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.
P-Q-SSI2164 Integrated Circuit - SSI2164, Quad VCA, Sound Semiconductor
The FatKeys™ SSI2164 is perhaps the most flexible VCA available, with four independent channels for lowest cost-per-VCA. The user-selectable mode control allows Class A, AB, or intermediate biasing, and current inputs and outputs provide great design freedom. Ideal for voltage-controlled filters. The SSI2164 is a versatile VCA building block for high-performance audio applications. Four independent channels provide voltage control of current-mode inputs and outputs for a gain range from +20dB to –100dB, with control provided by a ground-referenced –33mV/dB constant. The SSI2164 will directly retrofit existing SSM/V2164 positions while offering improvements that include significantly lower overall distortion, on-chip protection against asymmetrical power failure, and a substantial increase of input current handling. The device offers considerable flexibility for a wide range of design goals and applications.
$6.95
P-Q-SSI2130 Integrated Circuit - SSI2130, VCO, Sound Semiconductor
The FatKeys™ SSI2130 Voltage Controlled Oscillator provides beautiful triangle, sawtooth, pulse, and square waveforms with unprecedented temperature stability; and adds an on-chip mixer, low distortion sine wave generator, through-zero FM/PM capability and more in an ultra-compact PCB footprint.
$8.95
P-Q-SSI2144 Integrated Circuit - SSI2144, Ladder VCF, Sound Semiconductor
The second of two legendary SSM filter updates, the FatKeys™ SSI2144 is a dedicated four-pole low-pass ladder filter with on-chip resonance control. Original designer Dave Rossum did a number of performance updates such as lower noise, improved control feedthrough, and logical pin grouping but otherwise left this sweet-sounding VCF alone. The SSI2144 reprises the SSM2044 of legacy chipmaker Solid State Micro Technology, which many believe to be the best-sounding analog synthesis filter IC ever produced. Based on Dave Rossum’s patented classic improved ladder topology, the SSI2144 allows rich tonal characteristics that showcase the very best attributes of subtractive synthesis. The SSI2144 uses the same internal circuit as the SSM2044 but incorporates improvements by the original designer and takes advantage of modern process technology.
$6.50
P-Q-SSI2162 Integrated Circuit - SSI2162, Dual VCA, Sound Semiconductor
The FatKeys™ SSI2162 provides two independent VCA channels, and like its SSI2161 and SSI2164 siblings offers great flexibility in design of dynamics processors, automatic or remote level control, and voltage controlled filters. Highly compact 10-lead SSOP package. The SSI2162 is a versatile VCA building block for high-performance audio applications. Two independent channels provide voltage control of a current-mode input and output for a gain range from +20dB to –100dB, with control provided by a ground-referenced –33mV/dB constant. The device offers considerable flexibility for a wide range of design goals and applications. A unique mode control allows selection of Class A, Class AB, or in-between using a single resistor. In addition, improved current handling allows use of lower value input resistors for reduced output noise without loss of headroom. Both channels can be parallel-connected for further noise improvement.
$5.45
P-QMC7805 Regulator - 7805, 5 Volt, 1A, Linear Voltage Regulator
5V linear regulator with up to 1 amp of current in a TO-220 package. This style of regulator can be found in many power supplies and also modular synth circuits as well as some stomp boxes. These voltage regulators are monolithic integrated circuits designed as fixed−voltage regulators for a wide variety of applications including local, on−card regulation. These regulators employ internal current limiting, thermal shutdown, and safe−area compensation. With adequate heatsinking they can deliver output currents in excess of 1.0 A. Although designed primarily as a fixed voltage regulator, these devices can be used with external components to obtain adjustable voltages and currents.
$0.65
R-VAV-BX Potentiometer - Alpha, Linear, 9mm, Vertical
Linear taper, vertical mount, Alpha pots with a 6.35mm shaft diameter. These 9mm pots are popular in DIY guitar pedals, synthesizers, and other projects. Mounting nut and washer included.
$1.85
R-VAV-AX Potentiometer - Alpha, Audio, 9mm, Vertical
Audio taper (log), vertical mount, Alpha pots with a 6.35mm shaft diameter. These 9mm pots are popular in DIY guitar pedals, synthesizers, and other projects. Mounting nut and washer included.
$1.85
W-SC-112AX ¼" Jack - Switchcraft, Enclosed, Mono, Shunt Tip
The Switchcraft Type 112A enclosed ¼” jack is a high quality jack featuring a switched tip. This jack has three solder lugs. One for the tip, one for the sleeve, and one for the switch which connects to the tip when no plug is inserted. These jacks have been widely used across the industry and can also be found in many popular 5U synthesizers. Includes nut and washer
  • Type 112AX
  • 0.276" bushing length (standard)
  • Mates with standard ¼" plugs and is available with 0.25" inside diameter bushing.
  • Mono 2-Conductor
  • Includes nut and washer
  • Tip is shunt
$2.39
P-PANEL-EU-X 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).
Starting at $2.35
S-HSO-M3-X Standoff - M3, Male-Female, Aluminum, 5.5mm Diameter
  • Finish/Plating: Clear Iridite
  • Material: Aluminum
  • OD: 5.5mm
  • Shape: Hex (Metric)
  • Style: M-F Standoff
  • Thread Depth(D): 8mm
  • Thread Length (TL): 8mm
  • Thread: M3
  • Type: Threaded Standoffs
Starting at $0.60
P-KORG-MIC Microphone Condenser - Korg, EM197K
Korg condenser microphone EM197K, used on the Korg MicroKORG.
$28.00
On Backorder
P-RBTSE-99FX DSP Module - Accutronics, 99 Effects (Reverb, Chorus, Delay, +)
The BTSE-99FX Effect board provides 99 different digital audio effects to be used in many audio applications that require sound enhancement. Equipped with a superb quality digital effects processing engine which adds that extra punch needed to make sounds truly stand out. Applications:
  • Guitar/ Keyboard/Bass amplifiers and combos
  • Audio mixing consoles / Powered mixing consoles
  • Stand -alone stereo effect units for studio and PA usage
  • Effects pedals
$32.00
P-Q1N474X Diode - Zener, 1W, 1N4741A, 1N4748A
A semiconductor device that, above a certain reverse voltage(the zener value) has a sudden rise in current. If forward biased, the diode is an ordinary rectifier. When reverse biased, it exhibits a sharp break in its current-voltage graph. Voltage across the diode remains essentially constant for any further increase of reverse current.
$0.20
P-ECB-67 Knob - Dunlop, MXR, small knurled, aluminum
Genuine Dunlop replacement small knurled knob for MXR pedals. Push -on style knob designed for use with coarse knurled shafts.
$2.25
W-QP-WASHER Washer - Flat, for use on Qingpu Jacks
Flat washer for W-QP-419GR and W-QP-518MA 3.5mm jacks.
$0.07
R-VNUT-38 Nut & Washer - Panel, for ⅜" Potentiometers
Replacement nut and washer for pots with a ⅜" bushing diameter.
$0.70
P-QLM324 Op-Amp - LM324, Quad, Low-Power, 14-Pin DIP
Quad low-power opamps in an 14-pin DIP package. The LM324 offers a 1MHz bandwidth and can be powered from a single supply.
$0.18
S-M12-1080 Heat Shrink - Assorted Diameters, 6" Long, 23 Pieces
Package of 23
The shrink ratio on this tubing is 2 to 1, it is fungus resistant and non-corrosive. It is recommended for tightly sealing connectors, terminals, wire splices, and tool handles as well as weather-proofing wire repairs. It may be shrunk with heat guns, oven, etc. Comes in 6 inch lengths.
$5.75
S-HS-BTN-X Screws - M3-0.5 Button-Head Socket Cap, 8mm Long
Package of 5
Colors Available:
Button-Head Socket Cap Screws - Class 10.9, ISO 7380 Coarse Thread. Used when a wider bearing surface or smoother, more finished appearance is desired.
Starting at $0.75
P-Q1N400X Diode - General purpose rectifier, 1A, 1N400X
A semiconductor device which passes current in the forward direction (from anode to cathode), and blocks current in the opposite direction.
Starting at $0.15
R-N Resistors - ¼ Watt, Metal Film, 1% tolerance
Package of 5
Metal Film resistors consist of a resistive element of an extremely thin layer of metal alloy vacuum deposited on a substrate. Precise and quiet. Package of 5. These resistors are perfect for pedal builders! 1/4 watt.
$1.80
R-VAMA-SS-PCL Potentiometer - Alpha, Audio, Solid Shaft, Long PC Lead, 16mm
Alpha Mini Pots with solid shaft and long PC mount terminals.
  • 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”)
$1.10
P-H5410 Switch - Carling, Mini Toggle, DPDT, 2 Position, Solder Lugs, Short Bat
Carling mini-toggle switch, DPDT, 2 position, ¼" mounting hole diameter, 0.354" bushing length.
$2.75
On Backorder
R-VTL5C1 Optocoupler - VTL5C1, Vactrol, for Channel Switching
VTL5C1 vactrols for use in amplifiers, effect pedals, synthesizers and more. The VTL5C1 was commonly used for channel switching circuits in amps made by Crate and others.
$7.95
Don't see what you're looking for? Send us your product suggestions!