Author Topic: 3: Build pictorial  (Read 225538 times)

aron

Re: 3: Build pictorial
« Reply #120 on: March 14, 2011, 04:19:08 AM »
Good luck!

JebemMajke

Re: 3: Build pictorial
« Reply #121 on: April 28, 2011, 06:12:09 PM »
Hi, I am new to this diy pedals and i am starting with this project. One question, since I am not in a position to acquire all the parts for this project, well I have 95%, can i replace that transistor with, for example, this one http://www.alibaba.com/product-gs/426356418/MOSPEC_high_voltage_Transistor_F12C20C.html ?
Yeah I am a n00b :).

aron

Re: 3: Build pictorial
« Reply #122 on: April 28, 2011, 06:44:52 PM »
No, you want an NPN transistor from any local store.
http://www.fairchildsemi.com/pf/2N/2N3904.html
Ask for a 2N3904 or equivalent.

JebemMajke

Re: 3: Build pictorial
« Reply #123 on: April 28, 2011, 07:24:41 PM »
Yeah, well that's going to be a problem, for you see I am from a small town in Serbia and I have limited choice when it comes to electronic components, or those components are very expensive. But i do have a lot of junk laying around the house. There must be some transistor i could rip from something and use it in this ( or some other ) project.
Can i use any of these?
224sbl2040ct, g945pw 26, 58050D 331 ( I have 3 of these ), k30az 5f, cbc337 -25 ( 2 of these ), c945pw 26, a1015gr3k.
What am i after in transistor? Some specific voltage or HZ, A, Farads, Ohms?

.Mike

Re: 3: Build pictorial
« Reply #124 on: April 28, 2011, 07:57:37 PM »
Can i use any of these?
224sbl2040ct, g945pw 26, 58050D 331 ( I have 3 of these ), k30az 5f, cbc337 -25 ( 2 of these ), c945pw 26, a1015gr3k.

I can't find any information on most of these, but:

S8050D = PNP transistor = won't work.

cbc337 -25 = NPN transistor = will probably work. Hfe = 100 - 400.

Good luck!

Mike
If you're not doing it for yourself, it's not DIY. ;)

My effects site: Just one more build... | My website: America's Debate.

JebemMajke

Re: 3: Build pictorial
« Reply #125 on: April 28, 2011, 08:20:27 PM »
Thanks for your info, support and help. I will try and finish this project tonight.  :)

aron

Re: 3: Build pictorial
« Reply #126 on: April 29, 2011, 12:06:19 AM »
Yes, I would try this one: cbc337

JebemMajke

Re: 3: Build pictorial
« Reply #127 on: April 29, 2011, 12:45:00 AM »
cbc337 showed 37 HFE, but i ve found c945p ( http://www.futurlec.com/Transistors/C945.shtml ), and it showed 230 HFE. So that's the one i used. I 've completed the board, only the switch, power and input/output to connect. :)
Very nice project, excellent for beginners. I've learned so much in these 2 hours.

JebemMajke

Re: 3: Build pictorial
« Reply #128 on: April 29, 2011, 12:48:00 AM »
Pardon me, it's been 4 hours xD.

aron

Re: 3: Build pictorial
« Reply #129 on: April 29, 2011, 04:42:29 PM »
Good luck with the wiring!

Aron

Musok

Re: 3: Build pictorial
« Reply #130 on: January 27, 2012, 06:35:59 AM »
Hi guys,

Ordered the items to do this while they dont arrive... Tell me something. I understood the need of a stereo jack. What about the cable that connects from pedal to pedal, guitar to pedal... does it need to have a stereo? Or mono and using the ground of the jack to know if it's connected will be fine?

.Mike

Re: 3: Build pictorial
« Reply #131 on: January 27, 2012, 08:47:48 AM »
Hi guys,

Ordered the items to do this while they dont arrive... Tell me something. I understood the need of a stereo jack. What about the cable that connects from pedal to pedal, guitar to pedal... does it need to have a stereo? Or mono and using the ground of the jack to know if it's connected will be fine?

Hi,

You will use regular, mono guitar cables.

When you insert the cable into the jack, the sleeve of the cable makes contact with both the ring and the sleeve of the jack. This completes the circuit, connecting the ground, and turning the circuit on. :)

Mike
If you're not doing it for yourself, it's not DIY. ;)

My effects site: Just one more build... | My website: America's Debate.

Bod

Re: 3: Build pictorial
« Reply #132 on: July 27, 2012, 03:22:55 PM »
Hi all,

I've been bitten by the diy bug and thought I'd give this project a go.  I've got my components laid out on a breadboard, and although it works to a point, it only outputs when I play the strings very hard.

Any ideas?  I've read somewhere about transistor biasing, could that be the issue?  If so then how do I do it?

Ta,
Bod.

entinggi

Re: 3: Build pictorial
« Reply #133 on: August 02, 2012, 02:23:24 PM »
Wow this really helps.. It enlightened on how to connect the parts using the perfboard/stripboard... I have  a question, how about the trace cuts. How do you trace cuts for a stripboard?

artifus

Re: 3: Build pictorial
« Reply #134 on: August 02, 2012, 02:31:15 PM »
you could use a trace cutting tool, a blade or rotary tool. if it's just a few cuts i use a 3 or 4mm drill bit, without the drill, centered on a hole.  it takes just a few twists between your finger and thumb applying light pressure to cut a trace.

entinggi

Re: 3: Build pictorial
« Reply #135 on: August 02, 2012, 09:34:44 PM »
How do you know which part to trace? I have a problem of translating the schematics into the real thing...

aron

Re: 3: Build pictorial
« Reply #136 on: August 03, 2012, 05:38:17 PM »
Start off with a simple project. After a while it will become easier like anything else.

Musok

Re: 3: Build pictorial
« Reply #137 on: November 13, 2012, 05:23:12 PM »
I've made a little setup to work on pedals:


So here is the NPN Boost on the breadboard (i don't know how to show it better):




But it isn't working!
The transistor is working (I think), the sound gets to the amp but the pot isn't doing a thing! I could get rid of the 9v and the part of the pot without a difference.

Can anyone tell me what I'm doing wrong?

By the way I had the second pot so I can have a way to control the signal / volume overall getting to the amp. This way I can turn it down and work without getting feedback on the amp when I don't really want it.

esdiezy28

Re: 3: Build pictorial
« Reply #138 on: November 14, 2012, 08:38:47 AM »
@Musok-   despite the very large pics you posted I can't quite read the component values. Also... whenever I test something on my breadboard, it picks up some RF, from not being in a shielded case. Usually sounds alot cleaner after I build it into a metal enclosure.

Double check the polarity of your electrolytic capacitors. What you've described made me think that maybe the bootstrap cap (22uf) to Q1 Emitter could be backwards. First time I built this I think I put every polarized cap in wrong at first. Its a learning curve, but once you clear this hurdle, you can move onto bigger and better. Best of luck! ToNy
Ruby Amp, Noisy Cricket, NPN Boost, modded Mockman 1.0, Bazz Fuss, J201 Fetzer Valve, Valvecaster, modded Valvecaster

Resistance is futile!

Musok

Re: 3: Build pictorial
« Reply #139 on: November 14, 2012, 08:42:51 AM »
@Musok-   despite the very large pics you posted I can't quite read the component values. Also... whenever I test something on my breadboard, it picks up some RF, from not being in a shielded case. Usually sounds alot cleaner after I build it into a metal enclosure.

Double check the polarity of your electrolytic capacitors. What you've described made me think that maybe the bootstrap cap (22uf) to Q1 Emitter could be backwards. First time I built this I think I put every polarized cap in wrong at first. Its a learning curve, but once you clear this hurdle, you can move onto bigger and better. Best of luck! ToNy

The problem isn't really the cleaness but ... maybe i'll try rever the emitter cap and see what happens. Now I have negative -> positive -> Emitter.