RT5047 U3 and U4
RT5047 U3 and U4
Hi,
U3 and U4 are 8 pin RT5047 modules on the schematic.
These do not exist in the BOM, nor in any text I have read. BATC shop sells a similar item but for the MiniTiouner 2 only.
Again, I maybe incorrect, but please can we have a mention about their use and availability in the BOM and/or the text.
And where may I buy them, please? I think that these are optional, as the power maybe supplied to the LNBs via a jumper matrix. Or not at all if you use a Bias-T.
I primarily used the BOM to source all the parts (in one hit) by automatic upload to Farnell.
From personal experience some kind of current limited LNB supply is essential as it did not take me long to short out mine!
So I added two Poly fuses to my MiniTiouner.
Do we add the BATC "RT5047 current limit PCB for MiniTiouner version 2" ? Looks like that is exactly the right thing electrically, not space wise.
Any guidance would be appreciated,
73, Mike
U3 and U4 are 8 pin RT5047 modules on the schematic.
These do not exist in the BOM, nor in any text I have read. BATC shop sells a similar item but for the MiniTiouner 2 only.
Again, I maybe incorrect, but please can we have a mention about their use and availability in the BOM and/or the text.
And where may I buy them, please? I think that these are optional, as the power maybe supplied to the LNBs via a jumper matrix. Or not at all if you use a Bias-T.
I primarily used the BOM to source all the parts (in one hit) by automatic upload to Farnell.
From personal experience some kind of current limited LNB supply is essential as it did not take me long to short out mine!
So I added two Poly fuses to my MiniTiouner.
Do we add the BATC "RT5047 current limit PCB for MiniTiouner version 2" ? Looks like that is exactly the right thing electrically, not space wise.
Any guidance would be appreciated,
73, Mike
Re: RT5047 U3 and U4
The U3 and U4 LNB PSU modules need to be constructed as part of the project. I believe that the PCBs are en route, together with another batch of the main PCB. Here's a photo from a development board that shows them. They fit into the sockets to the left of the PICs. There'll be a separate schematic and BOM for them.
The RT5047 board for the MiniTiouner isn't suitable for WinterHill.
Farnell have the RT5047A chips. There are several versions of RT5047.
.
The RT5047 board for the MiniTiouner isn't suitable for WinterHill.
Farnell have the RT5047A chips. There are several versions of RT5047.
.
Re: RT5047 U3 and U4
OK Brian,
I see - so that is another distinct project in itself, which is running concurrently.
I can get the parts, of course.
I will keep on the look out for more details.
73, Mike
I see - so that is another distinct project in itself, which is running concurrently.
I can get the parts, of course.
I will keep on the look out for more details.
73, Mike
Re: RT5047 U3 and U4
Hi Mike
It is a distinct project. I took the BOM parts off the main Winterhill BOM in the Wiki, they are still there but there in the spreadsheet but there no PCBs available yet, they are on their way from China. Meanwhile I have attached the BOM. Treat with great caution and if you find the correct Farnell parts add to the list for others.
Mike
It is a distinct project. I took the BOM parts off the main Winterhill BOM in the Wiki, they are still there but there in the spreadsheet but there no PCBs available yet, they are on their way from China. Meanwhile I have attached the BOM. Treat with great caution and if you find the correct Farnell parts add to the list for others.
Mike
- Attachments
-
- RT_Module.xlsx
- (1.15 MiB) Downloaded 704 times
Re: RT5047 U3 and U4
Thanks again - another hour on the internet coming up. Maybe tomorrow.
I did find it useful to use both RS and Farnell as some items were available at one and not another, and there was DigiKey too.
I am not making any kind of negative comments, far from it, just that for a project beginner its easy to miss the few vital mystery bits that go under the BOM 'radar' and the text on Wiki.
Mike
I did find it useful to use both RS and Farnell as some items were available at one and not another, and there was DigiKey too.
I am not making any kind of negative comments, far from it, just that for a project beginner its easy to miss the few vital mystery bits that go under the BOM 'radar' and the text on Wiki.
Mike
Re: RT5047 U3 and U4
There are 3 variations of the RT5047. Pin 7 of the IC can be N/C, Fault or comp. The Richtek documentation contradicts itself but I think the B version has the fault output. Colin G4KLB would know which worked for him. The comp input raises the output LNB by 1 volt. It should not be left floating.
Re: RT5047 U3 and U4
Hi,
Yes, all the more information, the better, for me. I shall look into the different variants.
And maybe anyone else just starting with this?
Ta, Mike
Yes, all the more information, the better, for me. I shall look into the different variants.
And maybe anyone else just starting with this?
Ta, Mike
Winterhill LNB supply PCB
Apologies - I forgot that Mike G0MJW had sent me some PCBs to put in the shop.
These are now available here: https://batc.org.uk/shop/lnb-supply-pcb ... -receiver/
in order to get them in the shop quickly, I linked to this forum thread for build information but we do need to include it on a wiki page - either a new one or the Advanced rxr PCB page.
73
Noel - G8GTZ
These are now available here: https://batc.org.uk/shop/lnb-supply-pcb ... -receiver/
in order to get them in the shop quickly, I linked to this forum thread for build information but we do need to include it on a wiki page - either a new one or the Advanced rxr PCB page.
73
Noel - G8GTZ
Re: RT5047 U3 and U4
I got mine from Farnell and Digikey on different occasions. The order codes are in the BOM file. RS don't appear stock them. I guess it's obvious but if you want to fit two modules, you are going to have to order twice as many of each part.G0LJF wrote: ↑Thu Mar 25, 2021 5:35 pmThanks again - another hour on the internet coming up. Maybe tomorrow.
I did find it useful to use both RS and Farnell as some items were available at one and not another, and there was DigiKey too.
I am not making any kind of negative comments, far from it, just that for a project beginner its easy to miss the few vital mystery bits that go under the BOM 'radar' and the text on Wiki.
Mike
Also bear in mind the RT module is an order of magnitude more difficult to build as it uses an SMD IC that needs to have the tab underneath soldered and there are quite a few small parts close together. It's not very hard but not the best choice for your first attempt at surface mount. I would say about the time you start cursing through hole parts for forever having to turn the board over to solder them in and them dropping out, or not being straight, actually finding putting the SMD parts easier, that's when you are ready.
Here is one, not particularly well built. I didn't get the chip in straight.
R4 and R5 are pull down resistors and need to be fitted in the latest Winterhill PCB. Initially these resistors were on the main PCB but Brian realised that if we kept them on the module, he could detect in software if a module was plugged in or not, which might be useful in future.
Mike
Re: RT5047 U3 and U4
Hi Noel
fyi I just tried to order two of these pcb's for my Winterhill, but could only buy one.
Question, do they come in pairs for £3.50 ? If so maybe make that a little clearer in the shop ?
73 Tim
fyi I just tried to order two of these pcb's for my Winterhill, but could only buy one.
Question, do they come in pairs for £3.50 ? If so maybe make that a little clearer in the shop ?
73 Tim