 chassis. Now it needs a tuner in it, as I ripped out the analog rf tuner.
Body work on the old chev silverado 4x4

The only thing that I have designed and working/tested is the Si4735D60 chip in the portable radio, media player design? that design is dead as they discontinued the maxim max9729 part, so to get that design going I'd have to re-design the pre-amp section again. I made two protos and wrote a ton of code. They work great, now running for over two years.

That's it for my update.

Rick

Last edited by rsavas; 23rd November 2015 at 02:18 PM.
  Reply With Quote
Old 23rd November 2015, 09:19 PM   #22
Milo is offline Milo  Italy
diyAudio Member
 
Milo's Avatar
 
Join Date: Apr 2003
Location: Gorizia, Italy
Hi, I got the picture. Here my reflections:
- to-day, as SilLabs suggests, it is better to use their Si4689;
- if I can help? I have a good background in RF, old RF, as superetherodine receivers, antennas, etc., so if you need help in hardware, perhaps I could help or if you need to find some difficult to find components, I could help;
- No help in SW or programming. I am an analog man;
- I'm looking not for a complete radio with cabinet, but for a good working board up to the audio output, without the power supply, without the audio amp and without the loudspeaker;
- if you need support from SiLabs, I have a good connection with them, via one of their distributors. You ask and I'll try to get support

BR
Milo
  Reply With Quote
Old 23rd November 2015, 10:09 PM   #23
rsavas is offline rsavas  Canada
diyAudio Member
 
Join Date: Aug 2012
Location: Ontario
Hi Milo,

yes i did read the data sheet short on the si4689 and have glanced over an851.
another fine chip to work with and it is available at mouser.
i do not think si4689 is the same performance as si4770 but it is way more advanced.
Looks like i need to get an-649 and read that as well. i am missing the full device data sheet too. I have to login to Silabs and see if I can get that information.
I think the best for me is make a pcb with all 3 chips on it, si4735(6), si4770 and si4689.
My thinking to add the si4735 is that I already have a working design, nice to compare the performance of them all on one pcb. it will take a while to write code for si4770 and si4689. in the mean time one would have a working radio.
We have no dab or iboc in canada so i have no idea how i would test for it, unless I get a fancy R/S rf sig gen which are very expensive. my hp 8656b will not cut it?
also the pcb will need a xmega, display i/f encoders etc. i am not a fan of arduino because I use a xmega.
your thoughts on the pcb idea?

Are you interested in getting to learn the code?
i can help you there. i am a h/w (pcb designer) guy too, s/w is a a struggle for me, but i know enough to get a radio up and running.
I have updated the first entry in this thread and will post pics of the portable radio

Last edited by rsavas; 23rd November 2015 at 10:22 PM.
  Reply With Quote
Old 24th November 2015, 01:13 PM   #24
Milo is offline Milo  Italy
diyAudio Member
 
Milo's Avatar
 
Join Date: Apr 2003
Location: Gorizia, Italy
Hi Rick,

here my thoughts:
- si4735. I have had a look somewhere. There are still some hundreds pcs of it, cases SSOP and QFN, available, but I don't know how long they will be;
- AN649. I have it. If you give me yr personal mail, I'll send it to you;
- About pcb. I think it should be better to split the radio in more pcbs, 1 for RF, 1 for the power supply, 1 for the headphone amp and 1 for the audio amp, so, if you, to-morrow, want to change one of them, for many reasons, you have not to discard the other parts. If you mean how to design it, mmmh, it's different of how I was designing my analog receivers some years ago. Then all was analog and when you were able to keep very short connections, you were at the 80% of yr job. To-day it is completely different;
- about to learn the code. Why not? Thanks a lot. You have found a hard pupil!
- HP8656B. I think it is an excellent Signal Generator. It is not necessary, at the moment, to think of a R&S one, excellent too but too expensive in my opinion. Have you had a look at Rigol?
BR

Milo
  Reply With Quote
Old 25th November 2015, 02:33 PM   #25
rsavas is offline rsavas  Canada
diyAudio Member
 
Join Date: Aug 2012
Location: Ontario
I sent you a PM with my email address and more information.
I will look at what Rigol has to offer out of interest. I need a stereo encoder more at this point in time, any suggestions? I also have a HP 11715A test source pcb, for use in low THD measurements.
  Reply With Quote
Old 26th November 2015, 05:43 PM   #26
Milo is offline Milo  Italy
diyAudio Member
 
Milo's Avatar
 
Join Date: Apr 2003
Location: Gorizia, Italy
Ho Rick,

I am in a trip until Sunday and I have limited access to my mail. Sorry but I didn't get any PM from yr side.
My opinion is these ICs from SiLabs have so outstanding features that It is not necessary at the moment to buy expensive instruments to check their behaviour. It'd better to spend more time to design a very good layout and to choose the best SW solutions in order to make a really good radio.
BR
Milo
  Reply With Quote
Old 26th November 2015, 07:21 PM   #27
rsavas is offline rsavas  Canada
diyAudio Member
 
Join Date: Aug 2012
Location: Ontario
Okay I have sent you another PM. Once we exchange emails, I can send you my Si4770 design. If you would like to review the design that would be great. In the mean time I will open up the Si4770 design and review what I did a while ago.

Rick
  Reply With Quote
Old 12th January 2017, 02:43 AM   #28
n0ukf is offline n0ukf  United States
diyAudio Member
 
Join Date: Feb 2008
Send a message via ICQ to n0ukf Send a message via AIM to n0ukf Send a message via MSN to n0ukf Send a message via Yahoo to n0ukf
In my area, I have good signal reception of public radio news on a full power station but the public radio music is on the HD2 channel and rebroadcast on low power translator. I live too far from it for even half way decent reception of the translator on an indoor antenna and have not yet decided to spend the money on a(n expensive) HD radio receiver. When I first started shopping around, I was looking for one device that had both HD radio and internet radio... no luck at all on that combo.

The last couple days I have been toying with the idea of building an internet radio using Raspberry Pi (I've seen several such projects on youtube) but because internet isn't always reliable, I remembered my previous shopping and decided to look into also including HD radio in my project (seeing that one of those youtube projects had a menu item to choose source inputs).

Have you gotten anything to a working stage yet using the SI4777? I see Digikey has the chip in stock but being a surface mount device, I don't have the equipment to build something with it, so if someone else had a board built and working that would work with a Pi, I would love to buy one.
  Reply With Quote
Old 13th January 2017, 04:07 PM   #29
rsavas is offline rsavas  Canada
diyAudio Member
 
Join Date: Aug 2012
Location: Ontario
I was never intending on using a Si4777, only a Si4770, we have no IBOC in Canada.
I have no interest in internet radio.
This Si4770 design is stalled, as I am working on other designs at this moment.
  Reply With Quote
Old 14th January 2017, 03:02 AM   #30
ej25awd is offline ej25awd  Canada
formally hitachi_nut
 
Join Date: Jan 2007
Location: BC
Quote:
Originally Posted by rsavas View Post
I was never intending on using a Si4777, only a Si4770, we have no IBOC in Canada.
I have no interest in internet radio.
This Si4770 design is stalled, as I am working on other designs at this moment.
We now have IBOC in Canada, started last year in Vancouver,BC. Probably the same time in Alberta and Ontario. See the list below.

https://hdradio.com/canada/find-hd-r...nadian-station

Last year, 3 FM stations in Vancouver switched to IBOC (aka HD radio), I wasn't aware of this at first. I stumbled on it while testing a high end tuner after alignment, I noticed several of the test stations that I normally use for validating tuner alignment sounded different, and unlistenable. A quick internet search confirmed my suspicion.
  Reply With Quote

Reply


Anyone working on a Si4770 design?Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
IRS2092 Through hole working design jash2008 Class D 16 31st December 2011 12:05 AM
simple design not working. mail2vasu2004 Power Supplies 8 6th August 2010 08:19 PM
100W/8Ohm working design needed DigiSoft Solid State 17 27th March 2010 11:23 PM
Here's a design I'm working on... alitaido Chip Amps 7 11th July 2006 04:57 PM
My Stereo Encoder Design not working -- PLS HELP..! xitronics Everything Else 11 28th May 2005 03:51 PM


New To Site? Need Help?

All times are GMT. The time now is 11:50 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki