tag:blogger.com,1999:blog-5481402030233340127.post8656028719426803647..comments2024-03-28T17:24:07.520-04:00Comments on Perf and PCB Effects Layouts: Earthquaker Devices The Depthsdtgehringhttp://www.blogger.com/profile/09555201436004501222noreply@blogger.comBlogger109125tag:blogger.com,1999:blog-5481402030233340127.post-41792464598099126652023-12-20T15:19:31.664-05:002023-12-20T15:19:31.664-05:00They need to be matched?They need to be matched?DChttps://www.blogger.com/profile/17761134967604348257noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-63698597395546931872023-04-28T22:33:26.886-04:002023-04-28T22:33:26.886-04:00working! very nice vibe. I use: in Q1 bc548, in Q2...working! very nice vibe. I use: in Q1 bc548, in Q2 bc558, the 2 inverted. R base of Q2 replace by 150k and add R of 3.9k in current pin 3. nice projectnic_pachecohttps://www.blogger.com/profile/04102172930210043536noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-36272323685112403182023-01-13T01:57:31.077-05:002023-01-13T01:57:31.077-05:00Just built the depths! Awesome sounds and very vib...Just built the depths! Awesome sounds and very vibery!<br />Here is my solution to unfreeze the lfo: i used mpsa18 with 600 hfe, change the 47k res collector to base of q2 with 150 k res and lastly solder a 3.3k on lug 3 intensity knob. Hope this might guyz.Jun dhttps://www.blogger.com/profile/07905810487041216546noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-28805820576834107892022-09-26T03:56:18.589-04:002022-09-26T03:56:18.589-04:00Hi, also had problem with oscillation stopping - I...Hi, also had problem with oscillation stopping - I put trimpod instead of 47K resistor between B and C of Q2(mpsa18 in my case) aaand problem is gone ;) bigger resistor should do the job too.<br /><br />Voice problem in my case was wrong LED. I end up with 3mm green ultrabright. <br /><br />I also used 15nF instead of 150nF. <br />MRKhttps://www.blogger.com/profile/08479896187556957971noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-6014342855269598762022-06-02T12:01:04.131-04:002022-06-02T12:01:04.131-04:00Hi! today i came back to this project. I used brig...Hi! today i came back to this project. I used bright green led, mpsa 18. So, if you want to make it working good, you should to pick up resistor 47k between base-collector Q2. After that you will get normal working oscillator, rate & voice pots. In my case i took resistor 150k. Throb.. just adding more lows. ZZOYDhttps://www.blogger.com/profile/17557567967251809829noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-91464078972222865052022-05-06T12:54:07.030-04:002022-05-06T12:54:07.030-04:00Tengo un problema, cuando enciendo el pedal, la se...Tengo un problema, cuando enciendo el pedal, la señal sale sumamente distorsionada, casi como un fuzz. Tiene el efecto incorporado pero sale con este sonido roto. El potenciometro de threb no hace absolutamente nada como puedo solucionar lo de la señal distorsionada?Juan cruzhttps://www.blogger.com/profile/08936315274719916085noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-40289033999300318152021-12-05T19:30:02.999-05:002021-12-05T19:30:02.999-05:00i succeeded Use the device according to the schema...i succeeded Use the device according to the schematic values and it works. Thanks from Thailand.Anonymoushttps://www.blogger.com/profile/00818401956600191911noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-20004080176397878652021-09-16T06:25:49.735-04:002021-09-16T06:25:49.735-04:00What did u use finally? 15nf or 150nf? What diffre...What did u use finally? 15nf or 150nf? What diffrences were between themZaraki1337https://www.blogger.com/profile/04815656896624384794noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-53541911415414192842021-09-15T02:42:59.200-04:002021-09-15T02:42:59.200-04:00Sounds great, but I have a POP problem. I tried ad...Sounds great, but I have a POP problem. I tried adding 1M resistor to the input and output jacks between tip and ground, but it didn't helpS4ezyhttps://www.blogger.com/profile/04139613760149078693noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-18819262056966848572021-09-09T13:16:50.215-04:002021-09-09T13:16:50.215-04:00I breadboarded it from the schematics, but found t...I breadboarded it from the schematics, but found that I needed to move the 15K resistor in the LFO part to come between the 9V input and the voice potentiometer. Otherwise too much power came from the 9V to the voice pot and the LED was constantly on since the LFO voltage was lower. Move the 15K resistor solved the issue. Have you had similar issues? I have most likely made a mistake elsewhere, though I cannot see - staring myself blind.Mohvivhttps://www.blogger.com/profile/11364375989023680570noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-4364678922089123072021-03-07T14:39:31.258-05:002021-03-07T14:39:31.258-05:00Hi!
Could share the schematic circuit, please?Hi!<br />Could share the schematic circuit, please?Camilahttps://www.blogger.com/profile/08089806829659899645noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-91984074739120141382021-03-04T10:51:56.152-05:002021-03-04T10:51:56.152-05:00I'm very much satisfied with the result and re...I'm very much satisfied with the result and really enjoying this pedal... this is my 4th built from Effects Layout (TS808 / Green Russian / Blues Driver / The Depths ) I'm working now on my 5th which is Sovereign ... thank you so much for sharing all of your works Effects Layout.... from the Philippines :-)Anonymoushttps://www.blogger.com/profile/06168208714301661244noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-47733484107669251642021-02-21T21:26:15.892-05:002021-02-21T21:26:15.892-05:00I got it working! Thanks for the reply. I had to u...I got it working! Thanks for the reply. I had to use a different tl072 and flip it around. I didn't notice the orientation was different initially. Newbie mistake!heartbenhttps://www.blogger.com/profile/18390869775596309482noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-12422583705257717792021-02-19T08:40:52.139-05:002021-02-19T08:40:52.139-05:00testa com outro tl072. caso não funcione, reveja t...testa com outro tl072. caso não funcione, reveja todo o circuito e faça uma limpeza na placa! Unknownhttps://www.blogger.com/profile/07683124846166521841noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-31427963861722913142021-02-17T19:51:21.123-05:002021-02-17T19:51:21.123-05:00I gave this one a go and really took my time. Unfo...I gave this one a go and really took my time. Unfortunately it seems like the tl072 on the right side is overheating for some reason. I can’t spot anything wrong and I’m not sure what causes it. I had this happen to another pedal too that is currently in the “figure it out later” bin. Any ideas for me? Would a short cause this type of issue? heartbenhttps://www.blogger.com/profile/18390869775596309482noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-67441365508856970392021-02-09T10:41:22.335-05:002021-02-09T10:41:22.335-05:00Hi! can I use separate LED for each LDR?Hi! can I use separate LED for each LDR?Anonymoushttps://www.blogger.com/profile/06168208714301661244noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-82809953153802350222020-10-21T03:38:37.698-04:002020-10-21T03:38:37.698-04:00I’ve wanted to build this one for some time. I cou...I’ve wanted to build this one for some time. I couldn’t be happier with the result!!! Thank you!!!!!Sisyphushttps://www.blogger.com/profile/18267421169189509463noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-46859873708795596212020-08-09T12:12:57.855-04:002020-08-09T12:12:57.855-04:00I got strange noise with mpsa18 so I changed for B...I got strange noise with mpsa18 so I changed for BC549B (inverted pinout)hfe around 400. 15nf cap instead 150nf. bright white led 3mm. Works nice!pabloyorkehttps://www.blogger.com/profile/08114508507029781272noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-54923461518304025752020-08-08T05:44:41.761-04:002020-08-08T05:44:41.761-04:006k8 from voice 3 to gnd? Didn’t help, still stops ...6k8 from voice 3 to gnd? Didn’t help, still stops at slow speedsLeehttps://www.blogger.com/profile/03170439822883504372noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-81971406317995592262020-08-08T05:42:45.069-04:002020-08-08T05:42:45.069-04:00I’ve tried every suggestion here, nothing fixes it...I’ve tried every suggestion here, nothing fixes it for meLeehttps://www.blogger.com/profile/03170439822883504372noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-48656123693225311472020-07-06T05:14:12.121-04:002020-07-06T05:14:12.121-04:00I have a problem with this build: the output volum...I have a problem with this build: the output volume is very high and I have to turn the volume knob back to approx 20 percent to get unity volume. What may cause this high volume? The tl072 output stage, or too bright led, or the high gain of the mpsa18? Can I reduce the gain with the emitter resistor? Hans Hhttps://www.blogger.com/profile/05326283979518568586noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-31093174039756121672020-05-07T17:45:02.461-04:002020-05-07T17:45:02.461-04:00Agreed, the sound is coming out perfectly fine and...Agreed, the sound is coming out perfectly fine and that area of the board had already caught my attention. Reading voltages around, I noticed that there's zero volts in that segment between the three 1uF caps. Is that normal??<br />What's bugging me is that I cannot find any discontinuity or shorts there.<br />Worth noting is that I replaced the MPSA18 with 2N5088's, but I don't think it would cause this.<br />Any ideas?Edelberto.Netohttps://www.blogger.com/profile/15863911329981689242noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-2965834586024153852020-05-07T17:44:11.833-04:002020-05-07T17:44:11.833-04:00This comment has been removed by the author.Edelberto.Netohttps://www.blogger.com/profile/15863911329981689242noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-32920655660625041682020-05-06T21:48:54.046-04:002020-05-06T21:48:54.046-04:00Sounds like your LFO is locking up. The LFO is wha...Sounds like your LFO is locking up. The LFO is what makes the LED pulse. Here's the schematic for reference:<br /><br />https://i.imgur.com/8R4keTO.png<br /><br />The LFO portion of the circuit is the top 3rd of the circuit board, and the portion of the schematic not directly tied to the audio path (which is all opamps, while the LFO is transistor-based).Effects Layoutshttps://www.blogger.com/profile/11341183658959824998noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-3275229341533870742020-05-06T21:11:49.087-04:002020-05-06T21:11:49.087-04:00My build only worked briefly and then stopped vibr...My build only worked briefly and then stopped vibrating again!! The internal LED stay lit all the time the power is connected, even with the effect bypassed (don't know if it is supposed to be like that), and most important, it doesn't oscillate! Except for two times when i'm fiddling with the knobs, and one brief moment while testing with the guitar plugged. I don't know what happened, just playing with the knobs (I believe the level or the throb at the time) and then it worked. The LED started blinking and even being responsive to the controls, so I closed the lid and went to the amp to test it, but there it won't work again, except for a second or so.<br />What exactly makes the LED blink???? Where should I check?Edelberto.Netohttps://www.blogger.com/profile/15863911329981689242noreply@blogger.com