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.
Resistor - PR01, Vishay BC, 1 Watt, Power Metal Film
High quality metal film resistors from Vishay / BC Components. PR01 resistors are rated for 1W but have a compact 2.5x8mm package. These resistors look great in vintage and vintage-style builds and have been used in high-end Marshall amplifiers and other audio equipment. Construction: A homogeneous film of metal alloy is deposited on a high grade ceramic body. After a helical groove has been cut in the resistive layer, tinned connecting wires of electrolytic copper or copper-clad iron are welded to the end-caps. The resistors are coated with a red, non-flammable lacquer which provides electrical, mechanical and climatic protection. This coating is not resistant to aggressive fluxes and cleaning solvents.
package of 5
Please Log In to view prices
Knob - Plastic, Knurled Shaft, 808 Style
Black textured plastic knobs with orange infilled indicator lines similar to the original knobs found on Roland TR-808 drum machines.These knobs feature a straight knurled grip. The large and medium sizes both have a skirt with a notched indicator. All sizes fit 6mm T18 knurled pot shafts.
Please Log In to view prices
Transistor - MPSA18, Low Noise, 200mA 45V NPN
NPN low noise transistor (TO-92 package) - designed for high gain, low noise general purpose amplifier applications.
  • Max collector to emitter voltage = 45 V
  • Max collector to base voltage = 45 V
  • Max emitter to base voltage = 6.5 V
  • Max collector current = 0.2 A (continuous)
Please Log In to view prices
Reverb Module - Accutronics Belton, Digi-Log, Adjustable Decay
A great digital reverb sound that easily replaces a spring reverberation unit. Stereo outputs may be summed for mono operation. Simple interface: input, output, +5V, and ground
Please Log In to view prices
Transistor - 2N4125, Silicon, TO-92 case, PNP
The 2N4125 is a general purpose silicon NPN transistor in a TO-92 case. The 2N4125 is primarily intended for general purpose amplification. It is a popular choice for silicon fuzz pedals due to its low hFE specifications. It has also been used in a variety of classic pedals such as the Phase 90.
Please Log In to view prices
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.
Please Log In to view prices
Heat Shrink - Assorted Diameters, 2.5" Long, 158 Pieces
2 to 1 heat shrink tubing variety pack. This pack includes six different diameters ranging from 1/16” to 1/2”. Each piece is 2.5” in length. This set comes in a hard plastic case perfect for sorting and storing heat shrink. Features:
  • Resistant to common fluids and solvents
  • UL and CSA listed
  • UV resistant
  • Meets DEF. STAN 59.97
  • Meets UL 224, 125°C and CSA C22.2 No. 198.1
  • Meets MIL-DTL-23053/5 Class 2 & 3
  • Flame retardant (Does not include transparent)
  • Seals and protects cable splices and terminations.
  • Thin wall tubing
Please Log In to view prices
Machine Pin Socket - Preci-Dip, Break Away, 1 Row, 15 Position
High quality single row machine pin sockets made by Preci-Dip. These sockets are the break-away type and can easily snap into smaller sizes such as 5 separate transistor sockets.
Please Log In to view prices
Transistor Set - tested and selected for Fuzz Face, 2N1309, PNP, Germanium
This is a set of two 2N1309 germanium transistors that have been hand-selected to work in the germanium Fuzz Face circuit. Also included are 4 metal film resistors to use in the circuit. In most cases, the values have been modified from the stock values slightly to ensure that the collector of Q2 biases to roughly -4.5V. A data sheet containing the schematic and the resistor values is included so that you can use your own resistor type if you would prefer. There is a range of bias voltages that can sound nice in a Fuzz Face, and voltages in original units varied. These transistors have been tested with bias voltage, sound, and noise level in mind. Note that due to a variety of factors such as battery/PSU voltage, temperature, and component tolerance, the voltage on the collector of Q2 may not measure at exactly -4.5V, but it should be close in a properly-built circuit.
Please Log In to view prices
¼" Jack - Switchcraft, Enclosed, Mono
The Switchcraft Type 111X enclosed ¼” jack is a high quality mono jack. This jack has two solder lugs. One for the tip and one for the sleeve. These jacks have been widely used across the industry and can also be found in many popular 5U synthesizers. Includes nut and washer.
  • Type 111X
  • 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

See W-SC-112BX for stereo
Please Log In to view prices
Reverb Module - Accutronics Belton, Digi-Log, horizontal mount
A great digital reverb sound that easily replaces a spring reverberation unit. Simple interface requires only input, output, +5V, and ground. Output requires no external capacitors.
Please Log In to view prices
Transistor - 2N2484, Silicon, TO-18 case, NPN
The 2N2484 is a silicon planar epitaxial NPN transistor in a TO-18 metal case type. The 2N2484 is primarily intended for use in high performance, low level, low noise amplifier applications.
Please Log In to view prices
Op-Amp - TL062, Dual, Low-Power, JFET Input, 8-Pin DIP
Dual low power opamps in an 8-pin DIP package. The TL062 offers a high input impedance and 1MHz bandwidth.
Please Log In to view prices
Knob - Davies, 1470, Daka-ware, Large, Pointer
Colors Available:
High-quality USA made knobs from Davies Molding. The large 1470 pointer knob is made of solid phenolic and features a fine ridged grip with a distinctive point. This classic knob has been used on a variety of guitar pedals such as the Klon and countless EHX effects.
  • Height: 0.50 in.
  • Length: 1.13 in.
  • Fits ¼" shaft with set screw
Please Log In to view prices
Knob - Plastic, Set Screw, Vertical Line, 0.525" Diameter
Colors Available:
Small plastic control knob with set screw and brass insert. This knob features a radial-brushed metal top and a stylish vertical knurl. The style is similar to the Boss middle knobs used on many pedals. Fits ¼” (6.35mm) pot shafts.
Please Log In to view prices
Transistor - NOS 2N404A, TI, Germanium, Gold Lead TO-5 Case, PNP
New old stock 2N404A PNP germanium transistors manufactured by Texas Instruments. These TI 2N404A feature gold plated leads. The 2N404A is used in many fuzz pedals along with other effects. The 2N404A is the same as the 2N404 but with a higher voltage rating. This transistor is in a TO-5 package with long leads commonly found on germanium transistors.
Please Log In to view prices
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.
Please Log In to view prices
Op-Amp - LM1458, Dual, 8-Pin DIP package
LM1458 dual op amp in an 8-pin DIP package. The LM1458 is a general purpose dual operational amplifier. The two amplifiers share a common bias network and power supply leads. Otherwise, their operation is completely independent. Features
  • No Frequency Compensation Required
  • Short-Circuit Protection
  • Wide Common-Mode and Differential Voltage Ranges
  • Low-Power Consumption
  • 8-Lead TO-99 and 8-Lead PDIP
  • No Latch Up When Input Common Mode Range is Exceeded
Please Log In to view prices
Integrated Circuit - DAB2130, VCO, Sound Semiconductor
The Sound Semiconductor DAB2130 is a pre-soldered DIP converter for the SSI2130. This board features the SSI2130 and two decoupling caps for the V+ and V- inputs. The pinout is labelled on the board and matches the QFN pinout. This adapter features a 32 pin DIP base with a .600 in. width. The pins are standard male headers so 2.54mm female headers are recommended for socketing the board. For the standard QFN version, please see P-Q-SSI2130. The first new VCO IC in decades, and worth the wait! 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. The SSI2130 is a new-generation voltage controlled oscillator subsystem for high-performance electronic musical instruments.
Please Log In to view prices
CMOS - CD4049, Hex Inverting Buffer and Converter, 16-Pin DIP
The CD4049UB devices are inverting hex buffers, and feature logic-level conversion using only one supply voltage (VCC). The input-signal high level (VIH) can exceed the VCC supply voltage when these devices are used for logic level conversions. These devices are intended for use as CMOS to DTL or TTL converters and can drive directly two DTL or TTL loads. (VCC = 5 V, VOL ≤ 0.4 V, and IOL ≥ 3.3 mA.) Features:
  • Inverting
  • High Sink Current for Driving 2 TTL Loads
  • High-to-Low Level Logic Conversion
  • 100% Tested for Quiescent Current at 20 V
  • Maximum Input Current of 1 µA at 18 V Over Full
  • Package Temperature Range; 100 nA at 18 V and 25°C
  • 5-V, 10-V, and 15-V Parametric Ratings

Applications
  • CMOS to DTL or TTL Hex Converters
  • CMOS Current Sink or Source Drivers
  • CMOS High-to-Low Logic Level Converters
Please Log In to view prices
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.
Please Log In to view prices
Felt Strip - 51.5", for Korg & Yamaha Keyboards
For Yamaha DX7, DX7 II, FX20, Korg M1, Trinity and T Series.
Please Log In to view prices
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.
Please Log In to view prices
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.
Please Log In to view prices