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#1
Yea, while all of you are doing long pedal builds that take weeks, I am here taking a whole day to do one pedal . So yea, yet another one of my builds has neared completion today. With at least 5 hours of building, troubleshooting, testing, measuring, soldering, cutting, mounting, switching, turning, etc... I have finished yet another pedal. Yes I am a monster . This is the Bobtavia, which is another Octave Up pedal with some drive, since I wasnt happy with the Octup... This is a Transformer and IC Chip based pedal. It sounds great with a fuzz pedal before it too.

Well I added some features. I put an LDR for the only resistor in the circuit (100k), but also put a switch to go from the LDR (foot control) and the 100k resistor (standard). I have a footswitch. I will have a power switch, LED, and an adaptor jack tomarrow. I will box it up tomarrow too.

So I know you all want the pictures of course:







Heres some tone setting descriptions: (G-Guitar P-Pedal)
Thin, aparent octave: G Volume-10 G Tone-0 P Gain-10 P Volume-10
Octave with crunch: G Volume-10 G Tone-10 P Gain-10 P Volume-10
Clean octave: G Volume-3 G Tone-10 P Gain-10 P Volume-10 (Single Coil/Neck Humbucker)

Let me know what you all think!
Kerry
#2
I didn't remember you... then I saw how you soldered. I was thinking, "Hey! It's the amazingly neat soldering guy!"


Dude you make some awesome stuff. Love to read your threads. Keep it up.
#3
Soul Taker- haha thanks! I definately will make threads everytime I build something which is all the time. This one wasnt such a great soldering job. I used one transformer, took it out and used a new one, I changed the socket once, I took out a resistor, put an LDR, then took LDR out and put both in with a switch, etc... The secret to my semi-neatness is Desoldering Braid. Once you know how to use it right, it will be used almost more than the actual solder. I just salvaged 2 boards from 2 pedals that I didnt want by desoldering and cleaning it up amazingly. If you want pictures of those 2 boards, I can post them.
#4
Quote by call1800ksmyazz
Soul Taker- haha thanks! I definately will make threads everytime I build something which is all the time. This one wasnt such a great soldering job. I used one transformer, took it out and used a new one, I changed the socket once, I took out a resistor, put an LDR, then took LDR out and put both in with a switch, etc... The secret to my semi-neatness is Desoldering Braid. Once you know how to use it right, it will be used almost more than the actual solder. I just salvaged 2 boards from 2 pedals that I didnt want by desoldering and cleaning it up amazingly. If you want pictures of those 2 boards, I can post them.


Please post pics! I'm always up for that
#5
^-haha, ok, but tomarrow morning. sorry, but its late and all and I am very tired from all the work, and my parents are asleep so I dont want to walk past and wake them or anything... check back tomarrow.
#6
^ haha you are an animal!!! sweet sweet analog octave, nothing quite like it really, dsp doesnt even come close.
#7
^-haha thanks. this is a great octave. I cant wait to get it all boxed up so that using the LDR is much easier

Quote by soul_taker
Please post pics! I'm always up for that

Ok pictures of 2 desoldered boards...


^-This one is blurry but shows how close and smooth it is now. I have desoldered and cleaned both boards.

Thats all off topic, but now back on topic... Comments... Sound Clips soon!
#8
Quote by call1800ksmyazz


Thats all off topic, but now back on topic... Comments... Sound Clips soon!


Can't wait for sound clips.

Just a thought but maybe you could ask the mods for permission to make a "How to Solder Thread" and have it as a sticky. Soldering is widely used in customization and you seem to be a pro at it. Sorry if there is already a lesson on it and I didn't see it.
#9
Wicked.... Jesus man you get a lot done.

Do you have a schematic, and possibly a parts list for this one? Also what the heck is that big weird looking thing next to the transformer.
Hai UG!
#11
Thanks guys. Sorry I have been out today and also finished the pedal.

The circle thing there, like Greenbox said, is a Light Dependent Resistor (LDR). This is a sensor that changed the resistance value depending on how much light is getting to the sensor. I have a switch to change between 2 modes. Mode 1 is Standard mode with a 100k resistor. Mode 2 is Foot Control mode with the LDR.

Heres some final pictures before the sound clips which will be here tomarrow:




#12
niiice.

quick question about octave pedals in general - does it make your guitar sound quite bass like or is it more of a synth like effect? could you hypothetically run it in parallel with a dry signal (i already have schematics on how to do that) and create a fuller sound? ala iron maiden heroic riff that takes 2 guitarists on different octaves to play?
Marty
#13
^- Thanks. What you want is a pitch shifter. An Octave gives either a high or a low octave and it gives some fuzz to the sound because its a strange type of circuit. Its more synth like and ring modulator like.

Now sound clip!:
1. Long Demo of just random stuff. Im not demonstrating my playing at all (horrible playing), but the pedal: http://media.putfile.com/Bobtavia-Demo

I had another clip, but it didnt record for some reason so I guess more later.
#15
^- Well its an LDR "option". It can be switched to normal or LDR modes with the switch on it. Its just that I ordered like 8 LDRs and they are awsome so I decided to add them as a little feature. With this LDR it more controls volume and is kindof like a trelmolo pedal if you move your foot up and down over it.
#16
oh, ok thats cool, sounds like a good option to me, i thought maby you were useing because you were broke or something...where did you get the schematic at?
#17
Yea. No, its not cause im broke. Heres the schematic and layout. The layout was wrong when I used it so I had to follow the schematic, but I told him and he corrected it.
#20
ok thats pretty cool, not too hard of a schem either, kinda nice for the sound you get out of it, pretty good build, this should score you some points with the mods...maby get on the who to listen to list, haha it all really means nothing though, these forums seem like just one big pissing contest sometimes anyway.....
#22
so you and doug hammond moded it? thats cool. i personally wouldnt mod it untill i broke in the original pedal but thats just me...
#23
^--Yea, well usually I make it normal, and then change some things. Or I just intentially change capacitor values for more of a certain frequency or something. Idn, I do some stuff sometimes...
#24
yea only if they had variable capacitors, that would be sweet...they dont make those right?? now that i think about it ive never looked...
#27
oh, i'm certain that they're not the kind of thing you'd want to put in something like a pedal
#29
Being ceramic and all...?

Anybody with half a brain could see that the real issue is that they only go up to 120pF.
They might be useful for bleeding off some RF though.
I'm not very active here on UG currently.
I'm a retired Supermod off to the greener pastures of the real world.
#30
Quote by sempri_fi
yea only if they had variable capacitors, that would be sweet...they dont make those right?? now that i think about it ive never looked...

It's VERY easy to make one of sorts.
Just use a pot to pan between a large and small value. All done.
I'm not very active here on UG currently.
I'm a retired Supermod off to the greener pastures of the real world.
#31
^Would that method of panning between 2 capacitors work well for switching the range of a wah pedal, instead of having a rotary switch and several caps?

And tut-tut for double-posting Pink!
My gear;

Custom HSS Strat (eBay'ed parts)
Fender Acoustic
DOD EQ
EH Big Muff
Home-made Wah
Home-made Booster
Laney LC15

Looking for a Jazz Bass body to refinish

My DeviantArt Page, MySpace Profile
#32
^Yep, it would work great. Make sure you use a large value pot so you have better control.
I'm not very active here on UG currently.
I'm a retired Supermod off to the greener pastures of the real world.
#33
^hey pink dont double post....you'll get banned....hahaha
yea but i was talking about the whole mojo idea surrounding ceramic capacitors, some say they sound sterile...and those up there are ceramic....oh and by the way, why dont you just go out and edit all of my posts saying this guy is an idiot, its alot easyer than argueing every post i make...
#34
Quote by sempri_fi
^hey pink dont double post....you'll get banned....hahaha
yea but i was talking about the whole mojo idea surrounding ceramic capacitors, some say they sound sterile...and those up there are ceramic....oh and by the way, why dont you just go out and edit all of my posts saying this guy is an idiot, its alot easyer than argueing every post i make...

This is more gentlemanly.
I'm not very active here on UG currently.
I'm a retired Supermod off to the greener pastures of the real world.
#35
how much for one?
Amp:
Fender Blues Jr (GH1230 Celestion Speaker)
Pedals
Barber DD
Wilson WH-10 Clone
Ibanez WH10 V2

Pitchblack Tuner
Boss DD-3
Guitars: 06' Custom Fender Strat Lindy Fralin Blues Specials, Callaham Tremolo
09' Olympic White Stratocaster
#36
true bypass?
Amp:
Fender Blues Jr (GH1230 Celestion Speaker)
Pedals
Barber DD
Wilson WH-10 Clone
Ibanez WH10 V2

Pitchblack Tuner
Boss DD-3
Guitars: 06' Custom Fender Strat Lindy Fralin Blues Specials, Callaham Tremolo
09' Olympic White Stratocaster
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