Here's a collection of vero (stripboard) and tagboard guitar and bass effect layouts that we have put together covering many classic and popular effects in growing numbers. Many of these have been posted on freestompboxes.org, so check that site out for great discussions on building your own effect pedals. Enjoy the builds and please also visit us on Facebook and Twitter
I think the original 3 knob Snapper had an RC4558P, but try a few different dual opamps and use the one you like best. JRC4558, TL072, LF353, LM1458 and NE5532 can all be used if you want to experiment.
I finished the pedal, but a problem. when turned on, no signal, when turned off I do have a signal. I can trace the signal path, but when entering the IC the signal is gone (after pin 3). Any suggestions? regards, Lars
Here's a question. I used to have a Red Snapper and it was great. Well, I built this, and it sounds really good, but not really the same. It's also much, much dirtier than my old 3 knob snapper. Most of the layouts/schems I've seen seem to suggest a 1 meg resistor in series between the non-inverting inputs and the voltage divider formed by those two 10 K resistors. Could that be the issue here?
That has a 1M between the first opamp and vref, and the non-inverting input of the second opamp directly connected to vref which is as I have done it in the layout (top row 3rd from left to the pink wire commoned connections which is the vref line).
I think some older Red Snappers only used a 500K gain pot and this would be less dirty. That may be worth a try to see if you get the response you want.
Hi what is the IC?
ReplyDeleteI think the original 3 knob Snapper had an RC4558P, but try a few different dual opamps and use the one you like best. JRC4558, TL072, LF353, LM1458 and NE5532 can all be used if you want to experiment.
ReplyDeleteThose 'ground' wires, do the all go to sleeve of the input jack?
ReplyDeleteYes, or any other central ground point with all the other required grounds, input and output jacks, negative of the supply, LED cathode etc.
ReplyDeleteI finished the pedal, but a problem. when turned on, no signal, when turned off I do have a signal. I can trace the signal path, but when entering the IC the signal is gone (after pin 3).
ReplyDeleteAny suggestions?
regards,
Lars
Which IC have you used and are you sure it's working? The layout is definitely verified.
ReplyDeletehi,
ReplyDeletei got it working. It seems that this pedal doesn't like boss psa adapters so I've used a batt. instead and know it's working fine!
grt. lars
Here's a question. I used to have a Red Snapper and it was great. Well, I built this, and it sounds really good, but not really the same. It's also much, much dirtier than my old 3 knob snapper. Most of the layouts/schems I've seen seem to suggest a 1 meg resistor in series between the non-inverting inputs and the voltage divider formed by those two 10 K resistors. Could that be the issue here?
ReplyDeleteI used this schematic to do the layout from:
ReplyDeletehttp://i76.photobucket.com/albums/j6/IvIark_2006/Layouts/Schematics/red_snapper.jpg
That has a 1M between the first opamp and vref, and the non-inverting input of the second opamp directly connected to vref which is as I have done it in the layout (top row 3rd from left to the pink wire commoned connections which is the vref line).
I think some older Red Snappers only used a 500K gain pot and this would be less dirty. That may be worth a try to see if you get the response you want.