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-K379X 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.
$0.85
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.
$0.79
P-QLM741 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.
$0.79
P-H54-DRESS-THRU 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.
$0.79
S-HS-SKT-X Screws - M3-0.5 Socket Head Cap, 8mm Length
Package of 5
Colors Available:
Ideal for precision assembly work with close tolerances and applications needing a well tooled appearance.
Starting at $0.75
S-HS-M3-X Screw - M3, Phillips, Pan Head, Machine
Package of 5
Phillips panhead machine screw, M3 metric, 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.
See S-HS-M3-6-X for colored 6mm M3 screws.
Starting at $0.75
S-HS-BTN-X Screws - M3-0.5 Button-Head Socket Cap, 8mm Long
Package of 5
Colors Available:
Button-Head Socket Cap Screws - Class 10.9, ISO 7380 Coarse Thread. Used when a wider bearing surface or smoother, more finished appearance is desired.
Starting at $0.75
P-K805 Knob - Plastic, Set Screw, Knurled w/ Dot, 0.605" Diameter
Small black plastic control knob with set screw and brass insert. These unique knobs are similar in style to the Davies 1140. They have a thick decorative knurl. A white dot as well as a vertical cutout channel serve as the indicator. Fits ¼” (6.35mm) pot shafts.
$0.75
P-STR-003 Transistor Socket - Cinch, 3 Pin, Phenolic, NOS
New-old-stock transistor sockets made by Cinch. These three pin phenolic sockets offer a more secure hold than the standard machine-pin transistor sockets of today. They can fit a variety of different transistor package sizes. The flat solder lugs can work in point to point builds or in PCBs with appropriate footprints.
$0.75
P-K800X Knob - Mini Indicator, Set Screw, 15mm x 11mm
Colors Available:
Mini fluted knob with infilled indicator line. Pairs well with the larger P-K850X. Fits ¼” (6.35mm) pot shafts.
  • Height: 11mm
  • Diameter: 15mm
  • Fits 1/4" shaft with set screw
Starting at $0.75
P-Q4558 Op-Amp - 4558, Dual high-gain, 8-Pin DIP
Dual Operational Amplifier. The 4558 integrated circuit is a dual high-gain operational amplifier internally compensated and constructed on a single silicon chip using an advanced epitaxial process. Combining the features of the NJM741 with the close parameter matching and tracking of a dual device on a monolithic chip results in unique performance characteristics. Excellent channel separation allows the use of the dual device in single NJM741 operational amplifier applications providing density. It is especially well suited for applications in differential-in, differential-out as well as in potentiometric amplifiers and where gain and phase matched channels are mandatory. Features:
  • Operating Voltage (±4V~±18V)
  • High Voltage Gain (100dB typ.)
  • High Input Resistance (5MΩ typ.)
  • Bipolar Technology
$0.75
P-K380X Knob - Small, Indicator Line, set screw
Colors Available:
The P-K380 is a high quality Davies 1510 clone. This classic design can be found on countless pedals, synths, amps and other equipment. The set screw uses a metal insert for additional stability and durability. This knob has an infilled painted indicator and fits 1/4" (6.35mm) pot shafts. The P-K380 pairs nicely with the color matched P-K801-BRASS-X knobs.
Starting at $0.70
R-VNUT-38 Nut & Washer - Panel, for ⅜" Potentiometers
Replacement nut and washer for pots with a ⅜" bushing diameter.
$0.70
P-QTL072 Op-Amp - TL072, Dual, Low-Noise, JFET Input, 8-Pin DIP
The TL072 is a high speed JFET input dual operational amplifier incorporating well matched, high voltage JFET and bipolar transistors in a monolithic integrated circuit. The device features high slew rates, low input bias and offset current, and low offset voltage temperature coefficient.
$0.70
P-L35X LED - 5mm diameter, diffused lens, 5 mCd
Package of 5
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
$0.70
P-L300X LED - 3mm diameter, diffused lens, 3.6 mCd
Package of 5
Colors Available:
New!:
Lens Diameter: 3 mm Overall Height: 5.4 mm Lens Type: Diffused Multiple color options available.
$0.70
P-QMC7805 Regulator - 7805, 5 Volt, 1A, Linear Voltage Regulator
5V linear regulator with up to 1 amp of current in a TO-220 package. This style of regulator can be found in many power supplies and also modular synth circuits as well as some stomp boxes. These voltage regulators are monolithic integrated circuits designed as fixed−voltage regulators for a wide variety of applications including local, on−card regulation. These regulators employ internal current limiting, thermal shutdown, and safe−area compensation. With adequate heatsinking they can deliver output currents in excess of 1.0 A. Although designed primarily as a fixed voltage regulator, these devices can be used with external components to obtain adjustable voltages and currents.
$0.65
P-HDR-SHR-10 Box Header - Shrouded, 10 Pin, Right Angle
High quality right angled 10-pin headers. Right angled headers are perfect for compact eurorack builds. The durable glass filled polyester shroud makes soldering these shrouded headers a simple task.
$0.65
S-HSO-M3-X Standoff - M3, Male-Female, Aluminum, 5.5mm Diameter
  • Finish/Plating: Clear Iridite
  • Material: Aluminum
  • OD: 5.5mm
  • Shape: Hex (Metric)
  • Style: M-F Standoff
  • Thread Depth(D): 8mm
  • Thread Length (TL): 8mm
  • Thread: M3
  • Type: Threaded Standoffs
Starting at $0.60
P-L710-X LED Lens - Fresnel, Polycarbonate, 5mm
Colors Available:
Panel mount led lenses made of high quality polycarbonate. These lenses provide a clean semi-flush appearance with a small panel footprint and work well in any project using LED indicators. Features:
  • ¼” mounting hole
  • For panel thicknesses of 1/16” to ⅛”
  • Fresnel lens
  • Low Profile
Starting at $0.59
P-QLM317T Regulator - LM317T, Adjustable Output, 1.5A, Linear Voltage Regulator
Linear regulator with an adjustable voltage range from 1.2V to 37V. This regulator can supply 1.5A of current making it a great option for power supplies.
$0.56
C-D680-50 Capacitor - 50V, 680pF, Ceramic Disc
Ceramic disc capacitor, 680 pF (.00068µF) rated for up to 50 V.
Non linear temperature coefficient of capacitance
$0.55
P-Q1N53X Diode - Zener, 5 Watt, ±5% tolerance
5W zener diodes that are great for use in tube amps. These are commonly used to drop B+ voltages for tube modification compatibility or to create low power modes for the amp. A zener is 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.
$0.55
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.
$0.55
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