Synth & Eurorack Parts / DIY

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.

Plastic control knob with set screw and brass insert. This skirted knob is similar in style to the knobs found on many Boss pedals. It features a fluted grip with a radial-brushed metal top. The indicator line extends from the top of the down down through the bottom of the skirt. Fits ¼” (6.35mm) pot shafts.
See P-K370X for a skirted version.

BC109 NPN silicon transistors. The BC109 is a popular NPN choice for fuzz pedals and other effects such as vintage silicon Fuzz Face builds and Big Muff clones. Type hFE (IC=2mA, VCE=5V) hfe (IC=2mA, VCE=5V, f=1KHz) BC109B 200-450 240-500 BC109C 420-800 450-900

LF356 single op amp in an 8-pin DIP package. The LFx5x devices are the first monolithic JFET input operational amplifiers to incorporate well-matched, high-voltage JFETs on the same chip with standard bipolar transistors (BI-FET™ Technology). These amplifiers feature low input bias and offset currents/low offset voltage and offset voltage drift, coupled with offset adjust, which does not degrade drift or common-mode rejection.

The CD4070B contains four independent Exclusive-OR gates. The CD4070B provides the system designer with a means for direct implementation of the Exclusive-OR functions, respectively. Features:

• High-Voltage Types (20V Rating)
• CD4070B - Quad Exclusive-OR Gate
• Medium Speed Operation
• tPHL, tPLH = 65ns (Typ) at VDD = 10V, CL = 50pF
• 100% Tested for Quiescent Current at 20V
• Standardized Symmetrical Output Characteristics
• 5V, 10V and 15V Parametric Ratings
• Maximum Input Current of 1µA at 18V Over Full Package Temperature Range
• 100nA at 18V and 25°C
• Noise Margin (Over Full Package Temperature Range)
• 1V at VDD = 5V, 2V at VDD = 10V, 2.5V at VDD = 15V
• Meets All Requirements of JEDEC Standard No.

Linear taper, vertical mount, Song Huei pots with a 6mm shaft. These 9mm pots are popular in DIY guitar pedals, modular synthesizers, and other projects where space is limited. The knurled shaft features a painted indicator line so no knob is required. These tall versions have a 17mm shaft length and a total height of 25mm. For audio taper versions, see R-VSHL-AX. For center notched linear taper versions, see R-VSHL-BX-CN.

BC238B NPN transistor in a TO-92 package. The BC238 is used in a variety of vintage pedals such as the Schaller Fuzz, a version of the Brian May treble boost,and later Jen / Tonebender fuzz pedals. The BC238B is a variant of the BC108B and works well in other classic fuzz pedals such as Fuzz Face and Big Muff builds.

Small plastic control knob with set screw and brass insert. This knob features a radial-brushed metal top, a fine straight-knurl grip, and a vertical pointer. Fits ¼” (6.35mm) pot shafts.

The P-K801-BRASS is a custom built Davies 1900H clone. This knob features a brass insert in addition to a thick plastic build resulting in the most solid version of this knob available. The thick plastic eliminates the unfortunate hairline fractures that can commonly be found near the set screw of other versions. The P-K801-BRASS has an infilled painted indicator and fits ¼” (6.35mm) pot shafts.

Ideal for precision assembly work with close tolerances and applications needing a well tooled appearance.

Audio taper, vertical mount, Song Huei pots with a 6mm shaft. These 9mm pots are popular in DIY guitar pedals, modular synthesizers, and other projects where space is limited. The knurled shaft features a painted indicator line so no knob is required. These tall versions have a 17mm shaft length and a total height of 25mm. For linear taper versions, see R-VSHL-BX. For center notched, linear taper versions, see R-VSHL-BX-CN.

Dual low power opamps in an 8-pin DIP package. The TL062 offers a high input impedance and 1MHz bandwidth.

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.

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"

Linear taper, vertical mount, Song Huei pots with a 6mm shaft and a notched center position sometimes called a center detent. These 9mm pots are popular in DIY guitar pedals, modular synthesizers, and other projects where space is limited. The knurled shaft features a painted indicator line so no knob is required. These tall versions have a 17mm shaft length and a total height of 25mm. For audio taper versions, see R-VSHL-AX. For standard linear taper versions, see R-VSHL-BX.

2SC945 NPN transistors. This is a silicon NPN transistor in a TO-92 package. The 2SC945 was used in many classic Boss pedals such as the CE-2 chorus.

CD4021B series types are 8-stage parallel- or serial-input/serial output registers having common CLOCK and PARALLEL/SERIAL CONTROL inputs, a single SERIAL data input, and individual parallel "JAM" inputs to each register stage. Each register stage is D-type, master-slave flip-flop. In addition to an output from stage 8, "Q" outputs are also available from stages 6 and 7. In the CD4021B serial entry is synchronous with the clock by parallel entry is asynchronous. Entry is controlled by the PARALLEL/SERIAL CONTROL input. When the PARALLEL/SERIAL CONTROL input is low, data is serially shifted into the 8-stage register synchronously with the positive transition of the clock line. When the PARALLEL/SERIAL CONTROL input is high, data is jammed into the 8-stage register via the parallel input lines and synchronous with the positive transition of the clock line.

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.

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.

Reverse audio taper 16mm solid shaft potentiometers with solder lug terminals. These pots are great for any project. 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”)
• Bushing Length: 6.5mm (0.256")
• Shaft Diameter: 6.35mm ( 0.250")
• Taper: Reverse Audio (Anti-Log)

16mm solid shaft linear potentiometers. These pots are great for any project. 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”)
• Bushing Length: 6.5mm (0.256")
• Shaft Diameter: 6.35mm ( 0.250")
• Taper: Linear

½" panel mount with solder lugs. Round plastic with normally closed switch. For barrel plugs with a 5.5mm external diameter and 2.1mm internal diameter.

Linear taper 16mm potentiometers with a T18 knurled shaft. These pots have right angle 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: 10.7 mm + 5 mm (0.421” + 0.197”)
• Lead Distance from shaft center: 16 mm (0.630”)
• Lead Thickness: 0.5 mm (0.020”)

PCB for converting SMD SSOP-20 SSI2140 chips to through hole DIP-18 SSM2040 chips. This adapter makes the SSI2140 pin for pin compatible with the original IC. Solder the device to this PCB then attach pin headers (sold seperately) to connect to through hole footprints on PCBs, breadboards and IC sockets.