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-L35X LED - 5mm diameter, diffused lens, 5 mCd
Colors Available:
5mm (T-1 ¾) diffused LED’s. Great for use in pedal builds and other applications where a tinted and diffused indicator is needed. Multiple colors available.
  • 5mm size
  • Tinted and diffused
  • Multiple colors available
  • Package of 5
package of 5
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P-QCD4071 CMOS - CD4071, Quad 2-Input OR Gates, 14-Pin DIP
CD4071B OR gates provide the system designer with direct implementation of the positive-logic OR function and supplement the existing family of CMOS gates. Features:
  • Medium-Speed Operation - tPLH, tPHL = 60 ns (typ.) at VDD = 10 V
  • 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
  • Standardized, symmetrical output characteristics
  • Noise margin (full package-temperature range):
    • 1 V at VDD = 5 V
    • 2 V at VDD = 10 V
    • 2.5 V at VDD = 15 V
  • 5-V, 10-V, and 15-V parametric ratings
  • Meets all requirements of JEDEC Tentative Standard No. 13B, "Standard Specifications for Description of ’B’ Series CMOS Devices"
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P-Q-AS395H Transistor - AS395H, Matched Pair, Alfa, TO5-8 case, PNP
The AS395 dual monolithic PNP transistor offers excellent parametric matching and high frequency performance. Low noise characteristics (1 nV/√Hz typ @ 1 kHz), high bandwidth (190 MHz typical), and low offset voltage (100 µV max), makes the AS395 an excellent choice for demanding preamplifier applications.Tight current gain matching (3% max mismatch) and high current gain (100 min), over a wide range of collector current, makes the AS395 an excellent choice for current mirrors. A low value of bulk resistance makes the AS395 an ideal component for applications requiring accurate logarithmic conformance. To ensure the long-term stability of the matching parameters, internal protection diodes across the base-emitter junction clamp any reverse base-emitter junction potential.
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P-QBA4560 Op-Amp - BA4560, Dual, General Purpose, 8-Pin DIP
The BA4560, is a dual operational amplifiers which achieves approximately twice the high output current of the BA4558, as well as featuring a higher slew rate of 4V / µs, a gain band width of 10MHz, and an improved frequency characteristic. 8-pin DIP package.
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W-BNUTL-BK Dress Nut - Befaco, Bananuts, for M7 Pots
Larger threaded black Bananuts for mounting potentiometers or other hardware with M7 bushings. These nuts look great beneath smaller sized knobs.
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P-H534 Switch - Carling, Mini Toggle, 3PDT
Carling mini-toggle switch, 3PDT, ideal for stomp boxes, phase switching, coil-tapping, series/parallel pickup switching in guitars.
  • 0.354" bushing length
  • 1/4" mounting hole diameter
  • On-On Three pole/double throw (3PDT)
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R-VAV-AX-K Potentiometer - Alpha, Audio, 9mm, Vertical, Knurled Shaft
Audio taper, vertical mount, Alpha pots with a 6mm T18 knurled shaft. These 9mm pots are popular in DIY guitar pedals, synthesizers, and other projects. Mounting nut and washer included.
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W-QP-PJ3410 3.5mm Jack - Qingpu, Eurorack, TRS, Switched, Panel or PC Mount
3.5mm TRS jacks with a switched tip found in many DIY Eurorack projects. These Qingpu Electronics jacks can be panel mounted with wires or more commonly PCB mounted. The PJ3410 jacks can be used for both mono and stereo signals. Hardware sold separately. See accessory items below.
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P-QOC46 Transistor - OC46, Germanium, SO-2 glass case, PNP
OC46 PNP germanium transistors. The OC46 is a popular PNP for fuzz pedals and boost effects. It can be found in vintage electronics and modern fuzz pedals. This transistor is in a black glass SO-2 package with long leads commonly found on germanium transistors.
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P-HTOG-GORVA-S1 Switch - GØRVA, Submini Toggle, SPDT, 2 Position, PC Pins, Medium Bat
Premium two position SPDT submini toggle switches from Gorva Design. The Bascular Sub Mini switches have a medium 7.37mm actuator length. These switches feature silver plated copper alloy contacts. The bushing is smooth and the switch is secured with the mounting bracket on the PCB. RoHS compliant & lead-free. Details
  • 5.59mm non-threaded bushing
  • 2-Position On/On
  • 4.95mm panel hole diameter
  • Single pole/Double throw (SPDT)
  • PC Pins

Features
  • Power Rating: DC9V, 1A
  • Contact Resistance: <20mΩ
  • Insulation Resistance: 1000MΩ Minimum
  • Dielectric Strength: 1000V RMS @ Sea Level
  • Operating Temperature: -40°C ~ +85°C
  • Electrical Life: 30,000 Cycles
  • RoHS & Lead-free
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P-QTL061 Op-Amp - TL061, Single, Low Power, JFET-input, 8-Pin DIP
TL061 single op amp in an 8-pin DIP package. The JFET-input operational amplifiers of the TL06x series are designed as low-power versions of the TL08x series amplifiers. They feature high input impedance, wide bandwidth, high slew rate, and low input offset and input bias currents. The TL06x series features the same terminal assignments as the TL07x and TL08x series. Features
  • Very Low Power Consumption
  • Typical Supply Current: 200 µA (Per Amplifier)
  • Wide Common-Mode and Differential Voltage Ranges
  • Low Input Bias and Offset Currents
  • Common-Mode Input Voltage Range Includes VCC+
  • Output Short-Circuit Protection
  • High Input Impedance: JFET-Input Stage
  • Internal Frequency Compensation
  • Latch-Up-Free Operation
  • High Slew Rate: 3.5 V/µs Typical
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P-K900X Knob - Chicken Head, mini, high-quality, brass insert, Set Screw
Colors Available:
High quality miniature chicken head knob with set screw for smaller applications. 0.90" long nose to tail. Mini Davies 2300 clone.
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P-QCD4024 CMOS - CD4024, 7-Stage Ripple-Carry Binary Counter/Divider, 14-Pin DIP
CD4024B is a 7-stage ripple-carry binary counter. All counter stages are master-slave flip-flops. The state of a counter advances one count on the negative transition of each input pulse; a high level on the RESET line resets the counter to its all zeros state. Schmitt trigger action on the input-pulse line permits unlimited rise and fall times.
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P-JBLB-SI-U Power Jack - Lumberg, DC Panel Mount, Snap-in, 5.5mm External, 2.1mm Internal
Snap-in Lumberg panel mount barrel jack with solder lugs. This high quality jack is a similar size to the Lumberg low profile jack but easily snaps into place with no need to thread a nut inside the chassis. For use with barrel plugs with a 5.5mm external diameter and 2.1mm internal diameter.
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P-K344X Knob - Plastic, Set Screw, Small MXR Style, 0.75" diameter
Colors Available:
Small plastic knobs with set screw and brass insert. Similar to the small knobs used on many Dunlop / MXR pedals. These knobs have a fluted grip with an indicator line as well as a dot indicator on the skirt. Fits ¼” (6.35mm) pot shafts.
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P-K281S-X Knob - Rogan, PT Series, 1S, Small, Skirted, D-Shaft
Colors Available:
High-quality USA made knobs from Rogan Corp. These small, skirted 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: 0.71 in.
  • Diameter: 0.57 in.
  • Fits 6mm D Shafts
  • No indicator

A variety of different sizes are available from the PT Series.
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S-W604X ZipWire - Jumper Cable Kit for circuits
The ZipWire™ Kit provides a convenient way to connect the signals in your projects. The wires can be unzipped for individual wires as needed and the color-coding can be used to organize power, ground and other signal types to keep your circuit organized. The rainbow colored ribbon cable provides the 10 standard electrical colors.
package of 120
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R-VAM5KC-SS-PCL2 Potentiometer - Alpha, Reverse Audio, Solid Shaft, Long PC, 16mm, 5kΩ
5kΩ reverse audio taper Alpha 16mm pots with a solid shaft and long PCB 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: 20.7 mm + 4 mm (0.815” + 0.158”)
  • Lead Distance from shaft center: 14.3 mm (0.563”)
  • Lead Thickness: 0.5 mm (0.020”)
  • Shaft Diameter: 6.35 mm (0.25”)
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P-H54-DRESS-X Nut - Dress Nut, For Mini Toggle Switches
Colors Available:
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.
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R-VADAPT-4MM Potentiometer Adapter Sleeve - Converts 4mm shaft to 6mm
This nickel-plated steel adapter sleeve converts a 4mm shaft potentiometer to 6mm shaft, allowing for 6mm knobs to be used on a wider range of potentiometers. An additional 6mm to 6.35mm adapter R-VADAPT-25 can then be used to fit 1/4” knobs (sold seperately).
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P-STR-004 Transistor Socket - Mill Max, 3 Pin, Machine Pin, Through Hole
High quality TO package transistor sockets by Mill-Max. These machine pin sockets make swapping transistors in pedals and other projects a simple process. These use a standard TO footprint so they are ready for use on PCBs with matching footprints.
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P-L190-X Indicator Light - Bakelite, Soviet, Incandescent, 9V
Colors Available:
New-old-stock Soviet pilot lights that operate on 9V. These lights have a unique bakelite frame and metal bezel. The lights come with a 9V bulb but can be used with any voltage bulb that fits this type of socket. The diameter of the light is 12mm and the diameter of the mounting hole is 8.1mm. Includes a wavy washer and knurled nut. Note: There can be small differences in the appearance and tint of the lens and color of the bakelite. A small 0.1” notch must either be filed into the 0.625” mounting hole or filed off of the fuse to flush mount with a panel. The small bulbs can come loose during shipping and reseating the bulb is recommended before use.
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P-Q-AS571D Integrated Circuit - AS571D, Compandor, Alfa, SOIC-16
The AS571D is Alfa’s version of the NE571 or SA571 in an SOIC package. AS571 is a versatile low cost dual gain control circuit in which either channel may be used as a dynamic range compressor or expandor. Each channel has a full-wave rectifier to detect the average value of the signal, a linearized temperature-compensated variable gain cell, and an operational amplifier. AS571 is well suited for use in VCA blocks, noise reduction systems, compandors/expanders ,etc. Features
  • Complete compressor and expandor
  • Temperature compensated
  • Channel separation >86 dB
  • Greater than 110 dB dynamic range
  • Levels adjustable with external components
  • Distortion may be trimmed out

Applications
  • VCA
  • High level limiter
  • Low level expandor − noise gate
  • Dynamic filters
  • Dynamic noise reduction systems
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C-D-2000V Capacitor - 2000V, Ceramic Disc, ± 10%
Ceramic disc capacitors rated for up to 2kV, ± 10% tolerance.
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