Hello.
The idea behind Tap Tempo in analog modulation and delay pedals is not new, but still hasn't been covered in detail at the DIY level.
I looked through a lot of commercial products such as JHS, Chase Bliss and noticed that they all use BBD 3007/5, 3207/5 with a clock as a module (do not give up on them, unlike Electric Druid projects).
Obviously, the main change in the circuit is the replacement of the analog LFO with a microcontroller.
I see 2 obvious options for implementing a similar...
From Electronics & Music Maker , this is a unit that selects the order in which multiple stompboxes are connected between the musician and the amplifier.
The design came from the October 1981 issue of the magazine. Note that rather the magazine issue being a pdf file, the entire issue is in the form of an internet page, the URL of which is on the Write-up tab of the attached Spreadsheet. There are a few errors and omissions on the ORIGINAL circuit diagram, which I have, hopefully, corrected....
This is a circuit I've had from something I photo-copied 40-odd years ago. Basically, it's a Fuzz unit, but with a few bells & whistles .
I've mentioned it in the text, but the circuit uses an LM301, which needs an external capacitor for frequency compensation. I'm fairly sure that this device can be replaced with another op-amp NOT requiring this capacitor.
I have one of these coming in for repairs and a re-house, anyone have a schematic for it floating around? The one that used to be out there is no longer around. Thanks!
DISCLAIMER - PROGRAMMING IS NOT MY STRONGEST SKILL
Link to the article -
Benoit's article uses the C programming language to program the PIC and even though he step by steps it, I've run in to issues. The first time I tried to program the PIC the circuit and LED would turn on but not off, so I erased the PIC and started over. Now nothing happens and the only way I can get the relay to switch states is by connecting pins one and two of the 12F675.
I just finished up a Harmonic Jerkulator build, from Escobedo's wonderful schematic. I really like the sound of this pedal, but that volume control is near useless (you can just as easily change the volume on your guitar/synth for the same effect). Does anyone have any ideas on making the volume control on this pedal a little more like a traditional volume control? I suspect it will also help tame some of the crazy loudness on this thing.
The Echomatic is an old Stompboxology circuit which utilizes a quad opamp as two splitters and two mixers, allowing you to take advantage of a three-head tape deck for delay effects. In simpler terms, you can plug this into a three-head cassette player (or reel to reel) to make a tape echo.
It sounds pretty cool. It's not going to replace anybody's El Capistan, but it's useful for some warm slapback or lofi, modulated ambience. Because the tape...
Hello Im not able to put put more than 14 db-15 db out of a jack orman mosfet booster, its biased at 5.3 v and Im using a bs170 ( with less volt the results are the same) and I have try a dozen, with the same results not near the 35 db that theoretically you can pull out of this...
Its for the tranny used? (bs170).. with a nte490 or 2n000 you can get more gain???
Thanks in advance
Hullo! Well, at last there is a pcb for the clone of the very, Iomi-esque, tychobrahe parapedal available from Pedalpcb. I was lucky to get a nice 2w dual gang 10k pot for my build.($16.99-ouch!)
I know Chicago Iron works has a dead on clone called the Parachute, but I am intrigued at the wilson effects clone and its mods, this from a description on the page, There is an added six position Q switch that adjusts the filter settings of the wah pedal. These range from a high filter sweep to a deep...
Hi I'm pretty new to this forum because I come from the DIY synths world, and getting now also interested in pedals that color my sound.
I sucessfully built my MusikDing 3verb pedal a while ago and I'd now like to build a compression pedal with side-chain features. I didn't find a single one on the DIY community (if you know one, please show me !) when I found Seb's Box'O'Trix : that he doesn't support anymore.
I'm only interested in the Squeeze Box section of this monster, that has this...
It was not created with the ROG techniques because the schematic of the VH4 is not known, so we created a preamp with a spectral analysis of an original VH4 to see which frequencies are typical of the VH4 sound (channel 3 & 4 ).
We worked 6 months on it to do the last schematic.
I don't know if anyone is familiar with this pedal (original or clone project)
I've built it and it works quite well.
But there some minor issues.
Firstly, one side of the BBD Ics (ic 9 and ic 8 ) have quite different voltages to the nominal ones and the other side of BBD Ics - Ic 3 and 4 (even if the effect sound on both outputs is pretty much the same).
And the voltages on all test points seem correct. I have to admit that I haven't used an oscilloscope for calibration. Just a DMM....
Hello
I want to build an active Baxandall eq , but im' missing the 3.9K resistors from the BoM (i have every other component).
However, I do have both 3.3K and 4.7K resistors : i am considering using 3.3K resistors instead.
My question is the following :
- I'm assuming it is safe for the circuit to put a capacitor with a 20% average tolerance value (i mean 3.3k instead of 3.9k), so that the circuit will still work without a big change in sound and without messing the circuit or the other...
I'm building the Giant Hogweed circuit at tagboardeffects -
The schematic is here -
I've got all the parts except for the LM308 chip. But I'm having trouble finding one. Could I use an alternative? I see them on eBay but I'm not sure whether they are fake or bad quality.
a poorly drawn vero layout for this powerful blender/mixer with phase correction. i left out the killswitch and the pot for dry gain because they seemed redundant.
this layout is not verified atm.
Hello
I am willing to build a modded Valvecaster, and i would need some advices from the community.
I picked some hints from the nice document found here :
The mods are :
1- feeding it 12V (instead of 9V) to get more headroom and have the tube work at the texpected specs.
2- adding a regulator to get rid of hum and buzz.
3- being able to have more gain if desired, by adding a switch.
4- bass boost mod.
My questions are the following :
1- Is the overall wiring correct (For the 3PDT, i...
I have built the Brown Betty from Pedal PCB The only variance from the parts list i used was a 4001 protection diode instead of the called for 1N5817.
I understood (per the website) that this is supposed to be Inspired by the Friedman BE-OD and Dirty Shirley and basically a BE-OD with a mid control. It seems to be much lower distortion/clipping than the Thermionic Distortion from Pedalpcb.com which is the Friedman BE-OD clone.
Hi this is my first attempt at converting a schematic into a veroboard layout, I haven't built it yet but should be able to verify soon. Can anyone see any glaring errors?
Also I want to make the frequency variable, on this design in the book (DIY Projects for Musicians) it suggests using some sort of switching to change between capacitors for C1* and C2*, would it not be easier to replace R5 with a potentiometer (10k in series with a small resistor i.e. 330ohm to set upper limit and 100nF caps...
Already asked questions about Engineer's thumb
But recently stumbled upon a Byoc 5 knob
For ET, there is simplicity in assembly, and fewer details (controls correspond to studio devices).
For Byoc, simplicity in the governing bodies is said. I'm really far from the studio work and do not really understand the fundamental principles of the ratio / threshold / release
Byoc for me is more logical and understandable.
As far as I know, ET is considered the best diy compressor based on ota, but tell...
I'm currently drafting a perfboard layout for this one. I'm confused about the delay pot. In the schematic, the pot's third pin is shown as going to the PT2399's pin #4 (DGND), which is directly connected to pin #3(AGND), which in turn is grounded. The path is shown as grey (the rest of gnd is green) in the pcb's layout. Wouldn't it be the same if the pot's third pin was grounded somewhere else?
Also, somewhere I can read more about how this specific part of the circuit (delay time) works,...
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