Synth & Eurorack Parts / DIY

Our Synth & Eurorack Parts / DIY category is a curated list of items that are commonly found in synth/eurorack projects. The items and filters here do not represent our full lineup of parts. If you don't see what you are looking for, check out our main categories or send us a suggestion and we'll look into adding it.
Switch - Carling, Mini Toggle, SPDT, 3 Position, Solder Lugs, Short Bat
Carling, SPDT mini toggle with short actuator, 3 positions, ¼" mounting hole diameter, 0.354" bushing length.
  • 0.354" bushing length
  • 3-Position On/Off/On
  • ¼" mounting hole diameter
  • Single pole/Double throw (SPDT)
  • Solder lugs
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Op-Amp - BA4560, Dual, General Purpose, 8-Pin DIP
The BA4560, is a dual operational amplifiers which achieves approximately twice the high output current of the BA4558, as well as featuring a higher slew rate of 4V / µs, a gain band width of 10MHz, and an improved frequency characteristic. 8-pin DIP package.
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Nut - CTS, 3/8-32, Nickel, for 450 Series Potentiometers
Replacement nut for CTS 450 series potentiometers and others.
  • 3/8-32 threading
  • Sold individually
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Panel - Eurorack Blanks, Reversible Black / Aluminum, 1.6mm
Aluminum blank panels for use with eurorack synths. These 1.6mm thick panels feature a painted black side and a bare aluminum side. Simply flip the panel around to match your color scheme. Elongated holes are used for the mounting holes to ensure a proper fit in your rack. These low cost panels are great for filling gaps in your system or making DIY modules. Blank panels are also referred to as blind panels. Standard Eurorack panels have the same height of 128.5mm but the width varies and is measured in HP. HP is short for horizontal pitch. A single HP is 0.2” (5.08mm). The 2HP panel will measure 0.4” wide (10.16mm”) and the 20HP panel will measure 4.0” wide (101.6mm).
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Heat Shrink - flame retardant polyolefin, 7.6mm unheated, black
Sold by the yard
Very flexible, high flame retardant polyolefin heat shrink tubing. Unheated outer diameter of about 7.6 mm with a 2:1 shrink ratio. Resistant to common liquid solvents with excellent physical, chemical, and electrical performance.
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Knob - Plastic, Set Screw, Small MXR Style, 0.75" diameter
Colors Available:
Small plastic knobs with set screw and brass insert. Similar to the small knobs used on many Dunlop / MXR pedals. These knobs have a fluted grip with an indicator line as well as a dot indicator on the skirt. Fits ¼” (6.35mm) pot shafts.
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StripBoard - Single Sided, 3.15” x 1.97”, Mounting Holes
Prototyping circuit board with a standard long strip pattern where tracks run the length of the board. The long tracks are convenient for power and ground rails, and for signal buses. Strips can be cut as needed to make smaller tracks and circuit pads and the board has 0.1" hole spacing for DIP integrated circuits/ headers as well as other parts. Higher quality than traditional stripboard, the holes are drilled, not punched.
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DSP Module - ABE, Accu-Bell Effector, 3 Adjustable Effects
The Accu-Bell Effector offers reverb, chorus, and delay with adjustable setting and tap tempo. This module runs on 5.5V to 9.5V DC so it is easy to incorporate into effect pedal builds. Please see the attached datasheet for an example schematic.
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Capacitor - 2000V, Ceramic Disc, ± 10%
Ceramic disc capacitors rated for up to 2kV, ± 10% tolerance.
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Op-Amp - LM741, Single, general purpose, 8-Pin DIP
LM741 single opamp in an 8-pin DIP package. The LM741 has been used in classic guitar pedals such as the Distortion Plus.
The LM741 series are general purpose operational amplifiers which feature improved performance over industry standards like the LM709. They are direct, plug-in replacements for the 709C, LM201, MC1439 and 748 in most applications. The amplifiers offer many features which make their application nearly foolproof: overload protection on the input and output, no latch-up when the common mode range is exceeded, as well as freedom from oscillations.
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Potentiometer - Song Huei, Center Notched, Linear, 9mm, Tall
Linear taper, vertical mount, Song Huei pots with a 6mm shaft and a notched center position sometimes called a center detent. These 9mm pots are popular in DIY guitar pedals, modular synthesizers, and other projects where space is limited. The knurled shaft features a painted indicator line so no knob is required. These tall versions have a 17mm shaft length and a total height of 25mm. For audio taper versions, see R-VSHL-AX. For standard linear taper versions, see R-VSHL-BX.
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Switch - Carling, Mini Toggle, SPDT, 3-Position, PC Pins
Carling mini-toggle switch, single pole/double throw, PC Pins. ¼" mounting hole diameter. 0.354" bushing length. 3-Position, On-Off-On.
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Transistor - 2N3906, TO-92 case, PNP, Lead Free
General purpose low-power PNP bipolar junction transistor, used frequently in hobbyist electronic projects. This version is lead free.
For a lead free 2N3904 see P-Q2N3904-LF.
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Regulator - 5 Volt, Linear Voltage Regulator
5V Linear Regulator. Used in MOD® kits. This fixed-voltage monolithic integrated circuit voltage regulator is suitable for applications that required supply current up to 100 mA.
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3.5mm Plug - Rean, cable mount, nickel-plated brass
High quality 3.5mm (1/8") plug. Features nickel plated brass contacts, with a nickel plated zinc shell. This plug uses a crimp strain relief for use with 4 mm O.D cables.
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3.5mm Jack - Qingpu, Eurorack, TRS, Switched, Panel or PC Mount
3.5mm TRS jacks with a switched tip found in many DIY Eurorack projects. These Qingpu Electronics jacks can be panel mounted with wires or more commonly PCB mounted. The PJ3410 jacks can be used for both mono and stereo signals. Hardware sold separately. See accessory items below.
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Reverb Module - Accutronics, Digi-Log, vertical mount, mini
A great digital reverb sound that easily replaces a spring reverberation unit. Stereo outputs may be summed for mono operation. Simple interface requires only input, output, +5V, and ground.
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Knob - Black, White Line, Silver Top, Set Screw, Boss Style
Black knob with white line, silver top, set screw and brass insert. Fits ¼" shaft with set screw. These Boss style knobs come in a variety of sizes. See P-K383X for an unskirted version.
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ProtoBoard - Fits 1590BB, 1 sided, 2-hole strips
Prototyping circuit board (PCB) designed to fit the Hammond 1590BB die-cast aluminum enclosure. It has a convenient 2-hole pattern, which provides an easy way to connect parts while maximizing usable board area. It can be used as a stand-alone prototyping board, or installed in a Hammond 1590BB enclosure. For fastening your project to a surface see our adhesive standoffs (S-H190-X). Features:
  • Single-sided high-quality FR4 glass-epoxy circuit board.
  • Convenient 2-hole pattern provides an easy way to connect parts.
  • 1oz/ft2 copper with an anti-tarnish coating for easy soldering.
  • 0.042" holes are drilled on 0.1" (2.54mm) centers. 4 mounting holes.
  • PCB Size 3.20 x 4.25 in (81.3 x 108.0 mm)
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Transistor - JFET, N-Channel, MMBFJ201, SOT-23
Surface mount MMBFJ201 JFET. Commonly used in place of the discontinued through-hole J201. These JFETs can be found in many effects pedals, synthesizers, and other projects. The MMBFJ201 is an N-Channel general purpose amplifier JFET. This device is designed primarily for low level audio and general purpose applications with high impedance signal sources.
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Transistor - 2N3904, TO-92 case, NPN
General purpose low-power NPN bipolar junction transistor, used frequently in hobbyist electronic projects.
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Washer - Flat, M3, Nylon, for Front Panels
Package of 10
Colors Available:
High quality nylon M3 flat washers. These durable washers fit perfectly on M3 threaded screws. The small outside diameter provides a clean look beneath the head of the screw. These are great mounting washers for preventing rack rash on front panels like Eurorack synths or any other use where the surface beneath the screw requires protection.
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IC Socket - Dual in-line package, 2.54mm Pitch, 7.62mm Spacing
IC component sockets for dual in-line package chips (DIP, PDIP, DIL, DIPP.) These sockets feature ladder style cases with tinned stamped and formed connections.
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Op-Amp - TL072, Dual, Low-Noise, JFET Input, 8-Pin DIP
The TL072 is a high speed JFET input dual operational amplifier incorporating well matched, high voltage JFET and bipolar transistors in a monolithic integrated circuit. The device features high slew rates, low input bias and offset current, and low offset voltage temperature coefficient.
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