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.
R-VADAPT-25 Potentiometer Adapter Sleeve - Converts 6mm or 18T shaft to ¼"
This brass adapter sleeve converts a 6mm shaft potentiometer or 18T knurled shaft potentiometer to 1/4" shaft (6.35mm), allowing for 1/4" knobs to be used on a wider range of potentiometers. 1/4" tall.
$0.53
S-HHN-M3 Nut - M3-0.5 Hex Nut, Stainless Steel
Package of 5
A threaded fastener made from austenitic stainless steels. It contains chromium creating an invisible surface film that resists oxidation making the metal corrosion resistant. If the surface layer is damaged, it rebuilds itself in the presence of oxygen.
$0.50
P-QMC78L05 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.
$0.50
P-H54-DRESS-X Nut - Dress Nut, For Mini Toggle Switches
Colors Available:
New!:
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.
Starting at $0.49
C-ETRX-50 Capacitor - 50V, Radial Lead, Electrolytic
Package of 5
High quality, radial leaded, aluminum electrolytic capacitors rated at 50VDC.
$0.49
P-QJ113 Transistor - J113, JFET, N-Channel,TO-92
J113 N-Channel Switch (TO-92 package) - designed for low level analog switching, sample and hold circuits and chopper stabilized amplifiers.
  • Max drain to gate voltage = 35 V
  • Max gate to source voltage = -35 V
  • Max forward gate current = 50 mA
$0.49
C-ETRX-25 Capacitor - 25V, Radial Lead, Electrolytic
Package of 5
High quality, radial leaded, aluminum electrolytic capacitors rated at 25VDC.
Starting at $0.49
P-QMPSA13 Transistor - MPSA13, Darlington 500mA 30V NPN
NPN Darlington transistor (TO-92 package) - designed for applications requiring extremely high current gain at collector currents to 1.0A.
  • Max collector to emitter voltage = 30 V
  • Max collector to base voltage = 30 V
  • Max emitter to base voltage = 10 V
  • Max collector current = 1.2 A (continuous)
$0.49
P-QJ201 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.
$0.45
R-C Resistors - ¼ Watt, Carbon Film, 5% tolerance
Package of 5
Carbon Film resistors are made by vacuum depositing a thin carbon film on a ceramic form. A good choice for applications which require a steady, low power drop. Package of 5. These resistors are perfect for pedal builders!
  • 1/4 watt
  • ± 5% tolerance
  • EIA color coded
  • .24" long x .08" diameter
  • Package of 5
$0.45
W-QP-419GR 3.5mm Jack - Qingpu, Eurorack, Stereo, PC Mount
PCB mounted 3.5mm stereo 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
S-M15 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.
$0.45
W-QP-518MA-BM 3.5mm Jack - Qingpu, Eurorack, Mono, Switched Tip, Snap-In, PCM
3.5mm TS jacks with a switched tip found in many DIY Eurorack projects. The WQP-WQP518MA-BM is the new improved version of the WQP-PJ301BM featuring Qingpu’s rugged square based bushing. The sleeve connection is through the outer bracket that snaps into place on the pcb allowing for easy construction and panel fitting. Hardware sold separately. See accessory items below.
$0.45
P-Q2N3906-LF 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.
$0.45
P-Q2N7000 Transistor - 2N7000, Mosfet, Small Signal
2N7000 N-channel enhancement mode field effect transistors. 2N7000 MOSFETs are used in many DIY projects such as boost and distortion effects pedals.
Features:
  • Voltage Controlled Small Signal Switch
  • High Saturation Current Capability
  • Rugged and Reliable
  • High Density Cell Design for Low RDS(ON)
$0.45
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.
$0.45
W-QP-518MA 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
P-H54-CAP-X Switch Accessory - Mini Toggle Caps
Colors Available:
Rubber caps / switch tips for mini toggle switches in a variety of colors. These are made for standard sized toggle bats.
Starting at $0.39
P-Q2N5089 Transistor - 2N5089, TO-92 case, NPN
General purpose low level, low noise amplifier. Silicon NPN transistor.
$0.39
P-Q1N5408 Diode - standard recovery rectifier, 3A, 1000V, 1N5408
1N5408 Diode. Lead mounted standard recovery rectifiers are designed for use in power supplies and other applications having need of a device with the following features:
  • High Current to Small Size
  • High Surge Current Capability
  • Low Forward Voltage Drop
$0.38
P-Q2N3904-LF Transistor - 2N3904, TO-92 case, NPN, Lead Free
General purpose low-power NPN bipolar junction transistor, used frequently in hobbyist electronic projects. This version is lead free.
For a lead free 2N3906 see P-Q2N3906-LF.
$0.35
On Backorder
R-VC-NUT 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
$0.35
P-Q1N5404 Diode - Silicon Rectifier, 3A, 400V, 1N5404
A semiconductor device which passes current in the forward direction(from anode to cathode), and blocks current in the opposite direction.
$0.35
C-PEI Capacitor - 100V, Polyester Film Inductive
Package of 5
Polyester film dielectric, aluminum foil electrode, copperply leads and epoxy resin coating in inductive type.
  • Small size, light weight and low cost
  • Dissipation factor is small because the leads are directly welded to electrodes
  • Epoxy resin vacuum-dipped enhances the mechanical strength, humidity resistance
  • 100 volt rating
  • Operating temperature range: -40°C to +85°C.
  • Package of 5
Starting at $0.35
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