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rosch
Joined: Oct 03, 2009 Posts: 164 Location: germany
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Posted: Sun Jul 03, 2011 9:24 am Post subject:
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that's f*%&§ng cheap!!
could be i've looked for the wrong one, but at Farnell i found them for about 18€!
cool! |
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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Posted: Sun Jul 03, 2011 1:39 pm Post subject:
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i know, however, i won't be able to commit on the price before i payed all bills... nevertheless, it will be way below the farnell price. _________________
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source |
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adambee7
Joined: Apr 04, 2009 Posts: 420 Location: united kingdom
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Posted: Mon Jul 04, 2011 1:13 pm Post subject:
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Farnell can be quite expensive for parts. |
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arrmcbain
Joined: Dec 13, 2010 Posts: 13 Location: Adelaide, Australia
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Posted: Sat Jul 09, 2011 3:59 am Post subject:
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fonik wrote: | so far only 80% ordered a UART along with the PCB. check your needs, please. |
Yes I would like a UART with my PCB, thanks. |
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tehskull
Joined: May 07, 2011 Posts: 23 Location: Kentucky
Audio files: 1
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Posted: Mon Jul 11, 2011 7:54 pm Post subject:
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I am in for one pcb and uart. |
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jwilsey
Joined: Feb 24, 2009 Posts: 31 Location: Taichung City
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Posted: Sun Jul 17, 2011 10:55 pm Post subject:
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I would like 3 PCB's and 3 UARTs
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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Posted: Sun Jul 17, 2011 11:28 pm Post subject:
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jwilsey wrote: | I would like 3 PCB's and 3 UARTs
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the cutoff date for pre-orders has been on 4th of july. i will put you on a waiting list, though. _________________
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source |
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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Posted: Sat Jul 23, 2011 4:07 am Post subject:
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PCBs and UARTs are in, and i can confirm the pricing.
Dave will do a testbuild ASAP, and then we are ready for delivery... _________________
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source |
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brother303
Joined: Nov 02, 2010 Posts: 139 Location: ruhr-area/germany
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Posted: Sun Jul 24, 2011 2:39 pm Post subject:
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Hi,
fonik wrote: | PCBs and UARTs are in, and i can confirm the pricing.
Dave will do a testbuild ASAP, and then we are ready for delivery... |
yay,sounds good!
_________________ Best regards
Greg |
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diablojoy
Joined: Sep 07, 2008 Posts: 809 Location: melbourne australia
Audio files: 11
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Posted: Sun Jul 24, 2011 4:29 pm Post subject:
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orsm cant wait
so approx $25 USD per board + UART ? nice
will have to build one asap as a high priority
but the others will have to join my stupidly large backlog
as i am trying to concentrate on my first true case with a proper power supply to be completed [its bent twisted and lumpy and taken over a year to sand already, but its getting there slowly. was very nearly a bridge too far ]
my temporary test case is full at the moment so will have to make some room in that for a little while more at least i think. |
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Dave Kendall
Joined: May 26, 2007 Posts: 421 Location: England
Audio files: 3
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philpeery
Joined: Nov 08, 2006 Posts: 137 Location: new jersey, usa
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Posted: Sat Jul 30, 2011 12:10 pm Post subject:
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How did I miss this one!!! If you are still taking orders, put me in for 1 + the UART!
Looks like another awesome project from fONIK and Dave!!!
Regards,
Phil |
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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Posted: Sat Jul 30, 2011 2:26 pm Post subject:
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start a waiting list and will later on re-order PCBs and UARTs as needed... _________________
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source |
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marvkaye
Joined: Mar 14, 2011 Posts: 225 Location: Fla
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Posted: Mon Aug 01, 2011 6:20 pm Post subject:
BOM questions |
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Hi Matthias...
While going through the BOM you posted earlier I noticed that the ICs shown appear to be from two different families... you have some 74HC chips and then call out a couple 4000 series CMOS (4017 & 4538). Am I assuming correctly that the 74HC's are 5v chips and the other two are higher voltage parts (ie, CD4017, HEF4538 or CD14538?) with max ratings to 18v or something like that?
My other question is about the crystal... I found this clock oscillator http://www.ecsxtal.com/store/pdf/ecs-100x.pdf (DIL14/4, 4MHz, 5v) and am wondering if it's the correct part? The Digikey part # is X942-ND and at Mouser it's # 520-TCF400-X.. Just trying to get ready to buy more stuff....
<marv> |
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Dave Kendall
Joined: May 26, 2007 Posts: 421 Location: England
Audio files: 3
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Posted: Tue Aug 02, 2011 11:49 pm Post subject:
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Hi.
The PCB can use either 74HC4538 and 74HC4017, or regular 4017 and 4538, which the prototypes were tested with. If using a 74HC4538, R5 will need to be 39K, rather than 27K for a 4538. U1 was also tested with a regular 4040 and worked OK. This was done just to give people more options where possible, if they couldn't source a particular part. (I found the 74HC4538 harder to find from my regular suppliers than a regular 4538)
The 74HC237 has no direct CMOS 4xxx equivalent, and I would not be tempted to use a 40106 in place of the HC14, as it is part of a timing-critical circuit. It *may* work, but I haven't tried it - anyway, HC14s are common and cheap enough...........
Most of the circuit runs on +5V, except the opamp out buffers (U9, U10 and U11), so 74HC parts are fine throughout.
The 14-pin DIL Xtal Osc looks like the right one. An 8-pin XTAL osc will also work, as the PCB layout can take either type.
Am working on a build and docs today - stay tuned......
cheers,
Dave
(edited for spelling) _________________ "Everything in moderation, including moderation" |
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Dave Kendall
Joined: May 26, 2007 Posts: 421 Location: England
Audio files: 3
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Posted: Sat Aug 06, 2011 2:09 am Post subject:
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Hi Guys.
Some domestic problems this end - I've had to put testing the MKII V2 PCB on hold until next week, probably tuesday. Sorry for the hitch. As you all know sometimes s**t happens.....
cheers,
Dave _________________ "Everything in moderation, including moderation" |
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Cynosure
Site Admin
Joined: Dec 11, 2010 Posts: 966 Location: Toronto, Ontario - Canada
Audio files: 82
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Posted: Sat Aug 06, 2011 3:15 pm Post subject:
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I'm still not even close to finishing the synth that I hope to sync with this due to "domestic problems" (aka wife) so don't worry about it. I'm sure we all have enough other projects to keep us busy for a few more days. |
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marvkaye
Joined: Mar 14, 2011 Posts: 225 Location: Fla
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Posted: Sat Aug 06, 2011 4:50 pm Post subject:
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Hi Dave,
Thanks for the clarification on the part numbers. I'd like to say everything would probably be clearer once I see the schematic, but I'd have about a 50/50 chance of lying to you.
Anyway, I've got most of the parts not in my inventory awaiting order in a Mouser project (what a cool service that is), so whenever the docs are ready I'll commit with $$$.
I hope the domestic issues sort themselves out for you guys shortly... I know how stressful that can be (regardless of the reason) & hope you achieve happy resolutions.
<marv> |
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Dave Kendall
Joined: May 26, 2007 Posts: 421 Location: England
Audio files: 3
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marvkaye
Joined: Mar 14, 2011 Posts: 225 Location: Fla
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Posted: Tue Aug 09, 2011 10:34 am Post subject:
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I hate to be a PITA, but what is the spec for RN1? Any search I do that includes RN08 that yields a resistor network shows one with 8 pins and 7 resistors... in looking at the PCB and Dave's partially populated photos, I see 9 holes and a 9-pin network on Dave's card. (I see Haje Electronics in the Nederlands shows RN08 networks, but they're 8 pin.... There's got to be a US source, I'm sure....) The quest goes on....
<marv> |
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Dave Kendall
Joined: May 26, 2007 Posts: 421 Location: England
Audio files: 3
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Dave Kendall
Joined: May 26, 2007 Posts: 421 Location: England
Audio files: 3
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marvkaye
Joined: Mar 14, 2011 Posts: 225 Location: Fla
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Posted: Tue Aug 09, 2011 11:11 am Post subject:
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Phew, that was quick... lemme catch my breath....
Thanks, Dave, it's all very clear now. I like your "bodged" up network, gets the job done is the main thing. Found them at Mouser right off. Thanks for your support, you get my vote.
<marv> |
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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Posted: Mon Aug 15, 2011 3:39 am Post subject:
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marvkaye wrote: | I hate to be a PITA, but what is the spec for RN1? Any search I do that includes RN08 that yields a resistor network shows one with 8 pins and 7 resistors... in looking at the PCB and Dave's partially populated photos, I see 9 holes and a 9-pin network on Dave's card. (I see Haje Electronics in the Nederlands shows RN08 networks, but they're 8 pin.... There's got to be a US source, I'm sure....) The quest goes on....
<marv> |
i see. sorry for the confusion.
the preliminary BOM you refer to shows the device name RN08, which is an internal label from the CAD software. the package is indeed RN-9. _________________
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source |
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tommi
Joined: Dec 05, 2007 Posts: 247 Location: Italy
Audio files: 3
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Posted: Tue Aug 16, 2011 8:55 am Post subject:
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I just seen Dave's picture and description of the crystal oscillator..
I thought it was a classic 2pin type, but it seems to be something different.
Can someone explain wich kind of crystal is that?
Thanks. _________________ http://soundcloud.com/mister-vommi
http://tideofsound.net |
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