I have a ds 1 from 1989 the circuit board isnt labeled with r, and c values. The byoc yellow overdrive is an exact clone of the very first version boss od 1. Circuit simulation tutorial in 20 steps, or sothe aim is to simulate the frequency response of the 1st stage tone stack of bd2 and optimize individual components. With a minimum delay of 30ms and a maximum of 340ms that could be extended up to 1 second at the expense of sound quality makes it perfect for delay, echo and reverb effects. Keeley ds 1 ultra mod much more tone thanks for your purchase.
Case in point i can alter the ds 1 to give it stellar cleanup. Many wellknown effects like beltonaccutronics reverb module, danelectro fabecho, and the rebote delay use this chip as the core of the circuit. Plus, as you change values, you see which frequencies they affect, and how a little experimentation goes a long way and can save a lot of soldering. Asio is a trademark and software of steinberg media technologies gmbh. Boss sd 1 super overdrive pedal schematic diagram the boss sd 1 super overdrive is a pedal with a simple design, using only one dual operational amplifier upc4558c and 6 transistors, with an asymmetric overdrive circuitry for a classic, natural tube amp growl. The stock ds 1 uses a pair of 1n914 silicon diodes. This kit will provide you with all of the components high quality panasonic and multicomp caps and metal film resistors you need to mod your ds 1 to keeleys specs.
This analysis is focused in the latest pedal schematic revision which is easy to find and prone to modifications. Boss ds2 service manual,repair schematics,online download. Aug 31, 2016 building diy guitar pedals for beginners. Select from a huge library of vector schematic diagram symbols that scale easily without quality degradation.
The free information society ibanez ts9 electronic circuit schematic would be easy enough to mod the ts9 though for assymetric clipping. This is the classic distortion pedal launched a million guitar solos. Nerdy circuit stuff comparing the boss sd1 with the ds1. The boss ds 1 has a very heavy metal timbre to start with. Guitar effects pedals guitar pedals boss pedals diy guitar pedal electronic schematics.
It is a suite of vst plugin with amplifiers and analog processors for guitarists, currently containing the simulation of. The ds1x launches the famous boss distortion into a modern era of expression, delivering an unmatched level of performance for guitarists with an ear for tone. In 1978, boss engineers changed all that by developing a unique distortion circuit for the ds 1 that produces tight, hardedged gain with rich harmonics while retaining the unique characteristics of different guitars and playing techniques. Made in japan, with a distinguishable silver screw. Also, the 47pf cap across d4 and d5 doesnt seem to be shown unless im misreading something. Here is a schematic of the ds 1, unmodified from its outof. So you have a ds1 that you got for free in a craigslist trade, or real cheap as your first pedal. I am sure you will be very pleased with the tone of your new ds ultra distortion pedal. Does a wah pedal sound better before or after distortion. The distortion is produced using a variable gain circuit with diodes clipping the waveform. During its life, the boss ds1 distortion has had two schematic revisions due to components availability. Smartdraws schematic diagram software is easy to use. The first is connected as an emitter follower, and the second as a commonemitter amplifier.
Part number description usbrs422pcb usb to rs422 level uart pcb table 1. The ds 1 can get a lot more distortion than a tube screamer type pedal like the yellow boss sd 1 and make a fender amp sound like a marshall after our mods very full, deep, and rich. Most boss pedals, including the ds 1, use two npn transistors at the input. Schematic diagram maker free download or online app. Boss ds 1 the boss ds 1 is probably one of the most famous distortion pedals in guitardom. Tisk tisk my friend tis the sd 1 that is assymetric. Every component changed or added is of the highest quality. Boss ds1 distortion instructions manual pdf download. Power supply, clipper amplifier, tone control and output stage. The pro co rat circuit can be broken down into four simpler blocks. The free information society boss sd1 electronic circuit schematic ts9.
Sequential circuits sequential circuit prophet 2000 service manual. Boss sd1 super overdrive guitar pedal schematic diagram. Id still argue that boss marketing missed the mark, and the crunch term is further proof of that. Boss od 1 overdrive was one of boss first compact effects pedals, and offered a number of new features including silent fet switching to eliminate pops and clicks, rubber panels on top and bottom, quickaccess battery compartment and recessed knobs.
By rotating the knobs you can create all kinds of sounds, from warm, soft sustain to hard, powerful distortion. Boss service manual downloadcircuit downloaddownload. Referring to the electronic design, the current boss ds 1 has a simple circuit. The boss sd1 super overdrive is a pedal with a simple design, using only one dual operational amplifier upc4558c and 6 transistors, with an asymmetric overdrive circuitry for a classic, natural tube amp growl. Boss ds1 pedal schematic diy guitar pedal, guitar gadgets. The boss od 1 is becoming a very popular overdrive. Boss ds1 keeley mod 2019 maxwell audio designs reverb. The emitter follower presents a high input resistance for a guitar, and the second stage boosts the signal enough to drive whatever follows. View and download boss ds1 distortion instructions manual online. Robert keeley graciously shared his seeing eye and ultra mods with the public. C and adventure audio the creators of the fuzz peaks pedal.
In some of my experiments, the cleanup was too good, at least for a soso player like myself revealed too much of my hamfisted clinks when playing. Free boss diagrams, schematics, service manuals schematics. The project is open source and aimed for hackers, musicians and programmers that want to learn about dsp digital signal processing, leds, guitar effects. So you have a ds 1 that you got for free in a craigslist trade, or real cheap as your first pedal. It is able to read the incoming audio signal and create effects on the four 8x8 led matrices. See more ideas about guitar pedals, diy guitar pedal and distortion. The ds 1 can be powered by a battery or an optional ac adaptor.
Perhaps one of the most popular pedals to modify is the boss ds 1. Boss diagrams, schematics and service manuals download for free. It generates the warm distortion of an overdriven tube amplifier while maintaining. The comet distortion project is a clone of the classic orange boss ds1 distortion, in continuous production since 1978. View and download boss ds 1 distortion instructions manual online. All components in the schematic below are labeled with the same labels as the commerciallyproduced product, so if you find new ds1 mods on the internet that reference component numbers on the commerciallyproduced ds1, they will be applicable to this circuit as well. Modifications i only recommend these modifications for the newest version of the boss ds1, which comes with the mitsubishi m5223al ic.
Boss dd6 schematic maintenance manual bossservice manuals. These are by far the most common clipping diodes, as seen in almost every other boss pedal, as well as tube screamers and pro co rats. Ill show you some sound examples and you make the decision for yourself. Boss ds1 the boss ds1 is probably one of the most famous distortion pedals in. Analog synths, combo organs, theremins, vintage keys, owners. This nextgeneration stomp combines over 35 years of innovation in pedal design with the most advanced technologies, bringing you a completely new tonal experience thats only. The arduino audio meter is a programmable guitar pedal that works with the arduino uno board. For the better part of 30 years, youve heard this orange box put through its paces on countless. Ds1 distortion project documentation comet distortion. I know at least a dozend different mods for the ds 1, so get as much information about this topic as possible before you start modding your fx. From the big name brands like boss and electroharmonix, to the lesserknown boutique effect pedal brands, such as big ear n. It includes thousands of templates and examples to help you get started quickly. The many modifications take it to a full metal jacket sound. I was able to find it in one of your pictures, but c11 doesnt seem to be labeled in your diagrams.
Boss ds 1 distortion stompbox boss sd 1 super overdrive stompbox tube screamer overdrive stompbox oberheim ps 1 phaser stompbox univox univibe modulations stompbox fender twin 1969 guitar amplifier. The ds 1 super mod takes the orange ds 1 distortion pedal, and gives it a professional makeover. Smartdraw is more than just easyit is also an incredibly powerful tool. Schematic diagram of the boss od 1 overdrive guitar pedal. It has the quad op amp circuit, not the dual op amp circuit with transistor buffers that the later versions have. Nearly all modders perform the same basic mods on the ds 1 circuit, so comparing the different mods first would be a good idea.
Before the ds 1, most distortion pedals produced harsh, buzzy tones and muddy sound at high gain settings. Stage one of this mod involves changing the clipping diodes, which are responsible for all of the distortion characteristics of the pedal. Known by professional guitarists the world over as that orange boss distortion, the ds 1 distortion is still in production to this day, thanks to its distinct growlingyetwarm tone and bite. Apr 10, 2018 boss ds 1 with keeley ultra mods got a request for the classic ds 1 with some keeley mods and since my earlier ds 1 layout doesnt have board mounted pots, it seemed like a good idea. Boss ds 1 distortion pedal distortion effects pedal for guitar, bass, and keyboard with distortion, level, and tone controls simply put, the boss ds 1 distortion pedal is a modern classic. Comparing the boss sd 1 with the ds 1 youtube youre using it wrong.