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Did anyone already made a vero layout of the Crash Sync by John Holllis (schematic: http://www.hollis.co.uk/john/crashsync.jpg)
It seems like a effect worthwhile to build. Or isn't it?
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This post was updated on Aug 16, 2016; 5:12pm.
Hello,
this is my first message. I'd like to thank you all for the all your work and try to give something back. This is my attempt for the layout requested. I hope it is good enough. It is not verified. EDIT: Layout updated to match Ciaran correction. Verified by okwilliam. ![]() |
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I don't know if your layout is correct Pivetta, but that is a nice looking board.
Well done on a great first effort, and thanks for posting it. |
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Wow, that's great!! Thanks. I will have a try to build is as soon as I can in the next few days. Off course I'll let you know if it's working or not. :)
Awesome!!!
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In reply to this post by Pivetta
Hey, I build it today, but it's not working :(
I checked everything multiple times but it seems my build is similar to your layout. The 555 timer frequencies does work but I dont have any guitar signal output. i tried a few 4558/tl072, same result. I will have an attempt on tracing the signal, but any help/further development is helpfull! Let me know if you found something in the layout as well! :) thanks!!
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This post was updated on Aug 15, 2016; 7:33pm.
I'm afraid the layout has a few errors. Pins 2 and 3 of IC 1 are mixed up, Vref pair isn't actually getting 9V, the level pot has issues. It'll take a fair bit of shuffling of components to get it right.
I'll jig the layout tonight to hopefully get you sorted while Pivetta works on correcting his. EDIT: I was wrong about Vref sorry. Looking at the wrong 56K EDIT EDIT: I just seen that this was your first ever layout Pivetta! Excellent effort. Great use of space. |
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Do some magic! :)
Mine is pretty tragic ;P But thanks already, I hope you can get me and Pivetta back on the tracks!
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This post was updated on Aug 16, 2016; 12:19pm.
CONTENTS DELETED
The author has deleted this message.
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I'm getting nuts! I changed everything to your layout. But still only the frequency signal gets through. No guitar signal output. The 555 and 4558 both work. But somehow they don't mix. Am I doing something wrong somewhere? I'll try to do my best and trace the signal with the original schematic. But I'm not that good in it :P
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Just went over my layout again. It matches the schematic so either a build error or schematic error. Your guitar exits pin 7 of IC 1, thru a 10K to pin 4 of IC 2. Try probing here at least to check it it's getting this far
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In reply to this post by okwilliam
Post some hi res pics if it helps too
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The guitar signal exits pin 7 / IC1 to pin4 / IC2. But pin 4/IC2 itself gives no guitar signal (but a very very low volume frequency tone). I will post a pic rightaway :) Op di 16 aug. 2016 om 10:16 schreef Ciaran Haslett [via Guitar FX Layouts] <[hidden email]>: Post some hi res pics if it helps too -- Groet, William
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![]() ![]() the solder side is a bit messy due to the re-arranging :)
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I'm sorry to hear about your trouble. I'll try to build it and see if it works.
To Ciaran: Thank you for spotting my error. Maybe a dumb question, but I can't get why you add a 10uF cap between G and H rows. |
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Copy/Paste error sorry. Its not needed.
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In reply to this post by okwilliam
Is IC2 pin 4 soldered? Looks lie a hole with no solder where it should be.
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ehm.... yes. that is unsoldered.....
I wish I could have fresh eyes all the time :) It's still a bit sputtery (is that an English word?), so that might be the effect. Or maybe I should try a lot of different IC's for both to see if that will get it better. But it works! Thanks so much Actually, I already got some cool sounds of it!! #happy :) More work and play!!
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Happy days lad. It's easy done and fresh eyes certainly helps. I'm not familiar enough with the 555 or this circuit to offer any tweaking advice sorry.
I'll remove my layout tonight. Again...all credit to Pivetta Ciaran |
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Many Thanks for both of you!!
This one should be on the main site as well Pivetta!! :) I played and tried some modding. I think I will add a on/off/on switch to two points in the circuit. Which gives it some nasty, suboctave tones and just some more tone-variation. The volume is very interactive with the frequency pot. It isn't a real volume in my opinion. Below 2 o'clock setting there's no volume. And above it's just 'on'. But varying it together with the frequency pot gets a wider range of tones. Or noisy tones I'd better say :) Once I finished it properly I will make a video demo. Maybe I'll even box it up very pretty :) Thanks again!
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I'm glad it finaly works. I've updated the layout.
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