audioguru Posted March 9, 2006 Report Share Posted March 9, 2006 The pcb and the parts shown on it are correct, but I think the LED is shown backwards.The schematic and parts list are incorrect.Use a preamp that has a low output impedance. Quote Link to comment Share on other sites More sharing options...
frt Posted March 13, 2006 Report Share Posted March 13, 2006 thnk u very much ;D thanksssssss more power ;) Quote Link to comment Share on other sites More sharing options...
balong Posted March 13, 2006 Report Share Posted March 13, 2006 hi!! i'm planing to replace the tl071 with jrc4559 is that ok!! i need your opinion. can you help me!? thanks. Quote Link to comment Share on other sites More sharing options...
audioguru Posted March 13, 2006 Report Share Posted March 13, 2006 i'm planing to replace the tl071 with jrc4559 is that ok!! i need your opinion. can you help me!? The circuit doesn't use a single TL071 opamp. It uses a dual opamp like a TL072. The dual jrc4559 will also work fine in the circuit. Quote Link to comment Share on other sites More sharing options...
frt Posted March 28, 2006 Report Share Posted March 28, 2006 idont under stand the parts indicated in the pcb iwant to know the values of the resitors coz i saw that ther is a 39 p two resitor ' 100 ' between the ic make it clear for meplsss Quote Link to comment Share on other sites More sharing options...
Staigen Posted March 28, 2006 Report Share Posted March 28, 2006 Hi frtidont under stand the parts indicated in the pcb iwant to know the values of the resitors coz i saw that ther is Quote Link to comment Share on other sites More sharing options...
Staigen Posted March 30, 2006 Report Share Posted March 30, 2006 Hi frtIs it clearer now, but the 100n caps seems to be ceramic ones, too//Staigen Quote Link to comment Share on other sites More sharing options...
audioguru Posted March 30, 2006 Report Share Posted March 30, 2006 can u rename the parts... put their spesific values... Quote Link to comment Share on other sites More sharing options...
gogo2520 Posted March 30, 2006 Report Share Posted March 30, 2006 Nice Job Staigen Thank You gogo Quote Link to comment Share on other sites More sharing options...
audioguru Posted March 30, 2006 Report Share Posted March 30, 2006 The supply bypass caps are ceramic.The four tuning caps are 5% metallized plastic film. They are rectangular in the photo. Quote Link to comment Share on other sites More sharing options...
frt Posted April 3, 2006 Report Share Posted April 3, 2006 can u do it in all parts exemp from volume control pls Quote Link to comment Share on other sites More sharing options...
Staigen Posted April 3, 2006 Report Share Posted April 3, 2006 Hi frtWhat do you mean? Why dont you read some tutorials about electronics, thenyou will know how a cap looks like, hopefully!//Staigen Quote Link to comment Share on other sites More sharing options...
frt Posted April 6, 2006 Report Share Posted April 6, 2006 i mean u will also put an arrow on the other parts that u dint make u already know that it is unclear to me last april 1 i send that pcb copy in some electronic store here in the phillipines but un fortunately they do not knowthe values of the parts that why i beg u for ur help Quote Link to comment Share on other sites More sharing options...
teamburger Posted April 7, 2006 Report Share Posted April 7, 2006 ??? with owner,thank's be4, friend i need you are help pliisI need circuit and schematic for control with radio (like a remote control, but with a long distance), Iam very need this informationthank's for tou are helptimbar imam p. Quote Link to comment Share on other sites More sharing options...
audioguru Posted April 7, 2006 Report Share Posted April 7, 2006 Frt,This project's schematic, its parts list, its pcb layout and its photo don't agree with each other. It would be a fairly big job to sort it all out. We don't even know if it works.Similar projects are on the web and are presented more clearly and are fully completed. Quote Link to comment Share on other sites More sharing options...
MP Posted April 8, 2006 Report Share Posted April 8, 2006 frt,I suggest that you contact the author of the project at his email address:[email protected]He will be able to tell you about his tests of the project and also will be able to give you details of the parts that he used for the project. It seems that this is the basis of your questions.MP Quote Link to comment Share on other sites More sharing options...
balong Posted April 12, 2006 Report Share Posted April 12, 2006 hellow!!!! experimenting on your projects can really help!!! and it will increase your knowlege about electronics!! and also dont forget to put some personaltouch in your projects. because as far as i know also in my opinion electronicsis modern art. ok !!! Quote Link to comment Share on other sites More sharing options...
MP Posted April 12, 2006 Report Share Posted April 12, 2006 I agree belong, however, it can also cause your project to go up in smoke if you experiment the wrong thing. As staigen pointed out, it is helpful to find tutorials and to read some publications before jumping into something you are totally clueless about. pfoooof!!!!If you let the smoke out of the circuit, it will not work :)MP Quote Link to comment Share on other sites More sharing options...
zak4000 Posted May 13, 2006 Report Share Posted May 13, 2006 HI!!The 22k pot. on the PCB is wired up differently than the schematic!?Wich ones right? ??? Quote Link to comment Share on other sites More sharing options...
audioguru Posted May 13, 2006 Report Share Posted May 13, 2006 HI!!The 22k pot. on the PCB is wired up differently than the schematic!?Wich ones right? ???Hi Zak,Welcome to our forum. ;DThe 22k pot is a dual pot. Maybe you found another problem with this project.I said it before about it: "This project's schematic, its parts list, its pcb layout and its photo don't agree with each other." Quote Link to comment Share on other sites More sharing options...
zak4000 Posted April 1, 2007 Report Share Posted April 1, 2007 havnt been here for ages :oanyway, ive finished this project (almost) lol, and i dont hav a 39pF cap so i used a 56pF metallized caps for now, works ok... you might need a preamp on the output as wellyou only need 4 100nF ceramic capswhat are the 180nF and 100nF metallized caps for?you dont need high voltage caps as the project only needs 2x 9v (or about that) batteries to run Quote Link to comment Share on other sites More sharing options...
audioguru Posted April 1, 2007 Report Share Posted April 1, 2007 Hi Collin,Many people are confused with the errors in this project. It is too bad nobody fixed the mistakes in the parts list and on the schematic.The parts layout drawing is correct except the LED is shown backwards.Look at the picture. It clearly shows ceramic capacitors and metallized plastic ones.Here are my notes: Quote Link to comment Share on other sites More sharing options...
audioguru Posted April 1, 2007 Report Share Posted April 1, 2007 Please do not make duplicate posts. I answerered your questions about our Lowpass Filter for Subwoofer project in your other post.The parts list and schematic in the project are still wrong. The parts layout and picture are correct. The LED is shown connected backwards on the parts layout. Quote Link to comment Share on other sites More sharing options...
MP Posted April 1, 2007 Report Share Posted April 1, 2007 The 3 capacitors on the right hand side of your picture are tantalum. Not ceramics.Collinph: I have moved all of your other posts into this thread. It only confuses everyone when you post your questions many different times in different places. Also, there is a link from the project to read the posts. These are only pointed to one place, so everyone would miss some of your posts if I allowed them to be made in other places.You can also click on the author's name in the project and ask questions directly if you still have confusion. Much of the confusion is caused when a project is translated from one language to another. Little things like silk screen imaging printed backwards is just something we have to live with when getting free projects from the web. This is part of the reason for this forum.MP Quote Link to comment Share on other sites More sharing options...
audioguru Posted April 1, 2007 Report Share Posted April 1, 2007 The 3 capacitors on the right hand side of your picture are tantalum. Not ceramics.I have seen many 39pF ceramic capacitors, but never a tantalum capacitor with such a low value. Quote Link to comment Share on other sites More sharing options...
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