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.
Transistor - 2N3904, TO-92 case, NPN
General purpose low-power NPN bipolar junction transistor, used frequently in hobbyist electronic projects.
$0.18
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.
Starting at $1.35
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)
$5.50
Nut - Dress Nut, For Mini Toggle Switches
Genuine Carling Technologies dress nuts for use with Carling 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.
$0.49
Starting at $0.20
Potentiometer - Alpha, Linear, Solid Shaft, 16mm
16mm solid shaft linear potentiometers. These pots are a 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”)
  • Busing Length: 6.5mm (0.256")
  • Shaft Diameter: 6.35mm ( 0.250")
  • Taper: Linear
$1.25
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.
Starting at $0.15
Op-Amp - NE5532, Dual, Low-Noise, 8-Pin DIP
This 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
$1.15
Capacitor - 25V, Radial Lead, Electrolytic
Package of 5
High quality, radial leaded, aluminum electrolytic capacitors rated at 25VDC.
Starting at $0.49
Integrated Circuit - Spin FV-1, DSP, Multi-Effect / Reverb
The Spin Semiconductor FV-1 is a complete reverb solution in a single IC. With integrated stereo ADC and DACs, the FV-1 can be treated like any other analog component in your product's signal path. The FV-1 can access a total of 16 programs, 8 are built into the internal ROM and the designer may elect to connect a serial EEPROM with 8 additional programs. By using an external EEPROM, the designer can distinguish his product from others by creating a custom program set without the need for a microprocessor in the system. With 3 potentiometer inputs, programs may have real time variable parameters such as decay time in a reverb, rate and depth in a chorus or frequency in a filter. These inputs are available as coefficients to your program and may be used independently of each other. The rich instruction set allows users to program effects of all kinds. With instructions like LOG and EXP, users can easily program audio expansion and compression routines.
$17.50
Transistor - BC550 B, TO-92 case, NPN
Low noise transistor for audio frequency amplifier applications.
$0.19
Knob - Scalloped Edge, Indicator Line, Set Screw
Colors Available:
Set screw knob with indicator line and scalloped edge. Measures .50" in diameter and .6" in height. Davies 1900H clone
$1.45
PadBoard - Double Sided, Plated Holes, 3.15” x 1.97”
Prototyping circuit board that has a general purpose pad-per-hole pattern making it great for general purpose analog and digital use. It is a double-sided board with plated holes, which allows components to be easily soldered to either side of the board. A square pad is provided every 5th hole, which makes it easy to align components on the top and bottom of the board. An anti-tarnish coating protects the copper for a long shelf-life and provides easy soldering.
For fastening your project to a surface see our adhesive standoffs (S-H190-X)
Features:
  • Pad-per-hole prototyping board with plated-thru holes. A square pad every 5th hole makes it easy to align components on top and bottom.
  • Double-sided high-quality FR4 glass-epoxy circuit board with plated holes. Components can be soldered to either side.
  • 1oz/ft2 copper with an anti-tarnish coating for easy soldering.
  • 31 x 19 holes, 0.037" holes are drilled on 0.1" (2.54mm) centers. Four 0.125” mounting holes.
  • Size 1 = 1.97 x 3.15in (50 x 80mm), 1/16" thick (1.6mm)
$2.95
Switch - Carling, Mini Toggle, DPDT, 2-Position, PC Pins
0.354" bushing length. 2-Position On/On. ¼" mounting hole diameter. Double pole/Double throw (DPDT). PC mount pins.
$2.75
Transistor - 2N6027 Programmable Unijunction
2N6027 programmable unijunction transistor often referred to as a PUT. The 2n6027 can be found in many tremolo effects pedal projects.
$1.45
LED Bezel - for 3mm LED, used for mounting
Holder for mounting LEDs to panels.
$0.65
Capacitor - 500V, Ceramic Disc, ± 10%
Radial ceramic capacitor.
  • Voltage rating: 500VDC
  • Tolerance: ± 10%
Starting at $0.25
3.5mm Jack - Qingpu, Eurorack, Mono, Switched Tip, PC Mount
PCB mounted 3.5mm mono jacks commonly found in DIY Eurorack projects. These are the newest version from Qingpu Electronics featuring a square bushing plate for added durability. Hardware sold separately. See accessory items below.
$0.45
Op-Amp - TL074, Quad, Low-Noise, JFET Input, 14-Pin DIP
Low noise JFET quad operational amplifier. Incorporates well matched, high-voltage JFET and bipolar transistors in a monolithic integrated circuit. Features high slew rates, low input bias and offset currents, and low offset voltage temperature coefficients. Features:
  • Wide common-mode and differential voltage range
  • Low input bias and offset current
  • Low noise en = 15 nV/HZ
  • Output short-circuit protection
  • High input impedance JFET input stage
  • Low harmonic distortion: 0.01%
  • Internal frequency compensation
  • Latch up free operation
  • High slew rate: 16 V/us (typical)
$1.32
Integrated Circuit - PT2399, Echo / Delay
PT2399 echo/delay chip used in many DIY and commercial pedals. The PT2399 is in a DIP 16 package. Minimal external components are required for use and delay time is set with resistance.
$1.59
Screw - M3, Phillips, Pan Head, Machine
Package of 5
Phillips panhead machine screw, M3 metric, zinc. Designed to go through a hole or nut that is pre-tapped to form a mating thread for the screw. Phillips drive is the most common drive used and is designed to "camout" when the screw reaches optimum tightness, thus preventing damage to the screw head.
See S-HS-M3-6-X for colored 6mm M3 screws.
Starting at $0.75
Key Contacts - Korg, Rubber, for Keyboards
For N364 and X5, 5 are required. for N264, 2 are needed. May be cut. Sold individually. These are also used in the Kurzweil MK (MARK)-Series of electronic pianos.
$5.50
Switch - Carling, Mini Toggle, SPDT, On-On, PC Mount, right angle
Genuine Carling 2 Position Mini Toggle, On-On, Short Round Bat, Right Angle, PC Mount Features:
  • SPDT ( Single Pole/ Double Throw) On-On switch
  • 0.275" bushing length
  • 0.270” bat length
  • ¼" chassis hole diameter
  • Right angle, PC Mount terminals

Note: On-On switches may sometimes be referred to as On-None-On.
$2.50
Nut & Washer - Panel, for ⅜" Potentiometers and Jacks
Package of 100
Replacement nut and washer for pots and jacks that feature a ⅜" bushing with 3/8-32 threading. Sold in packs containing 100 nuts and 100 washers.
$25.00