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.
Switch Accessory - Mini Toggle Caps
Colors Available:
Rubber caps / switch tips for mini toggle switches in a variety of colors. These are made for standard sized toggle bats.
Starting at $0.39
Wire - Bus, 100 foot Spool, tinned copper
Solid tinned copper bus wire. 105°C temperature rating, 600V.
Starting at $6.95
Potentiometer - Alpha, Audio, 9mm, Vertical
Audio taper (log), vertical mount, Alpha pots with a 6.35mm shaft diameter. These 9mm pots are popular in DIY guitar pedals, synthesizers, and other projects. Mounting nut and washer included.
$1.85
Transistor - 2N3906, TO-92 case, PNP, Lead Free
General purpose low-power PNP bipolar junction transistor, used frequently in hobbyist electronic projects. This version is lead free.
For a lead free 2N3904 see P-Q2N3904-LF.
$0.45
Op-Amp - M5201, Dual, With Switch, 8-Pin DIP
The NJM2120 is a dual operational amplifier of 2-INPUT and 1-OUTPUT with analog switch. The NJM2120 can be used as analog switch under the condition of GV=0dB, as Switch + Amp in order that each gain (A or B) can be adjusted independently. Each amplifier of the NJM2120 has the same electrical characteristics as the NJM4558. The NJM2120 is suitable for audio, video, electrical musical instrument, etc.
$4.50
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
  • Three pole/double throw (3PDT)
$3.50
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
Resistors - ⅛ Watt, Metal Film, 1% tolerance
Package of 5
Metal Film resistors consist of a resistive element of an extremely thin layer of metal alloy vacuum deposited on a substrate. Precise and quiet. These 1/8W resistors have a very small body and are great for tight builds.
$0.65
ZipWire - Jumper Cable Kit for circuits
Package of 120
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.
Starting at $9.50
Switch - Korg, Momentary Tactile Switch, Medium Length Actuator
Genuine Korg momentary switch used in many Korg products.such as the O5R/W, A1, i30, i30HD, OASYS, Trinity, Triton, Triton EX, Triton Studio, and X5DR.
$5.95
Starting at $0.20
Diode - 1N5817, Schottky, High Switching Speed
Schottky diode with low forward voltage drop and high switching speeds.
$0.15
Washer - Flat, M3, Nylon, for Front Panels
Package of 10
Colors Available:
High quality nylon M3 flat washers. These durable washers fit perfectly on M3 threaded screws. The small outside diameter provides a clean look beneath the head of the screw. These are great mounting washers for preventing rack rash on front panels like Eurorack synths or any other use where the surface beneath the screw requires protection.
$0.95
Knob - Black, White Line, Silver Top, Set Screw, Boss Style
Black knob with white line, silver top, set screw and brass insert. Fits ¼" shaft with set screw. These Boss style knobs come in a variety of sizes. See P-K383X for an unskirted version.
Starting at $1.35