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Topics - ThePastRecedes

#1
*This may be in the wrong section move if necessary*

Okay, I know zero about BBD in terms of purchasing them and what to look out for. I've got a few pedals that are almost finished but just need a few BBD chips. I was thinking of purchasing from the ebay seller "hkutsource". Is there anything I should be wary of?

http://www.ebay.ca/itm/5PCS-MN3008-Manu-PANASONI-Encapsulation-DIP-8-2048-Stage-Low-Noise-BBD-/380926524219?pt=LH_DefaultDomain_0&hash=item58b0fd7b3b
#2
I'd like to breadboard one of these but where are they sold? I've only been able to find TAD but that's in Europe. I live in Canada so I'd prefer to keep it in North America.

It's probably obvious and I've missed it  ;D
#3
I'm lost. It's been a while and I can't work it out... The pedal works very nicely but with the volume at full there is a slight drop in volume.

If I remove Q13 to stop the lamp oscillating it is clear that there isn't a volume drop at max.
#4
I've been building pedals for a couple years now but I only order parts on a pedal by pedal basis.

Edit: Here is the parts order. http://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=f526a5afd3
There are a few values missing but this should be fine for majority of my projects. Bellow is listed what I have.

200 of each xicon resistors from mouser.
100R
330R
470R
1K
1K8
2K2
3K3
3K9
4K7
5K6
6K8
10K
22K
27K
39K
47K
56K
100K
220K
330K
390K
470K
560K
1M
2M2
10M

Panasonic Electros
470u - 10
100u - 100
10u -100
1u - 100

Panasonic Film Caps
220n – 100
100n – 100
47n – 100
33n – 100
22n – 100 
10n – 100

MLCC
4n7 – 100
3n3 – 100 
2n2 – 100 
1nf – 100
#5
Tech Help - Projects Page / Sweep Control - Phasers
July 20, 2014, 08:24:05 PM
I'm just playing around with phaser circuits and I came across a moogerfrooger schematic. I listened to a few demos and I love the sweep function. I'm thinking of implementing it on another phaser but I'm not 100% on what it actual does to the LFO and how it works.

From the manual :
QuoteSWEEP: Moves the frequency response pattern through a six-octave range. Use the SWEEP panel control and/or the SWEEP pedal control jack.

Any ideas on what the transistor and opamp do here?
#6
The idea was to build a Harmonic Percolator 2in1 pedal with separate in/outputs so it can be routed in multiple places on a pedalboard.

So the Systech OD half... I hate perfboard, stripboard... all of them... Since I couldn't find a PCB I decided to just make it. It's more time for me but it'll give a much better looking build. Here's the schematic drawn in Eagle:


I worked out a PCB layout. I have to boards left too if you don't want to make them yourself. They're designed to fit in a 1590A


Printed at OSH Park:


Filed the edges nice and smooth:


Partially populated:



I don't have many pics of the HP part but here it is with all it's mojo. It just needs a few more parts.


And the enclosure it will go in:




Drilling template attached


Drilled


Mockups double checking for clearance. Nothing is perfectly straight since I didn't tighten the parts down.




Nearly there, just needs the germanium soldered in for the percolator.



Finally done!

I was sent a knob less than I should have so it's got my tele knob on there until it arrives.   





The Systech Overdrive sounds fantastic! I'm building it off schematics I've found online so I'm going to compare it to some online demos and see if it needs any tweaks. But hey, I think I'm gonna build myself one exactly like this. I'll probably add an expression input for the EQ since it's very wah-like. If you want a cocked wah fuzz, this is it!
#7
General Questions / Nu-Tron Build docs? LDR specs?
June 06, 2014, 02:03:02 AM
I'm gonna start building myself a mu-tron ii phasor. I've got haberdasher to etch me a PCB.

I've found this doc: http://juansolo.demon.co.uk/stompage/schematics/Madbean/NuTR0nPhaser.pdf

It doesn't have part list... I know I can look through the schematic and make one but I feel like I'll miss something out and then have to do two parts orders.

It also doesn't have in formation about the LDR specs.

Could anybody help me out?

Thanks!
#8
General Questions / Where to buy 1/8W resistors
May 15, 2014, 05:40:50 PM
I've got a few 1590A builds that I'd like to finish but I forgot a few resistor values on my last mouser order. Is there anywhere else that I could order 1/8W resistors? I'm not down to pay $20 for shipping a few parts...
#9
*If this should go in the members projects section please move*

I have had this idea in my head for a while. I've been reading about envelopes for a while and I finally got the time to draw out what I had in my head this morning.

The Idea was to have a pedal that noise/crackle would interact with my playing with a bpf on the guitar signal.  I wanted to emulate a radio recordings.

Lets start. Part 1
- Input stage. I have get to decide the gain/values.
- Then I've got switchable low and high pass filters.

Part 2
- Envelope follower from the meat sphere. Not my work. Comes out of the input stage. But theres a half wave rectifier and then and inverting opamp to create the envelope.
- Another inverting opamp stage to "reverse" the envelope.

Part 3
- The two transistors are there as a noise generator.
- The OTA is there as a current controlled amplifier. I got the idea from this: http://www.geofex.com/Article_Folders/VCA%20Applications.pdf
- The envelope controls the the volume of the noise.

Part 4
- A panner to pan between the guitar signal and the noise.


Tell me there is a simpler way! Would I just be better off using a simple resistor and a cap for the filters rather than what I have? Any comments are welcome good or bad!

I have yet to breadboard this idea.  :-\ I'm moving tomorrow so I won't get round to it for a while.

I've attached a schematic and the eagle file for anyone who wants to join my adventure.
#10
Hey there,

I currently use .032 60/40 solder that I bought a pound of from Active Electronics in Ottawa. I lasted me just under a year. I am about to run out and I'm in the mood to try something different.  I've searched around on this forum and there doesn't seem to be any info about lead-free solder. Is it hard to work with in comparison?

I've just bought an SMD PT2399 Delay of pickdropper and have my first go at SMD. Is there a specific gauge of solder you guys prefer? Also I read that flux pens are a necessity when doing SMD work. This is the only one available at mouser (that can be shipped to Canada) would this be okay?

http://ca.mouser.com/ProductDetail/Kester/952D6/?qs=sGAEpiMZZMtyU1cDF2RqUBbfted9QYcQxvK4ulH8h7Y%3d

Thanks!
#11
Open Discussion / Name this enclosure!
August 10, 2013, 08:21:44 PM
I was just surfing the net and I've come across this image. I've got no idea where the circular enclosure comes from. It's not hammond form what I can see since it's not on their site.

#12
How do you guys go around thinking of original names?

I want to think of a name that will be original to me, like a brand lets say. Any thing I think of that can be used is usually taken. Not necessarily by a pedal company but somebody on the internet. For example a band or a tumblr blog. Where would the legality be if I used the same name? Good, Bad or Ugly?  Would I be better off using "example name" pedals instead. I would much rather use "example name" than attach pedals/electronics/industries ect.. to it.

I'm only a hobbyist but still I would like to have a labelling system and logo so I know what I've made once I have sold it. If I choose to sell it. I don't want to spend hours designing logos and graphics if the end product could be illegal. I know I wouldn't get sued or taken to court simple because I wouldn't be making millions of dollars and there would be nothing to get from me. I just want to prevent any idiots arguing with me  ::)

Usually the domain names are available...

Anybody with experience in this area?
#13
General Questions / Low rider volume drop?
July 26, 2013, 01:49:08 PM
Hey,

I've just tested the lowrider that built last night and when I turn everything down and only the two octave down there is a light volume drop. Nothing major but just curious. For ICs 5&6 I have used LM324 instead of TL072's. I have yet to think about it since I'm getting ready to go right now but is this normal?

Thanks!
#14
I've noticed that I haven't posted my last few builds. I've done a few more recently but there's been no decal work so I'll just leave them out.

1) 18 volt big muff pi. Using madbeans road rage PCB and some perfboard. I added the AMZ presence control too.






2) Music PCB Tap Tempo Tremolo with external tempo input. Great tremolo but I don't know if I would really use the Tap tempo part.





3)2 In 1 pedal. It's a devi ever torn's peaker and an EHX LPB-1 in a single box. It's built on perfboard. A bias knob was added to the 1st transistor (the hunger knob) and an input volume knob was added.





4&5) The yellow pedal is a Vemuram Jan Ray. No mods strait up clone done on perf. I can say after building it that it is not work the $400 they sell for. Nothing so socking that makes me want to spend that much on a pedal. Also it' pretty much a timmy clone.

The blue pedal is an MXR blues box cascaded into an electro harmonic LPB-1. It's great to have no volume drop.





#15
General Questions / Aquaboy Deluxe & Dirtbag
June 19, 2013, 09:06:06 PM
Hey,

I've question about either of these PCBs. I'd say I'm fairly competent with making fuzz, overdrive, and distortion pedals and understand how they work and the methods I can use for debugging.

I've made a phaser (madbean stage fright) I just followed the instructions that were on the pdf it worked perfectly.

So is there anything about either of these projects that won't be strait forward? I'll just follow the instructions in the pdf. Will I be fine?

Thanks!