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.
Potentiometer - Alpha, Linear, Knurled Shaft, Right Angle, 16mm, Dual, 10kΩ
10kΩ dual-gang 16mm potentiometers with a T18 knurled shaft and a linear taper. These pots have right angle PCB mount terminals. The smaller size is useful for builds with limited panel space such as guitar pedals, synthesizer modules, and adding modifications to equipment. Washer and nut included.
  • Threading: M7 x 0.75
  • Distance between terminals: 5 mm (0.197”)
  • Lead Depth from Panel: 10.7 mm + 5 mm (0.421” + 0.197”)
  • Lead Distance from shaft center: 16 mm (0.630”)
  • Lead Thickness: 0.5 mm (0.020”)
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Nut - Dress Nut, For Mini Toggle Switches
Colors Available:
Dress nuts for use with mini toggle switches. These plated dress nuts feature a chamfered edge for a professional look and work on any 1/4-40 UNS threaded bushing. Two sides are flatted for use with a tool when fastening.
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Potentiometer Adapter Sleeve - Converts 4mm shaft to 6mm
This nickel-plated steel adapter sleeve converts a 4mm shaft potentiometer to 6mm shaft, allowing for 6mm knobs to be used on a wider range of potentiometers. An additional 6mm to 6.35mm adapter R-VADAPT-25 can then be used to fit 1/4” knobs (sold seperately).
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Transistor Socket - Mill Max, 3 Pin, Machine Pin, Through Hole
High quality TO package transistor sockets by Mill-Max. These machine pin sockets make swapping transistors in pedals and other projects a simple process. These use a standard TO footprint so they are ready for use on PCBs with matching footprints.
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Knob - Plastic, Set Screw, Neve / Marconi Style, Wing, Skirted, 1” Diameter
Colors Available:
Plastic wing knobs with set screws and brass insert. These knobs are a close match for the classic knobs used on Marconi radios and Neve consoles. They feature an inlay indicator line. The grip diameter is 0.693 inches with a 1 inch clear skirt. Fits ¼” (6.35mm) pot shafts.
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Capacitor - 100V, Ceramic Disc, ± 10%
100 V ceramic disc capacitors. ± 10% tolerance.
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Transistor - BC558C, General Purpose, TO-92 case, PNP
The BC558 is a silicon general purpose PNP transistor in a TO-92 package. The BC558’s typical applications include signal processing, amplification, and switching.
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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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Header - Round Pin, 20 Position, Breakaway, 2.54mm Spacing
20 position male pin headers with a 2.54mm (0.1”) pitch. These headers use round pins that are smaller than the standard square type and are perfect for use with IC sockets, breadboards, and machine pin sockets. The breakaway construction makes fitting them to projects simple. Features:
  • Round Pin
  • 20 Position
  • 2.54mm Spacing
  • Breakaway
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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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Transistor - 2N4123, Silicon, TO-92 case, NPN
The 2N4123 is a general purpose silicon NPN transistor in a TO-92 case. The 2N4123 is primarily intended for general purpose amplification. It is a popular choice for silicon fuzz pedals due to its low hFE specifications.
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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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Switch - Carling, Mini Toggle, DPDT, 3 Position, Lugs, Short Bat
Carling mini-toggle switch, DPDT, 3 position, ¼" mounting hole diameter, 0.354" bushing length.
  • 0.354" bushing length
  • 3-Position
  • ¼" mounting hole diameter
  • Double pole/Double throw (DPDT)
  • Solder lugs
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Trimmer - Bourns, 3362P, Single Turn, Top Adjust, PCB Mount
High-quality Bourns 3362P trimpots. These single-turn cermet trimmers can be found in countless guitar pedals and synthesizer modules. Sealed trimmers are built with an o-ring seal to prevent entrance of moisture and serve as a mechanical restraint to prevent unwanted wiper movement. ±10% tolerance.
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Op-Amp - NJM5532, Dual, Low-Noise, 8-Pin DIP
The NJM5532 is a high performance dual low noise operational amplifier. Compared to the standard dual operational amplifiers, such as the NJM1458, it shows better noise performance, improved output drive capability, and considerably higher small-signal and power bandwidths. it is compensated internally for voltage follower circuit. This makes the device especially suitable for application in high quality and professional audio equipment, instrumentation, control circuits, and telephone channel amplifiers Features:
  • Operating Voltage = ±3V~±22V
  • Small Signal Bandwidth = 10MHz typ.
  • Output Drive Capability = 600Ω,10Vrms typ.
  • Input Noise Voltage = 5nV/√Hz typ.
  • Power Bandwidth = 140kHz typ.
  • Slew Rate = 8V/µs typ.
  • Bipolar Technology
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Transistor - 2N1711, Silicon, TO-39 case, NPN
The 2N1711 is a silicon planar epitaxial NPN transistor in a TO-39 metal case. It is intended for use in high performance amplifiers, oscillators and switching circuits. The 2N1711 is a great choice for amplifiers where low noise is an important factor.
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Capacitor - 25V, Radial Lead, Electrolytic
Package of 5
High quality, radial leaded, aluminum electrolytic capacitors rated at 25VDC.
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Knob - Davies, 1700, Daka-ware, Pinched
High-quality USA made knobs from Davies Molding. The Davies 1700 is made of solid phenolic and has a classic style that fits nicely on any piece of equipment. The 1700 can be found on vintage radios and amplifiers, most notably the Filmosound projector amps that are popularly converted to guitar amplifiers.
  • Height: 0.59 in.
  • Diameter: 0.75 in.
  • Fits ¼" shaft with set screw
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Nut - Round, for mounting Qingpu PJ3410 3.5mm jacks
Knurled, slotted nut for W-QP-PJ3410 3.5mm jacks.
See W-QP-NUT-PJ-H for the hex version of this nut.
See S-TND-2X for nut driver tool
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Nut - Dress Nut, Threaded Through, For Mini Toggle Switches
Threaded through dress nuts for use with mini toggle switches. Unlike the other versions of this dress nut, this nut is not capped allowing the nut to thread past the top of the switch’s bushing. The uncapped top can be useful where internal depth is an issue such as parallel PCB mounting. These plated dress nuts feature a chamfered edge for a professional look and work on any 1/4-40 UNS threaded bushing. Two sides are flatted for use with a tool when fastening.
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Op-Amp - LF356, Single, High Slew Rate, 8-Pin DIP
LF356 single op amp in an 8-pin DIP package. The LFx5x devices are the first monolithic JFET input operational amplifiers to incorporate well-matched, high-voltage JFETs on the same chip with standard bipolar transistors (BI-FET™ Technology). These amplifiers feature low input bias and offset currents/low offset voltage and offset voltage drift, coupled with offset adjust, which does not degrade drift or common-mode rejection.
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Potentiometer - Alpha, Linear, Solid Shaft, 16mm
16mm solid shaft linear potentiometers. These pots are great for any project. The smaller size is useful for builds with limited panel space such as guitar pedals, synthesizer modules, and adding modifications to equipment. Washer and nut included.
  • Threading: M7 x 0.75
  • Distance between terminals: 5 mm (0.197”)
  • Bushing Length: 6.5mm (0.256")
  • Shaft Diameter: 6.35mm ( 0.250")
  • Taper: Linear
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OTA - AS3080E, Linearizing Diodes, Alfa, 8-Pin DIP
The AS3080E is Alfa’s version of the CA3080 IC. The AS3080E is a gain block which is the operational-transconductance-amplifier (OTA). The AS3080E has differential input and a single-ended, push-pull, class A output. Amplifier bias
input may be used either for gating or for linear gain control. High output impedance and transconductance (gM) is directly proportional to the amplifier bias current (IABC). Linearizing diodes are provided at the inputs to reduce distortion and allow higher input levels. The result is a 10-dB signal-to-noise improvement referenced to 0.5 percent THD.
The AS3080E is notable for it’s high slew rate (50V/µs), which makes it especially useful for multiplexer and fast unity-gain voltage followers.
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Knob - Mini Indicator, Set Screw, 15mm x 11mm
Colors Available:
Mini fluted knob with infilled indicator line. Pairs well with the larger P-K850X. Fits ¼” (6.35mm) pot shafts.
  • Height: 11mm
  • Diameter: 15mm
  • Fits 1/4" shaft with set screw
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