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-KEY-FELT Felt Strip - 51.5", for Korg & Yamaha Keyboards
For Yamaha DX7, DX7 II, FX20, Korg M1, Trinity and T Series.
P-K285PS-W Knob - Rogan, PT Series, 5PS, Wide, Skirted, Pointer, D-Shaft
High-quality USA made knobs from Rogan Corp. These large, puck-shaped, skirted pointer knobs from Rogan’s PT Series feature a soft rubber grip molded over a solid polymer knob. PT Series knobs can be found on synthesizer modules from Make Noise, Mutable Instruments and others. Fits 6mm D-shafts.
  • Height: 0.45 in.
  • Diameter: 0.84 in
  • Fits 6mm D Shafts
  • Indicator on round side of D-shaft

A variety of different sizes are available from the PT Series.
P-QLM386NX Audio Power Amplifier - LM386N-1 / 4, Low Voltage
LM386 Low Voltage Audio Power Amplifier The LM386 is a mono low voltage amplifier that can be used in a variety of applications. It can drive loads from 4 Ω to 32 Ω. The gain is internally set to 20 but it can be modified from 20 to 200 by placing a resistor and capacitor between pins 1 and 8. As this is an Op Amp it can be used in different configurations to fit in several applications. The internal gain setting resistor allows the LM386 to be used in a very low part count system. In addition a series resistor can be placed between pins 1 and 5 to modify the gain and frequency response for specific applications. These are found in many small audio amplifiers and even tiny pedal sized guitar amplifiers! There are tons of possibilities for this little Op Amp.
R-VAM20KW-SS-PCL Potentiometer - Alpha, W-Taper, Solid Shaft, Right Angle, 16mm, 20kΩ
20kΩ W taper Alpha 16mm pots with a solid shaft and right angle PC 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”)
  • Shaft Diameter: 6.35 mm (0.25”)
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.
W-QP-518MA-BLK-X 3.5mm Jack - Black Hardware, Eurorack, Mono, Switched Tip, PC Mount
Black PCB mounted 3.5mm mono jacks commonly found in DIY Eurorack projects. These jacks feature black hardware with a matching black nut. They also use a square bushing plate for added durability. Mounting nut is included.
R-VAV-A100K-11DET Potentiometer - Alpha, Audio, 9mm, Vertical, 11 Detents, 100K
Audio taper, vertical mount, Alpha pots with a 6.35mm shaft diameter featuring 11 detents across the rotation. The 11 detent versions are useful for builds where 1-10 settings are commonly used or if the pot is used as a rotary switch along with a microcontroller. These 9mm pots are popular in DIY guitar pedals, synthesizers, and other projects. Mounting nut and washer included. See R-VAV-BX-11DET for linear taper versions.
P-QLM311 Comparator - LM311, Single, High Speed, 8-Pin DIP
LM311 single comparator IC in an 8-pin DIP package. The LM311 device is a single high-speed voltage comparator. These devices are designed to operate from a wide range of power supply voltages, including ±15-V supplies for operational amplifiers and 5-V supplies for logic systems. The output levels are compatible with most TTL and MOS circuits. These comparators are capable of driving lamps or relays and switching voltages up to 50 V at 50 mA. All inputs and outputs can be isolated from system ground. The outputs can drive loads referenced to ground, VCC+ or VCC−. Offset balancing and strobe capabilities are available, and the outputs can be wire-OR connected.
P-L400 LED Bezel - with included 3mm Red LED
Bezel Assembly with 3mm Red LED. Required hole size: 0.25". Washer and hex nut included. LED Specifications: Color Red Lens Diam 3 mm Overall Height 5.4 mm Lens Type Diffused Luminous Intensity Min. 3.6 mCd @If (test) 10 mA Wavelngth (Peak) 568 nm V(FM) Max.(V) Forward Voltage 2.7 V @I(F) (test) 10 mA Min Operating Temp -30° Max Operating Temp 80°
P-Q2N5458 Transistor - 2N5458, JFET, N-Channel,TO-92
2N5458 N-channel JFET in a TO-92 package. The 2N5458 is an N−channel junction field effect transistors, depletion mode (Type A), designed for audio and switching applications. Features
  • N−Channel for Higher Gain
  • Drain and Source Interchangeable
  • High AC Input Impedance
  • High DC Input Resistance
  • Low Transfer and Input Capacitance
  • Low Cross−Modulation and Intermodulation Distortion
S-HS-M3-6-X Screw - M3, Painted, Combination Head, Binding, 6mm
Colors Available:
Combination Drive, Colored Head Binding Screws, 6mm, M3, 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.
package of 5
P-PC-SOT23-123 PCB - SMD to Thru-Hole Adapter, SOT-23 to TO-92, 123 Pinout
PCB for converting SMD SOT-23 transistors and FETs to through hole footprints. This adapter board fits SOT-23 packages. Solder the device to this PCB then attach wires or pin headers (sold seperately) to connect to through hole footprints on PCBs or breadboards. The white box on the PCB can be used to label the part with a marker. See image below for pinout.
package of 5
P-QNE5532P Op-Amp - NE5532, Dual, Low Noise, Audio, 8-Pin DIP
NE5532 dual op amp in an 8-pin DIP package. The NE5532 device is a high-performance operational amplifier combining excellent DC and AC characteristics. They feature very low noise, high output-drive capability, high unity-gain and maximum-output-swing bandwidths, low distortion, high slew rate, input-protection diodes, and output short-circuit protection. These operational amplifiers are compensated internally for unity-gain operation. These devices have specified maximum limits for equivalent input noise voltage. Features
  • Equivalent Input Noise Voltage: 5 nV/√Hz Typ at 1 kHz
  • Unity-Gain Bandwidth: 10 MHz Typ
  • Common-Mode Rejection Ratio: 100 dB Typ
  • High DC Voltage Gain: 100 V/mV Typ
  • Peak-to-Peak Output Voltage Swing 26 V Typ With VCC± = ±15 V and RL = 600 Ω
  • High Slew Rate: 9 V/μs Typ
P-RKBTSE-16FX Multi Processor Module - Belton, BTSE-16FX
The BTSE-16FX Effect board provides 16 different digital audio effects to be used for mixers or other audio applications that require sound enhancement. Equipped with the superb quality digital effects processing engine which it adds that extra punch needed to make audio presentations truly stand out.
P-Q2N527 Transistor - 2N527, Germanium, TO-5 case, PNP
2N527 PNP germanium transistors. The 2N527 is a popular PNP for fuzz pedals and other effects. It can be found in modern classics such as the Sunface and Benson Fuzz. This transistor is in a TO-5 package with long leads commonly found on germanium transistors.
W-QP-NUT-K Nut - Knurled, for mounting Qingpu 3.5mm jacks
Knurled, slotted nut for W-QP-419GR and W-QP-518MA 3.5mm jacks. See W-QP-NUT-H for the hex version of this nut. See W-QP-WASHER for compatible washer See S-TND-2X for nut driver tool
P-QOA74A Diode - OA74A, Amperex, Germanium, Black Glass
NOS OA74A germanium diodes from Amperex. OA74A diodes were used in many vintage electronics and also make for great clipping diodes in stompbox effects pedals. The red end is the cathode. OA74A is a near-exact replacement for OA81.
P-QFXCORE Integrated Circuit - Experimental Noize FXCore, DSP, Multi-Effect / Reverb
FXCore from Experimental Noize is a DSP designed for creating audio effects in pro-audio devices. FXCore can operate as a standalone device when paired with appropriate CODECs where it generates all necessary clocks or as part of a more complex system where it will lock to the word clock and bit clock provided by another part of the system.
FXCore can store up to 16 programs and their associated register preset values in its internal FLASH memory so no external program storage is required.
P-QJ201-SLX Transistor - J201, Siliconix, JFET, N-Channel, TO-92
J201 N-Channel JFET in a TO-92 package made by Siliconix. The J201 is designed primarily for low level audio and general purpose applications with high impedance signal sources.
  • Max drain to gate voltage = 40 V
  • Max gate to source voltage = -40 V
  • Max forward gate current = 50 mA
P-Q2N1303 Transistor - 2N1303, Germanium, TO-5 case, PNP
2N1303 PNP germanium transistors. The 2N1303 is a popular PNP for fuzz pedals and other effects. This transistor is in a TO-5 package with long leads commonly found on germanium transistors.
R-VAMXA Potentiometer - Alpha, Audio, Knurled Shaft, 16mm
Miniature Alpha pot for guitars. Audio taper.
P-Q2N4401 Transistor - 2N4401, Silicon, TO-92 case, NPN
The 2N4401 is a silicon general purpose NPN transistor in a TO-92 package. The 2N4401’s typical applications include signal processing, amplification, and switching.
P-QLF353 Op-Amp - LF353, Dual, Wide-Bandwidth, JFET Input, 8-Pin DIP
Dual wide-bandwidth LF353 opamps in an 8-pin DIP package. The LF353 offers a high input impedance and 3MHz bandwidth.
This LF353 device is a low-cost, high-speed, JFET input operational amplifier with very low input offset voltage. It requires low supply current yet maintains a large gain-bandwidth product and a fast slew rate. In addition, the matched high-voltage JFET input provides very low input bias and offset currents.
P-K386X Knob - Pointer, Small, Knurled, 0.675” Diameter
Colors Available:
This vintage knob design has been used on numerous boutique pedals. These classy knurled pointer knobs feature a slotted set screw, and fit ¼" solid shaft potentiometers. These are a close match to the Davies 1400.
  • Height: 0.43 in.
  • Length: 0.825 in.
  • Fits ¼" shaft with set screw
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