Project · Boosters & Volume
Buffer (Integrated Circuit Based)
These buffers can be used in standalone boxes, or can be integrated into a Splitter Box, A/B stompbox, A/B/Y stompbox or on the front end of any unbuffered stompbox you have. If used for signal splits, they will keep each part of the signal split clear and full.
Single IC Buffer This is a simple IC Buffer you can build with just a few parts. Thanks to Jack Orman at AMZ and improvements posted by Dirk Wacker at Single Coil.com (almost at the bottom of the page is: Buffer PDF )
Project files
Everything you need to build it
IC Buffer Ready-For-Transfer Printed Circuit Board Layout
IC Buffer Project Revisions History
Dual IC Buffer Ready-For-Transfer Printed Circuit Board Layout
Schematic
Schematic
Parts layout
Parts Layout / Wiring Diagram
What you will need
Bill of Materials
Version 2009June18 · Copyright 2009 JD Sleep · Permission refused for posting/serving this file from any site other than www.generalguitargadgets.com · Trademarks are property of their owners
Resistors
| Resistor ID | Value | 3-band Marking | 4-band Marking |
|---|---|---|---|
| R1 | 2M2 (2.2 M) | red-red-green | red-red-black-yellow |
| R2 | 2M2 (2.2 M) | red-red-green | red-red-black-yellow |
| R3 | 1k | brown-black-red | brown-black-black-brown |
| R4 | 2M2 (2.2 M) | red-red-green | red-red-black-yellow |
Capacitors
| Capacitor ID | Value | Type | Possible Marking |
|---|---|---|---|
| C1 | 0.1µF | Film | 104 |
| C2 | 10µF | Aluminum Electrolytic, or Tantalum | 10µF |
Other
| Part ID | Part Name |
|---|---|
| IC1 | TL071 (or similar opamp) |
| D1 (optional) | 1N914 (or similar Silicon diode) |
| D2 | LED (status indicator) |
| J1 | Stereo quarter-inch jack |
| J2 | Mono quarter-inch jack |
| J3 | DC Jack |
| B1 | 9 volt battery |
| Sw1 | Heavy Duty 3PDT foot switch Printed Circuit Board, 9v battery snap, 24 gauge stranded wire, Enclosure, Knob |
How to build it
Instructions
IC Buffer Instructions
Version 2011December24 · Copyright 2009 JD Sleep · Permission refused for posting/serving this file from any site other than www.generalguitargadgets.com · Trademarks are property of their owners
Thanks to Jack Orman at http://www.muzique.com and improvements posted by Dirk Wacker at http://www.singlecoil.com/tb-strip/tbstrip.html (almost at the bottom of the page is http:www.singlecoil.com/tb-strip/buffer.pdf The schematic and layout show wiring for a fully implemented stand-alone stompbox buffer with true bypass. This project can also be integrated into existing stompboxes or effects. R4 is an optional pull down resistor to possibly prevent switch click due to voltage build up. The schematic shows an optional power protection diode (D1). Here's an inside view of the unit we built to give you some general ideas if needed.
Comments and questions are welcome and can be sent to [email protected]
Dual IC Buffer Instructions
Version 2014July27 · Copyright 2013 JD Sleep · Permission refused for posting/serving this file from any site other than www.generalguitargadgets.com · Trademarks are property of their owners
- This is an implementation of the IC Buffer that we have, but contains two identical
- buffers on a single PCB. We did this to consolidate and save a lot of wiring and
- space when you have a need for two or more buffers in the same enclosure.
- Here are some of the options available with this PCB:
- It can be used with one input and two outputs as a splitter with both outputs
- separately buffered
- It can be used with two input and two outputs to buffer two completely
- independent signal chains.
- Two of the PCBs can be used to build a 4-way splitter as the photo above
- shows.
- There are two on-board LED current-limiting resistors that can be used in a
- buffered switching box (with indicator LEDs). These can be connected to
- ground or 9v+ depending on your switching needs. This feature will also
- eliminate some tedious off-board wiring. This is used in the buffered ABY
- switch box pictured above.
- The resistors all stand on-end as shown in the photos below. It is very easy to build.
- Use the wiring diagram examples on this project page or create you own customized
- uses!
- Note: The screen print on The first run of PCBs has pad O1 and O2 labels
- reversed. Follow the layout diagrams if you are building a version that has two
- inputs.
- Here's an inside view of the units we built to give you some general ideas if needed.
Comments and questions are welcome and can be sent to [email protected]
More about this project
Notes, sounds and related links
Dual IC Buffer Here is a IC based Buffer PCB with two independent buffers on the PCB. You can split one input into the two buffers or have two inputs and two outputs (independent of each other).
What does a Buffer do?
Your "signal chain" is everything between your guitar and amplifier input, including cables. As your signal chain gets more complex (adding more stompboxes and patch cables) you may start to notice a loss of treble in your guitar sound. Your sound may sound much more dull than it does when you plug guitar straight into the amp with a short cable. Check out this Information about Impedance and Buffers for some information on why this happens.
This Pete Cornish Case against True Bypass Article may do something to explain why a little buffer stompbox may be something useful to you. I believe there is also "A Case for True Bypass" as well, but the article might give you a good idea of what a buffer can do in your signal chain.
Please note that almost all Boss™, some Ibanez™ and some other commercial pedals use a non-bypassed buffer. This means if you have a Boss™ pedal in your signal chain, then you probably already have a buffer in signal path even when the pedal is in bypass mode.
Ready to build? We have the kit.
Buy a Single Buffer Complete Kit. Includes all the parts and materials you need to build one, all for about the price you would pay for a PCB and parts.
Buy a Dual Buffer Complete Kit. Includes all the parts and materials you need to build one, all for about the price you would pay for a PCB and parts.
Would you like a Ready to Solder Circuit Board for the Single IC Buffer project? (scroll down for a link to buy the Dual Buffer IC)
Would you like a Ready to Solder Circuit Board for the Dual IC Buffer project?