Offboard wiring without using a switch

Started by SomeNoob, October 26, 2011, 06:35:31 AM

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SomeNoob

I've finished my very first DIY pedal, but i'm having some trouble with offboard wiring.

First, i cant get any DPDT or 3PDT switch, and since i'm not an electronics expert, i dont know how can i replace this lacking part, so i decided to build without the switch anyway.
But now i cant wire the parts correctly together. Here's a drawing of what i've done, hope it'll help you to understand what i'm talking about.



The jack plugs i'm using are probably mono, the plugs have only 2 connection points.
As you can see in the drawing, i've wired each in and outgoing wires to each plug, and i've wired the plugs also together. What i'm getting on the amplifier is, just a normal clean sound, even without the 9v battery.

Am i doing something wrong with the red wire shown in the drawing? I really dont know what else to do if thats what i'm doing wrong, any help would be appreciated, thanks.

artifus

try swapping the red and black on the jack on the left. it looks like you've connected tip of one jack to sleeve of the other. tip carries signal and sleeve is ground. you want signal to go thru the circuit. tip - circuit - tip. sleeve to sleeve. hth.

SomeNoob

Sorry that didnt work, but it reduced the static  :)
Weirdly enough, when i plug the jacks reversed, i still can get almost the same amount of sound out of the amp, but with much more static.

Main.Ace.FX

Quote from: artifus on October 26, 2011, 06:47:16 AM
tip - circuit - tip. sleeve to sleeve.

That's the correct way to wire audio jacks....something must be wired wrong somewhere else.  what is this circuit?  a full drawing of what you did would be helpful.  does the positive wire from the 9v go into the circuit in the same place as the input jack?  that's not something that's usually correct

deadastronaut

#4
^ yep a better drawing would be better...

you need to determine your circuit in...circuit out..

with tip in >  tip out   >

and both sleeves/grounds of your inputs/outputs to ground...

if your getting sound either way plugged in then your bypassing the pcb circuit... ;)
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https://deadastronaut.wixsite.com/effects

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Main.Ace.FX

Quote from: deadastronaut on October 26, 2011, 08:50:59 AM
and both sleeves/grounds of your inputs/outputs to ground...

forgot to mention that...connect the sleeves of the jacks to each other but also connect them to ground

SomeNoob

that is the full circuit actually, i didnt draw the parts on the board.
It's supposed to be the tonebender mkII i've got the schematics from tonepad.
Heres the schematic
http://tonepad.com/getFile.asp?id=86

the 9v (+) goes to the spot where its marked in the schematic above (it tells me there to connect the (-) wire)

And for my drawing... thats the best i can do, i would've send a photo of the circuit itself but i dont have a good camera for that sorry.

and i've checked the tip/circuit/tip order, re-wired them and have still the same result,
It gives me the same clean sound without a pedal plugged inbetween, no matter if the battery is plugged or not.

Main.Ace.FX

this is a positive ground circuit.  you have to reverse the 9v wires from what you would do normally....negative (black) powers the circuit, positive (red) goes to ground...do exactly what the schematic says...and don't forget to ground your audio jacks

deadastronaut

ahhh + ground..... i see.  a little info always helps...good luck. ;)
https://www.youtube.com/user/100roberthenry
https://deadastronaut.wixsite.com/effects

chasm reverb/tremshifter/faze filter/abductor II delay/timestream reverb/dreamtime delay/skinwalker hi gain dist/black triangle OD/ nano drums/space patrol fuzz//

SomeNoob

Quote from: Main.Ace.FX on October 26, 2011, 09:11:04 AM
this is a positive ground circuit.  you have to reverse the 9v wires from what you would do normally....negative (black) powers the circuit, positive (red) goes to ground...do exactly what the schematic says...and don't forget to ground your audio jacks

I cant do exactly what the schematics says because i dont have any dpdt or 3pdt switch, i have to wire these things without any switch.

I'll try to rewire the 9v though  :)

Main.Ace.FX

that's fine, you can do it without the switch.  I meant to follow the schematic in terms of the positive to ground, negative to power...also wanted to remind you that after you connect the sleeves of the jacks together, connect that to the positive ground of the 9v, then go to the ground on the board....all grounds need to connect to each other for the circuit to work

SomeNoob

#11
i'm lost sorry...

Should i connect the wire which connects both jacks together (sleeve) with the 9v positive?
could you draw a simple schematic for that?  :)

Edit:
I soldered the positive 9v to a jacks sleeve, now it doesnt work, nothing comes out of the amp now.

Main.Ace.FX

yes...both sleeves connect to each other, connect to the 9v(+) red wire , then all connect to the GND on the circuit.  9v(-) black wire goes to the labeled spot on the circuit.  tip of input jack goes to input on circuit.  tip of output jack goes to output on circuit.

had a problem uploading a schem, sorry

Main.Ace.FX

here you go....i did not draw the wires going into the board in the correct places, but just adjust their locations accordingly...you should be able to see where everything connects


Main.Ace.FX

Quote from: SomeNoob on October 26, 2011, 09:33:52 AM
Edit:
I soldered the positive 9v to a jacks sleeve, now it doesnt work, nothing comes out of the amp now.

did you solder the 9v (+) to the sleeves on both jacks?  you also need to connect these to the ground in the circuit

SomeNoob

Quote from: Main.Ace.FX on October 26, 2011, 10:09:24 AM
here you go....i did not draw the wires going into the board in the correct places, but just adjust their locations accordingly...you should be able to see where everything connects



I've done this exactly, but it doesnt work.
Could the circuit be defective? I've double checked every part of it after soldering.

@Main.Ace.Fx

I connected 1 9v positive to only on of the sleeves, should i connect the other one as well?
the 9v negative is also connected to the ground on the circuit.

Main.Ace.FX

Yes...both sleeves need to be connected to the 9v(+), then all that goes to ground....a circuit will not work unless all grounds are connected...my schematic shows the three wires connecting and all going to ground on the circuit

No...the 9v(-) does not go to ground...it goes to the spot on the circuit marked "9v -"

since the circuit is positive ground, the positive and negative wires are reversed from what is normally used

SomeNoob

Quote from: Main.Ace.FX on October 26, 2011, 10:26:23 AM
Yes...both sleeves need to be connected to the 9v(+), then all that goes to ground....a circuit will not work unless all grounds are connected...my schematic shows the three wires connecting and all going to ground on the circuit

No...the 9v(-) does not go to ground...it goes to the spot on the circuit marked "9v -"

since the circuit is positive ground, the positive and negative wires are reversed from what is normally used

Could you please upload a schematic? I'm completely lost right now, i thought "ground" and "negative" were the same terms according to my automotive-electrics knowledge  :D

Main.Ace.FX

did you not see the image i posted above....i will repost for you



since this circuit is positive ground, ground is not negative...ground is positive and negative powers the circuit...just take what you know and reverse it

SomeNoob

Quote from: Main.Ace.FX on October 26, 2011, 10:58:57 AM
did you not see the image i posted above....i will repost for you



since this circuit is positive ground, ground is not negative...ground is positive and negative powers the circuit...just take what you know and reverse it

This is exactly how i wired my circuit now, it still doesnt work