|HOME| |DIY FAQ| |GEO FAQ| |Debugging Page| |Links| |Schematics| |Wiki| |Layouts Gallery| |STORE|
|AMPAGE| |GEOFEX| |AMZ|

Welcome, Guest. Please login or register.
Did you miss your activation email?
December 22, 2014, 01:28:16 PM
978156 Posts in 104093 Topics by 33412 Members
Latest Member: rkscott7
Home Help Login Register
DIYstompboxes.com  |  DIY Stompboxes  |  Digital & DSP  |  Spin semiconductor fv-1 0 Members and 1 Guest are viewing this topic. « previous next »
Pages: 1 2 3 4 [5] Go Down Print
Author Topic: Spin semiconductor fv-1  (Read 29179 times)
MetalGuy
Posts: 421


Re: Spin semiconductor fv-1
« Reply #80 on: April 23, 2008, 03:47:18 PM »

Quote
Sean, did you see my layout yet, should help getting started with this chip as a pedal.

Good job on that one. If I remember this is the encoder that goes with it:

http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=GH3074-ND

http://www.alliedelec.com/Search/ProductDetail.asp?SKU=948-0431&SEARCH=&MPN=25LB22%2DH&DESC=25LB22%2DH&R=948%2D0431&sid=480E7C0046DFE17F
Logged
SeanCostello
Posts: 327


Re: Spin semiconductor fv-1
« Reply #81 on: April 23, 2008, 07:28:56 PM »

Sean, did you see my layout yet, should help getting started with this chip as a pedal.

COOL! Are you going to have boards available for this project? I will try making one of these next week.

Is there any room on the board for output buffers? Or, do you think that a dual-ganged pot could mix input and output in the analog realm without too much loss?

Again, very exciting!

Sean
Logged
Fp-www.Tonepad.com
Posts: 1130

Francisco Peņa


WWW
Re: Spin semiconductor fv-1
« Reply #82 on: April 30, 2008, 03:54:27 PM »

i'd definitely try the dual ganged pot mix.

I didn't want to add too much to it because there's always going to be a long list of features to add, i kept it really simple. Besides, there's two buffers on the board, you can use one of them for input an the other one for output. For mono use, the inputs should be tied together, which frees that extra buffer for output.
Logged

www.tonepad.com : Effect PCB Layout artwork classics and originals : www.tonepad.com
MarcoMike
Posts: 593


Marco M, Italy


Re: Spin semiconductor fv-1
« Reply #83 on: May 05, 2008, 11:49:31 AM »

Hi guys! I'm a total newbie about digital stuff, but I saw this new project at Francisco's and thought this may be my first digital experience...

reading the datasheet I couldn't understand how you select the programs... it seems pins 16,17,18 are the ones... but on the proto-board it looks like there is a sort of pot to select the program... well, how does it work?!?  Wink

thank you!
Logged

Only those who attempt the absurd will achieve the impossible.
octfrank
Posts: 120


WWW
Re: Spin semiconductor fv-1
« Reply #84 on: May 07, 2008, 11:20:02 AM »

The device on the dev board for program selection is a rotary encoder, not a pot. It is a digital output device so it connects to the program selection pins to drive them high/low to select the program.
Logged

Frank Thomson
Experimental Noize
Fp-www.Tonepad.com
Posts: 1130

Francisco Peņa


WWW
Re: Spin semiconductor fv-1
« Reply #85 on: May 18, 2008, 02:47:37 AM »

or you can use spst switches instead, even jumpers would work.

Look at the datasheet for program assignments.
Logged

www.tonepad.com : Effect PCB Layout artwork classics and originals : www.tonepad.com
MetalGuy
Posts: 421


Re: Spin semiconductor fv-1
« Reply #86 on: May 18, 2008, 05:23:26 AM »

External free programs found on Spin's website are much more interesting by the way.
The other way to select programs is to use an ordinary rotary encoder in combination with a small MCU /like PIC16F629 for example/.
Logged
MarcoMike
Posts: 593


Marco M, Italy


Re: Spin semiconductor fv-1
« Reply #87 on: May 19, 2008, 12:39:09 AM »

Thank you guys! I think the three swithes array suits me better.. Roll Eyes

now it seems my problem is to find the chip  Tongue
Logged

Only those who attempt the absurd will achieve the impossible.
puretube
Posts: 7208


but, err, I`m not really here...


WWW
Re: Spin semiconductor fv-1
« Reply #88 on: May 19, 2008, 09:47:37 AM »

US: small bear
EU: pro fusion

up to you, to check the shipping costs... (  icon_wink )
Logged

MarcoMike
Posts: 593


Marco M, Italy


Re: Spin semiconductor fv-1
« Reply #89 on: May 20, 2008, 01:32:01 AM »

It's quite funny... shipping costs within europe are double the price of the chip... Sad
Logged

Only those who attempt the absurd will achieve the impossible.
Fp-www.Tonepad.com
Posts: 1130

Francisco Peņa


WWW
Re: Spin semiconductor fv-1
« Reply #90 on: May 20, 2008, 05:59:48 PM »

Get some more stuff, that way the chip/ship ratio will improve. icon_wink Tongue
Logged

www.tonepad.com : Effect PCB Layout artwork classics and originals : www.tonepad.com
amz-fx
Posts: 1101


Jack


WWW
Re: Spin semiconductor fv-1
« Reply #91 on: June 24, 2008, 06:31:09 AM »

I posted a short mod on the Spin forum (and in my blog) on how to double the amount of user-programmable memory for the FV-1.

Enjoy!

-Jack

Logged

scratch
Posts: 357


Re: Spin semiconductor fv-1
« Reply #92 on: June 25, 2008, 05:28:53 PM »

I was thinking of replacing the pots with 8-bit DACs, driven by up/down binary counters, each program would have it's own set of counters (with CMOS I might even be able to save the counter info with battery backup) ... I've got a whole tube of 7-segment displays, I figure I could use these to monitor the outputs of the counters ...

BUT, I can't find a display driver that will do hex! The closest I've found are displays made by Avago with built-in decode/driver, but at $23.00(ish) per digit, not going to happen.

Anybody ever come across a solution other than Micro-controllers ?

Thanks,
Logged

Denis,
Nothing witty yet ...
octfrank
Posts: 120


WWW
Re: Spin semiconductor fv-1
« Reply #93 on: June 25, 2008, 07:54:25 PM »

Solutions off the top of my head:

DM9368 from Fairchild if you can find any
Programmable logic (i.e 22V10, cheap FPGA)
EEPROM (inputs to address lines, outputs to 7-segment)

Frank
OCT Distribution
Logged

Frank Thomson
Experimental Noize
scratch
Posts: 357


Re: Spin semiconductor fv-1
« Reply #94 on: June 26, 2008, 07:44:13 AM »

Octfrank,

been unable to find the DM9368 (would have been the best solution, and surprising that it didn't catch on!)

the 22V10/CPLD is cheaper, but I then have to invest in a programmer, and some code generation.

EEPROM, more expensive, same footprint as 22v10, but way easier to implement, I might just pursue this avenue,

thanks for the ideas!
Logged

Denis,
Nothing witty yet ...
amz-fx
Posts: 1101


Jack


WWW
Re: Spin semiconductor fv-1
« Reply #95 on: September 16, 2008, 11:21:00 AM »

Does anyone know of a commercially available box using the FV-1 chip?  I want to buy one for experimentation purposes.

Thanks, Jack

Logged

tiges_ tendres
Posts: 1675

Steven M


Re: Spin semiconductor fv-1
« Reply #96 on: September 16, 2008, 11:44:21 AM »

Does anyone know of a commercially available box using the FV-1 chip?  I want to buy one for experimentation purposes.

Thanks, Jack



I think the EHX Holy Stain uses one.
Logged

Try a little tenderness.
amz-fx
Posts: 1101


Jack


WWW
Re: Spin semiconductor fv-1
« Reply #97 on: September 16, 2008, 07:12:22 PM »

I think the EHX Holy Stain uses one.

Thanks. Anyone here have one that can confirm that?

regards, Jack
Logged

eddieod
Posts: 6


Re: Spin semiconductor fv-1
« Reply #98 on: September 17, 2008, 06:39:14 AM »

Hi all,

I've got two fv-1's but I just can't get them to work! Power supply is ok, everything is connected as it's supposed to be but no sound coming out of it....any ideas? Are these devices ultra sensitive to static and/or heat during soldering?

Any help will very much be appreciated...

Edwin
Logged
octfrank
Posts: 120


WWW
Re: Spin semiconductor fv-1
« Reply #99 on: September 17, 2008, 11:03:08 AM »

Edwin,

Email or post on the Spin website forum a full description and pdfs of the schematic and board layout.
Logged

Frank Thomson
Experimental Noize
Pages: 1 2 3 4 [5] Go Up Print 
« previous next »
Jump to: