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.
Transistor - MPSA14, Darlington, 500mA, 30V, NPN
MPSA14 NPN Darlington transistor (TO-92 package) - designed for high gain, low noise general purpose amplifier applications.
  • Max collector to emitter voltage = 30 V
  • Max collector to base voltage = 30 V
  • Max emitter to base voltage = 10 V
  • Max collector current = 0.5 A (continuous)
$0.25
Knob - Scalloped Edge, Indicator Line, Set Screw
Colors Available:
Set screw knob with indicator line and scalloped edge. Measures .50" in diameter and .6" in height. Davies 1900H clone
$0.79
Op-Amp - LM741, Single, general purpose, 8-Pin DIP
LM741 single opamp in an 8-pin DIP package. The LM741 has been used in classic guitar pedals such as the Distortion Plus.
The LM741 series are general purpose operational amplifiers which feature improved performance over industry standards like the LM709. They are direct, plug-in replacements for the 709C, LM201, MC1439 and 748 in most applications. The amplifiers offer many features which make their application nearly foolproof: overload protection on the input and output, no latch-up when the common mode range is exceeded, as well as freedom from oscillations.
$0.90
Transistor - BC560, General Purpose, TO-92 case, PNP
The BC560 is a silicon general purpose PNP transistor in a TO-92 package. The BC560’s typical applications include signal processing, amplification, and switching.
$0.35
Transistor - GT309E, Germanium, USSR Saucer Case, PNP
New old stock Soviet GT309E transistors manufactured in Ukraine. The GT309E is a germanium PNP transistor in a very low profile case. The case has a 0.29” diameter and is only 0.1” thick. These have very low leakage and work well in a variety of fuzz pedal builds.
$4.95
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.
Starting at $0.95
Potentiometer - Alpha, Audio, 9mm, Vertical, D-Shaft
Audio taper (log), vertical mount, Alpha pots with a 6mm D shaft. These 9mm pots are popular in DIY guitar pedals, synthesizers, and other projects. Mounting nut and washer included.
$1.90
Wire - 22 AWG Solid Core, PVC, 600V, Variety Pack
Variety pack, 10 feet for each color. Great for color-coded wiring with smaller quantities. 600V rating. Tinned copper. See photos for detail. UL style 1015, rated to 105 degrees C. Perfect for new projects or rewiring any electrical equipment. 6 Pack (6 colors, 60 total feet) includes:
  • Black
  • Red
  • Green
  • White
  • Yellow
  • Blue

​​9 Pack (9 colors, 90 total feet) includes:
  • Black
  • Red
  • Green
  • White
  • Yellow
  • Blue
  • Orange
  • Brown
  • Purple

See S-W33 for 50 foot rolls of individual colors.
Starting at $11.95
Nut - Wide Dress Nut, Threaded Through, For Mini Toggle Switches
Threaded through wide dress nuts for use with mini toggle switches. This wide based 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 wide chamfered edge for a professional and unique look. These work on any 1/4-40 UNS threaded bushing. Two sides are flatted for use with a tool when fastening.
$1.15
Transistor - 2N1711, Silicon, TO-39 case, NPN
The 2N1711 is a silicon planar epitaxial NPN transistor in a TO-39 metal case. It is intended for use in high performance amplifiers, oscillators and switching circuits. The 2N1711 is a great choice for amplifiers where low noise is an important factor.
$1.00
Potentiometer Adapter Sleeve - Converts .125” shaft to ¼"
This nickel-plated brass adapter sleeve converts a 0.125 in. (3.17mm) shaft potentiometer to ¼" shaft (6.35mm), allowing for ¼" knobs to be used on a wider range of potentiometers. The cutout on the sleeve allows the set screw of the knob to secure directly to the shaft of the pot. Depending on the knob used, a longer set screw can be required.
$2.65
Potentiometer - Alpha, Linear, 9mm, Vertical, Center Notch
Linear taper, vertical mount, Alpha pots with a 6.35mm shaft diameter and a center notch (detent). The center notch is useful for builds where the center position of the pot is commonly used such as panners or EQ controls. These 9mm pots are popular in DIY guitar pedals, synthesizers, and other projects. Mounting nut and washer included.
$1.95
Op-Amp - NJM4580D, Dual, Audio, DIP 8
The NJM4580D (JRC4580) is a dual opamp popularly used in many distortion pedals. This chip is a dual operational amplifier, specially designed for improving the tone control, which is most suitable for the audio application. Featuring noiseless, higher gain bandwidth, high output current and low distortion ratio, it is most suitable not only for acoustic electronic parts of audio pre-amp and active filter, but also for the industrial measurement tools. It is also suitable for the headphone amp at higher output current, and furthermore, it can be applied for the handy type set operational amplifier of general purpose in application of low voltage single supply type which is properly biased of the low voltage source. Features:
  • Operating Voltage ±2V~±18V
  • Low Input Noise Voltage 0.8µVrms typ.
$1.09
Regulator - MC78L05, 5 Volt, Linear Voltage Regulator
MC78L05 5V Linear Regulator. Used in MOD® kits. The TI version is the LM78L05. This fixed-voltage monolithic integrated circuit voltage regulator is suitable for applications that required supply current up to 100 mA.
$0.55
Diode - 1N4739A, 9.1V, Zener, 1W, 5% Tolerance
1N4739A 9.1V zener diode in a DO-41 package. 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.
$0.27
Op-Amp - TL071, Single, Low-Noise, JFET-input, 8-Pin DIP
TL071 single op amp in an 8-pin DIP package. The TL07xx JFET-input operational amplifier family is designed to offer a wider selection than any previously developed operational amplifier family. Each of these JFET-input operational amplifiers incorporates well-matched, high-voltage JFET and bipolar transistors in a monolithic integrated circuit. The devices feature high slew rates, low-input bias and offset currents, and low offset-voltage temperature coefficient. The low harmonic distortion and low noise make the TL07xseries ideally suited for high-fidelity and audio pre-amplifier applications.
$0.82
Potentiometer - Alpha, Linear, 9mm, Vertical, Knurled Shaft
Linear 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.
$1.90
OTA - LM13700, Dual, Linearizing Diodes and Buffers, 16-Pin DIP
The LM13700 series consists of two current controlled transconductance amplifiers, each with differential inputs and a push-pull output. The two amplifiers share common supplies but otherwise operate independently. 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. High impedance buffers are provided which are especially designed to complement the dynamic range of the amplifiers. The output buffers of the LM13700 differ from those of the LM13600 in that their input bias currents (and thus their output DC levels) are independent of IABC.
$3.29
Switch - Carling, Mini Toggle, DPDT, 3 Position, Solder Lugs, Flatted
Genuine Carling DPDT 3-position mini toggle switch with solder lugs. These switches feature a flattened actuator.
  • 0.354" bushing length
  • 3-Position
  • ¼" chassis hole diameter
  • DPDT ( Double Pole/ Double Throw) switch
  • Solder Lugs
Starting at $6.45
Op-Amp - TL074, Quad, Low-Noise, JFET Input, 14-Pin DIP
Low noise JFET quad operational amplifier. Incorporates well matched, high-voltage JFET and bipolar transistors in a monolithic integrated circuit. Features high slew rates, low input bias and offset currents, and low offset voltage temperature coefficients. Features:
  • Wide common-mode and differential voltage range
  • Low input bias and offset current
  • Low noise en = 15 nV/HZ
  • Output short-circuit protection
  • High input impedance JFET input stage
  • Low harmonic distortion: 0.01%
  • Internal frequency compensation
  • Latch up free operation
  • High slew rate: 16 V/us (typical)
$1.32
Wire - 22 AWG Stranded Core, PVC, 600V, 50 Foot Roll
Colors Available:
600V stranded. Strands are tinned individually. See photos for detail. UL style 1015, rated to 105 degrees C. Perfect for new projects or rewiring any electrical equipment.
Starting at $7.95
Nut - M3-0.5 Hex Nut, Stainless Steel
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.
$0.80
package of 5
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.
$5.95
Knob - Phenolic, Set Screw, Gaunt Chicken Head
High quality chicken head knobs with vintage gaunt design. The gaunt chicken head has a thinner band that extends above the base allowing for easy manipulation of the knob. This knob has a thick infilled indicator line and is made of solid phenolic. Fits 0.25” (6.35mm) shafts with set screw and brass insert.
  • Height: 0.67 in.
  • Length: 1.26 in.
  • Fits ¼" shaft with set screw
$1.20