# 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.
Patch Cables - 3.5mm, Mono
Colors Available:
Low cost, high quality 3.5mm patch cables in a variety of lengths and colors. The cables are super flexible, have a great droop, and are shipped coiled so no permanent kinks are formed. With the large selection of lengths and colors, these cables are the perfect choice for any sized system.
Starting at $1.39 Partially Out of Stock Nut - Round, for mounting Qingpu PJ3410 3.5mm jacks Knurled, slotted nut for W-QP-PJ3410 3.5mm jacks. See W-QP-NUT-PJ-H for the hex version of this nut. See S-TND-2X for nut driver tool$0.10
Nut - Hex, for mounting Qingpu 3.5mm jacks
Hex nut for W-QP-419GR and W-QP-518MA 3.5mm jacks. See W-QP-NUT-K for the knurled, slotted version of this nut. See W-QP-WASHER for compatible washer
$0.10 Nut - Hex, for mounting Qingpu PJ3410 3.5mm jacks Hex nut for W-QP-PJ3410 3.5mm jacks. See W-QP-NUT-PJ-R for the round, slotted version of this nut.$0.10
Nut - Knurled, for mounting Qingpu 3.5mm jacks
Knurled, slotted nut for W-QP-419GR and W-QP-518MA 3.5mm jacks. See W-QP-NUT-H for the hex version of this nut. See W-QP-WASHER for compatible washer See S-TND-2X for nut driver tool
$0.10 Washer - Flat, for use on Qingpu Jacks Flat washer for W-QP-419GR and W-QP-518MA 3.5mm jacks.$0.12
Diode - 1N5817, Schottky, High Switching Speed
Schottky diode with low forward voltage drop and high switching speeds.
$0.15 Diode - 1N5818, Schottky, High Switching Speed, 30V, 10A 1N5818 schottky diode with low forward voltage drop and high switching speeds. • Very small conduction losses • Negligible switching losses • Extremely fast switching • Low forward voltage drop • Avalanche capability specified$0.15
Switch Accessory - Mini Toggle Caps, Short Bat, 11 Colors
Colors Available:
Rubber caps / switch tips for mini toggle switches in a variety of colors. These are made for short sized toggle bats. Available in 11 different colors. See P-HTCAP-X for standard-length caps.
$0.15 Diode - Small Signal Fast Switching, 1N4448 A semiconductor device which passes current in the forward direction(from anode to cathode), and blocks current in the opposite direction. Features • Silicon epitaxial planar diodes • Low power loss, high efficiency • Low leakage • Low forward voltage • High speed switching • High current capability • High reliability Used in a variety of Fender amps. Replacement for Fender part number 0006260049$0.15
Transistor - MPSA18, Darlington 200mA 45V NPN
NPN Darlington 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)
$0.15 Switch Accessory - Mini Toggle Caps, Standard Bat, 11 Colors Colors Available: Rubber caps / switch tips for mini toggle switches in a variety of colors. These are made for standard sized toggle bats. Available in 11 different colors.$0.15
Diode - 1N914, Small Signal
The 1N914 is a small signal diode similar to the 1N4148 and is common in many older electronics. The 1N914 is general purpose and can be used in a multitude of different applications.
$0.18 Transistor - 2N3904, TO-92 case, NPN General purpose low-power NPN bipolar junction transistor, used frequently in hobbyist electronic projects.$0.18
Diode - General purpose rectifier, 1A, 1N400X
A semiconductor device which passes current in the forward direction (from anode to cathode), and blocks current in the opposite direction.
Starting at $0.19 Transistor - 2N5088, Bipolar, General Purpose 2N5088 NPN Bipolar Junction Transistor in TO-92 package$0.20
Diode - 1N4741A, 11V, Zener, 1W, 5% Tolerance
1N4741A 11V 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.
$0.20 Diode - 1N4748A, 22V, Zener, 1W, 5% Tolerance 1N4748A 22V 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.$0.20
Capacitor - 100V, Ceramic Disc, ± 10%
100 V ceramic disc capacitors. ± 10% tolerance.
Starting at $0.20 Capacitor - Kemet, R82 Series, Polyester, 5mm Spacing High quality R82 Series box film capacitors from Kemet. These polyester film capacitors have 5mm lead spacing, a minimum voltage rating of 63VDC, and a tolerance of ±10% or better. The small size, high specifications, and radial mounting makes them an excellent choice for PCB builds of pedals, synthesizer, and other audio equipment. The R82 Series is constructed of metallized polyester film with radial leads of tinned wire. Radial leads are electrically welded to the contact metal layer on the ends of the capacitor winding. The capacitor is encapsulated with thermosetting resin in a box of material meeting the UL 94V–0 requirements. • Voltage rating: 63 VDC Minimum • Lead Spacing: 5 mm • Capacitance tolerance: ±10% or better • Operating temperature range of -55˚C to +105˚C • RoHS compliance and lead-free terminations • Self-healing Starting at$0.20
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.
$0.22 Transistor - BC548, General Purpose, TO-92 case, NPN The BC548 is a silicon general purpose NPN transistor in a TO-92 package. The BC548’s typical applications include signal processing, amplification, and switching. The BC548 is available in two different gain ranges: BC548B and BC548C. Type hFE (IC=2mA, VCE=5V) BC548B 200-450 BC548C 420-800$0.25
Transistor - 2N5172, Silicon, TO-92 case, NPN
The 2N5172 is a silicon general purpose NPN transistor in a TO-92 package. The 2N5172’s typical applications include general purpose amplification and switching.
$0.25 Transistor - BC557C, General Purpose, TO-92 case, PNP The BC557 is a silicon general purpose PNP transistor in a TO-92 package. The BC557’s typical applications include signal processing, amplification, and switching.$0.25
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