FreeFi-232 v2

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danielj
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Re: FreeFi-232 v2

Post by danielj » Wed Jul 18, 2018 6:48 pm

I'd recommend getting a temp controlled iron - it makes life much easier. Lots of people on here use the Hakko fx888d - good value and good quality. Do make sure you get it from a genuine distributer, as there are quite a few counterfeit ones doing the rounds.

SMD seems daunting at first but it's really not bad, and you can make much neater boards with it. The other piece of kit that's essential is a magnifier - I use one of the head mounted ones which has a little LED lamp on it.

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Elminster
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Re: FreeFi-232 v2

Post by Elminster » Wed Jul 18, 2018 8:32 pm

hoglet wrote:
Wed Jul 18, 2018 6:05 pm
colonel32 wrote:
Wed Jul 18, 2018 5:45 pm
I should definitely get some practice in. Can you do get stripboard fine enough to play with drag soldering?
Not that I've seen, but you can get practice kits:
That is a good idea, pretty obvious when you think about it. Might be worth having a couple to keep ones hand (and eye in). I am always worried I will forget how to do SMDs. Although as I have about 5 smd board to do 9once the freewifi is released) I think I shall be gettin glots of practice myself.

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Elminster
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Re: FreeFi-232 v2

Post by Elminster » Wed Jul 18, 2018 9:06 pm

As i am doing a massive parts order for all my outstanding boards,I thought I might order the parts for the FreeFi-232 v2 while I was at it.

Is this the latest schematic viewtopic.php?f=3&t=15211#p205375 to work the parts from, or do you have a BOM to hand?

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danielj
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Re: FreeFi-232 v2

Post by danielj » Wed Jul 18, 2018 9:16 pm

It's the one on github - it should be just about right (although I don't think it's the right USB connector):
https://github.com/stardot/esp8266_mode ... ge/BOM.csv

Once I'm sure it works I'll put up a proper BOM. The only things likely to change are the number of resistors required and the USB connector. However, don't hold me to that.

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Elminster
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Re: FreeFi-232 v2

Post by Elminster » Wed Jul 18, 2018 9:26 pm

Ah good a BOM thanks. Been trying to work out parts from schematics and screenshos all evening (on other boards), a nice BOM is what I need.
Last edited by Elminster on Wed Jul 18, 2018 9:26 pm, edited 1 time in total.

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Elminster
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Re: FreeFi-232 v2

Post by Elminster » Thu Jul 19, 2018 9:15 am

Oooo. So you have wedged a standard DB25 DSUB solder type around the PCB and then solder it to either side?

Edit: Is that switch 6x6? It looks like a rectangle in the picture but that could be an optical illusion.
Last edited by Elminster on Thu Jul 19, 2018 9:21 am, edited 1 time in total.

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danielj
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Re: FreeFi-232 v2

Post by danielj » Thu Jul 19, 2018 9:29 am

Yes.
Socket: RS Stock No.544-3828
Switch: RS Stock No.756-1644
MAX3237: RS Stock No.660-7685

The rest should be fairly straight forward. Make sure the tants are case size B and 10V or more.

d.

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Elminster
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Re: FreeFi-232 v2

Post by Elminster » Thu Jul 19, 2018 9:38 am

Thanks. Typical I have a load of SMD 6x6 tactile switches (ordered by mistake once) and you choose a different size. I have the Max coming from mouser, which is cheaper if doing a large order. I thought about posting my BOM on the thread but if it is wrong and everyone orders those bits I wouldnt be popular :-)

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danielj
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Re: FreeFi-232 v2

Post by danielj » Thu Jul 19, 2018 9:40 am

I'll post a full BOM once I've finalised it, along with RS part numbers. Patience :)

d.

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Elminster
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Re: FreeFi-232 v2

Post by Elminster » Thu Jul 19, 2018 9:57 am

Done. Excluding cost of PCB and pin headers (which I have) cost comes out around £16.69 for parts.
Last edited by Elminster on Thu Jul 19, 2018 9:58 am, edited 2 times in total.

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danielj
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Re: FreeFi-232 v2

Post by danielj » Thu Jul 19, 2018 10:26 am

How much were you paying for the esp-12?


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danielj
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Re: FreeFi-232 v2

Post by danielj » Thu Jul 26, 2018 8:46 pm

OK, bit of testing has occurred with the PCBs. There was one change that needed to be made. New version uploaded to github (R2 has become 470R and has changed location and what it's connected to).

The 2.4 version of the board that I have will work, and is bodgeable (don't fit R2, remove some solder resist, cut track, solder 470R SMD resistor across the cut). If anyone would like a pair of this version (yes, you get two on a mini-panel), I'm happy to send out for postage.

d.

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1024MAK
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Re: FreeFi-232 v2

Post by 1024MAK » Fri Jul 27, 2018 1:16 am

Bung some my way please :wink:

Mark

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danielj
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Re: FreeFi-232 v2

Post by danielj » Fri Jul 27, 2018 6:26 am

1024MAK wrote:
Fri Jul 27, 2018 1:16 am
Bung some my way please :wink:

Mark
Will do. Better write up a final list of parts :?

d.

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sydney
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Re: FreeFi-232 v2

Post by sydney » Fri Jul 27, 2018 8:05 am

I'll have one please.

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danielj
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Re: FreeFi-232 v2

Post by danielj » Fri Jul 27, 2018 8:40 am

Sure - drop me a PM with details.

BOM and RS order numbers on the wiki:
https://github.com/stardot/esp8266_modem/wiki/Hardware

Here's the modification that needs to be made:
DSC_3819.JPG
You need one of these to program it:
https://www.ebay.co.uk/itm/231918152528

The programming pins are labelled with the names of the pins they need to be connected to on the FTDI board, not the function of the pin on the ESP12.

And need to put pins in the DTR/RTS holes on the right hand side, and make sure it's set to 3.3V. I'll start putting together more details.

I am going to order some boards without the defect and proper pads for the resistor on the top side of the board, but I can't guarantee how many of these will be available.

Here's a built one next to the first built version:
DSC_3818.JPG
Last edited by danielj on Fri Jul 27, 2018 9:51 am, edited 4 times in total.

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Elminster
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Re: FreeFi-232 v2

Post by Elminster » Fri Jul 27, 2018 2:59 pm

So next board run is 2.5, is that the ‘finished’ one, I.e. all known fix from above fixed? Will compare my bits list with yours and see how accurate I was! I shall probably wait another week before ordering anything, havng an enforced week or two off Retro.

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danielj
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Re: FreeFi-232 v2

Post by danielj » Fri Jul 27, 2018 3:49 pm

Elminster wrote:
Fri Jul 27, 2018 2:59 pm
So next board run is 2.5, is that the ‘finished’ one, I.e. all known fix from above fixed? Will compare my bits list with yours and see how accurate I was! I shall probably wait another week before ordering anything, havng an enforced week or two off Retro.
Yes, 2.5 should be the final version - it has the bodge-fix incorporated properly. The only think you'll be missing (I suspect) is a 470ohm SMD resistor.

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danielj
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Re: FreeFi-232 v2

Post by danielj » Wed Aug 08, 2018 9:25 pm

I can confirm that version 2.5 of the board (as is currently in the repository) works perfectly. I've got a version of the zimodem firmware (more fully featured, but still needs a bit of tweaking) in my github that I've set up to work with this hardware, or the firmware in the esp8266 stardot repo can be used.

Choices, choices, etc.

I have a few of these to build but any left over PCBs will be up for grabs (Duncan, I have your name against one, don't worry!). I do, as mentioned above, have lots of the v2.4 PCBs - I'm not building these into anything, and they can be quite easily modified to work properly :)

d.

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Re: FreeFi-232 v2

Post by marcusjambler » Wed Aug 08, 2018 9:42 pm

Hi Daniel

Is there any chance I can get a built one please [-o<

Marcus

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danielj
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Re: FreeFi-232 v2

Post by danielj » Wed Aug 08, 2018 9:48 pm

I'm really not getting into building them for sale I'm afraid :( Of course, anyone is free to make them or people could club together and buy the bits to make it a bit cheaper? I just don't really want to get caught up building loads of these and then having to support/repair etc...

d.

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Re: FreeFi-232 v2

Post by marcusjambler » Wed Aug 08, 2018 9:55 pm

I understand Not a problem.... I can box up the rig I've got

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Elminster
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Re: FreeFi-232 v2

Post by Elminster » Wed Aug 08, 2018 10:16 pm

I have my BOM of materials sorted now, plus back from holidays, for about 8 different types of board (11 in total), but as the cost comes out at £200, I shall probably order after payday, and order everything in one go. So a board would be good if spare, otherwise I shall add them to my 'to buy' list.

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Re: FreeFi-232 v2

Post by danielj » Thu Aug 09, 2018 7:55 am

Finished version:
DSC_3847.JPG

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Elminster
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Re: FreeFi-232 v2

Post by Elminster » Thu Aug 09, 2018 8:43 am

Very nice. Did you size the PCB so that it fits in a (particular) project box by chance?

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danielj
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Re: FreeFi-232 v2

Post by danielj » Thu Aug 09, 2018 8:52 am

Nope. :D
Last edited by danielj on Thu Aug 09, 2018 8:52 am, edited 1 time in total.

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Re: FreeFi-232 v2

Post by daveejhitchins » Fri Aug 10, 2018 7:23 am

danielj wrote:
Thu Aug 09, 2018 7:55 am
Finished version:
=D> Looking Great =D>

Dave H :o)
Parts: UM6502CE, GAL22V10D, GAL16V8D, AS6C62256A, TC514400AZ, WD1772, R6522, TMS27C512, AT28C256
Products: ARA II, ARA III, ABR, ATI, AP6, MGC, AP5 . . .
For a price list, contact me at: Retro Hardware AT dave ej hitchins DOT plus DOT com

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Re: FreeFi-232 v2

Post by Elminster » Fri Aug 10, 2018 8:35 am

danielj wrote:
Thu Aug 09, 2018 8:52 am
Nope. :D
What is the dimension from the plate of the DB25 to the USB recepticle (i.e. inside mini size of a box), wifi antenna can stick out the back I guess.

The thickness and the width is going to be he size of the DB25 (maybe a bit more for header/jumper pin clearance). I could look the part up but if you are messuring the other bits you could double check that ..... please.

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danielj
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Re: FreeFi-232 v2

Post by danielj » Fri Aug 10, 2018 9:07 am

PCB dimensions were:
width : 40.69 mm
height : 53.39 mm

Not in a position to measure anything else at the mo (that's from the order, I'm at work) - the height will entirely depend on the size of pin headers you decide to use.
Last edited by danielj on Fri Aug 10, 2018 9:08 am, edited 1 time in total.

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