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
Have you got a link to the schematic you're talking about? It was probably used for reverse polarity protection for the supply and so would be optional and wouldn't affect the sound.
ok tried my hands at this one and having an issue with it. I have my bypassed signal. When activated I get nothing. I broke out my audio probe and the last place I have a signal is at pin 3 on the IC. Now I didn't have a LM833, is it ok to substitute a TL072? Also, I did notice a faint signal on the upper leg of the 10k resistor, but fizzles out. The clipping LEDs stay lit. Ready to pull my hair out on this one.
I built this a few days ago, with no issues. Used a TL072 in place of LM833. The clipping LED's should flicker to match the guitar signal and seem to be most influenced by the Gain pot. If they are on constantly, there must be a stray signal from somewhere it shouldn't be. You may want to check wires to your pots, or run a blade down each of the non-copper grooves to be sure there are no shorts, just a thought. As for me, I am fresh out of hair after troubleshooting Echo Base, Umble and now TransMORGrifier. Good Luck.
Got it!!! I left out the 22k resistor to the left of the op amp. Doh!!! Now I'm wondering how I could really make those clipping LEDs brighter since I mounted them on the enclosure.
Hi I'm having some serious problems with this pedal! It has no sound, but when I wiggle the pcb around, sometimes there will be little snippets of sound. For example, when I pull the pcb upwards, I get a burst of distortion, then it crackles and fades away. Then there won't be any sound until I try wiggle it again to find the "sweet spot" where the distortion turns on. I also changed the pots to see if they were giving trouble. The wiring on the enclosure looks good, and I already spent many hours trying to swap parts and wires around, and even resoldered most of the pcb. What could the problem be? Help is appreciated! :( I've even checked the pcb for any unwanted bridges - none! All solder joints are good and shiny. Thanks!
I've had those symptoms on many occasions. It's always a bridge or bad joint. Bad joint is more likely suspect, as moving the boards makes a difference. +m
Thanks for the reply. I've checked my connections with the multimeter - no bridges, and bad joints were corrected. However, the voltages on my LM833 look weird, and I also replaced it.
Hello. What diodes would suggest on this one? Thanks
ReplyDeleteThey're red LEDs, one each way
ReplyDeleteThis comment has been removed by the author.
ReplyDeleteAh, that makes sense now that I actually look at the drawing! Sorry about that.
ReplyDeleteIvIark - verified this layout. Used 3mm red LED for the diodes. Think I read someone it was 5mm, but what the heck.
ReplyDeleteThanks for the great work.
Ian
Thanks for verifying mate.
ReplyDeleteHow to make him overdrive his gain is not too large
DeleteDo you mean you want less gain? If so then just reduce the value of the Gain pot
DeleteOH yeah I used a TL072 also, as I heard this was a good sub.
ReplyDeletewhat about 1n4001 as the original schematic?
ReplyDeleteHave you got a link to the schematic you're talking about? It was probably used for reverse polarity protection for the supply and so would be optional and wouldn't affect the sound.
ReplyDeletehttp://www.matsumin.net/diy/bunkai/MI_audio_dist/MI_audio_dist.jpg
ReplyDeleteyes you're right.it used for the power supply!!!!
ok tried my hands at this one and having an issue with it. I have my bypassed signal. When activated I get nothing. I broke out my audio probe and the last place I have a signal is at pin 3 on the IC. Now I didn't have a LM833, is it ok to substitute a TL072? Also, I did notice a faint signal on the upper leg of the 10k resistor, but fizzles out. The clipping LEDs stay lit. Ready to pull my hair out on this one.
ReplyDeleteI built this a few days ago, with no issues. Used a TL072 in place of LM833. The clipping LED's should flicker to match the guitar signal and seem to be most influenced by the Gain pot. If they are on constantly, there must be a stray signal from somewhere it shouldn't be. You may want to check wires to your pots, or run a blade down each of the non-copper grooves to be sure there are no shorts, just a thought. As for me, I am fresh out of hair after troubleshooting Echo Base, Umble and now TransMORGrifier. Good Luck.
ReplyDeleteGot it!!!
ReplyDeleteI left out the 22k resistor to the left of the op amp. Doh!!! Now I'm wondering how I could really make those clipping LEDs brighter since I mounted them on the enclosure.
Hello Mark could tell me the polarity of the LED d1 and d2 from top to bottom? It 's the same layout v2? thanks
ReplyDeleteThe left one is top + bottom -, right top- bottom + or vice versa
ReplyDeleteThis comment has been removed by the author.
ReplyDeleteHi, anyone has an acoustic feedback on this?
ReplyDeleteI encounter some difficulties to fix it.
Hi I'm having some serious problems with this pedal! It has no sound, but when I wiggle the pcb around, sometimes there will be little snippets of sound. For example, when I pull the pcb upwards, I get a burst of distortion, then it crackles and fades away. Then there won't be any sound until I try wiggle it again to find the "sweet spot" where the distortion turns on. I also changed the pots to see if they were giving trouble. The wiring on the enclosure looks good, and I already spent many hours trying to swap parts and wires around, and even resoldered most of the pcb. What could the problem be? Help is appreciated! :(
ReplyDeleteI've even checked the pcb for any unwanted bridges - none! All solder joints are good and shiny. Thanks!
I've had those symptoms on many occasions. It's always a bridge or bad joint. Bad joint is more likely suspect, as moving the boards makes a difference.
Delete+m
Thanks for the reply. I've checked my connections with the multimeter - no bridges, and bad joints were corrected. However, the voltages on my LM833 look weird, and I also replaced it.
ReplyDelete1: 4.77
2. 4.77
3. 2.37
4. 0.00
5. 4.49
6. 0.61
7. 1.36
8. 9.05
I also note that sometimes the LED diodes turn on and off when I test with the multimeter. Is that weird? Thanks again.
Pins 6 and 7 look a bit low, otherwise those should be ok.
DeleteI'm still saying that it must be a bad joind if the symptoms still occur.
+m
Thanks for the help. I still can't get it to work. This project's frustrating and is now dead!
DeleteOk I fixed it! Figured out a stupid mistake where I connected one of the jumpers wrongly! Argh feel so dumb...
DeleteHi check out my demo of this pedal here https://www.youtube.com/watch?v=tdONTd2HCDc
ReplyDeleteHow to make him overdrive his gain is not too large
ReplyDelete