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.
Knob - Rogan, PT Series, 2S, Medium, Skirted, D-Shaft
High-quality USA made knobs from Rogan Corp. These medium, skirted knobs from Rogan’s PT Series feature a soft rubber grip molded over a solid polymer knob. PT Series knobs can be found on synthesizer modules from Make Noise, Mutable Instruments and others. Fits 6mm D-shafts.
  • Height: 0.84 in.
  • Diameter: 0.62 in.
  • Fits 6mm D Shafts
  • No indicator

A variety of different sizes are available from the PT Series.
$1.65
Knob - Rogan, PT Series, 3PS, Large, Skirted, Pointer, D-Shaft
High-quality USA made knobs from Rogan Corp. These large, skirted pointer knobs from Rogan’s PT Series feature a soft rubber grip molded over a solid polymer knob. PT Series knobs can be found on synthesizer modules from Make Noise, Mutable Instruments and others. Fits 6mm D-shafts.
  • Height: 0.71 in
  • Diameter: 0.73 in
  • Fits 6mm D Shafts
  • Indicator on round side of D-shaft

A variety of different sizes are available from the PT Series.
$1.75
Knob - Rogan, PT Series, 6PS, Extra Large, Skirted, Pointer, D-Shaft
High-quality USA made knobs from Rogan Corp. These extra large, puck-shaped, skirted pointer knobs from Rogan’s PT Series feature a soft rubber grip molded over a solid polymer knob. PT Series knobs can be found on synthesizer modules from Make Noise, Mutable Instruments and others. Fits 6mm D-shafts.
  • Height: 0.63 in.
  • Diameter:1.25 in.
  • Fits 6mm D Shafts
  • Indicator on round side of D-shaft

A variety of different sizes are available from the PT Series.
$1.95
Knob - Rogan, RB-67 Series, Small, Skirted
Colors Available:
High-quality USA made knobs from Rogan Corp. These small knobs feature a metal insert, spun aluminum inlay, and a skirt with an infilled arrow indicator. The RB-67 Series from Rogan is popularly used on Buchla 200 Series modular synthesizers and can be found on many contemporary eurorack synthesizers..
  • Height: 0.66 in.
  • Diameter: 0.90 in
  • Fits ¼" shaft with set screw

A variety of sizes and colors are available from the RB-67 Series. See the links below for the full selection of knobs from this series. P-K770-X Small P-K770S-X Small Skirted P-K771S-X Medium Skirted P-K772S-B Large Skirted
$3.95
Knob - Rogan, 155 Series, Witch Hat, Small Skirt, Indicator Line
High-quality USA made knobs from Rogan Corp. These phenolic knobs feature a brushed aluminum inlay, a small skirt and an infilled indicator line. 155 Series knobs can be found on classic gear from Sunn, Music Man, Gibson and others. Fits ¼" shaft potentiometers.
  • Height: 0.62 in.
  • Diameter: 0.84 in.
  • Fits ¼" shaft with set screw

A variety of different knobs are available from the 155 Series. See the links below for the full selection. P-K155-2 0-10 Witch Hat P-K155-3 Large Witch Hat w/ Arrow
$2.75
Knob - Rogan, RB-67 Series, Large, Skirted
High-quality USA made knobs from Rogan Corp. These large knobs feature a metal insert, spun aluminum inlay, and a skirt with an infilled arrow indicator. The RB-67 Series from Rogan is popularly used on Buchla 200 Series modular synthesizers and can be found on many contemporary eurorack synthesizers.
  • Height: 1.02 in.
  • Diameter: 1.52 in.
  • Fits ¼" shaft with set screw

A variety of sizes and colors are available from the RB-67 Series. See the links below for the full selection of knobs from this series. P-K770-X Small P-K770S-X Small Skirted P-K771S-X Medium Skirted P-K772S-B Large Skirted
$4.95
Knob - Rogan, PT Series, 1P, Small, Pointer, Knurled Shaft
High-quality USA made knobs from Rogan Corp. These small pointer knobs from Rogan’s PT Series feature a soft rubber grip molded over a solid polymer knob. PT Series knobs can be found on synthesizer modules from Make Noise, Mutable Instruments and others. Fits 6mm T18 knurled shafts.
  • Height: 0.55 in.
  • Diameter: 0.45 in.
  • Fits T18 Knurled Shafts

For a D-shaft version of this knob, see P-K281P-W. A variety of different sizes are available from the PT Series. See the links below for the full selection of knurled shaft knobs from this series. P-K271PS-W 1PS Small Skirted Pointer P-K272P-W 2P Medium Pointer P-K272PS-W 2PS Medium Skirted Pointer
$1.65
Knob - Rogan, PT Series, 2P, Medium, Pointer, Knurled Shaft
High-quality USA made knobs from Rogan Corp. These medium pointer knobs from Rogan’s PT Series feature a soft rubber grip molded over a solid polymer knob. PT Series knobs can be found on synthesizer modules from Make Noise, Mutable Instruments and others. Fits 6mm T18 knurled shafts.
  • Height: 0.68 in.
  • Diameter: 0.50 in.
  • Fits T18 Knurled Shafts

For a D-shaft version of this knob, see P-K282P-W. A variety of different sizes are available from the PT Series. See the links below for the full selection of knurled shaft knobs from this series. P-K271P-W 1P Small Pointer P-K271PS-W 1PS Small Skirted Pointer P-K272PS-W 2PS Medium Skirted Pointer
$1.65
Knob - Rogan, PT Series, 1S, Small, Skirted, D-Shaft
Colors Available:
High-quality USA made knobs from Rogan Corp. These small, skirted knobs from Rogan’s PT Series feature a soft rubber grip molded over a solid polymer knob. PT Series knobs can be found on synthesizer modules from Make Noise, Mutable Instruments and others. Fits 6mm D-shafts.
  • Height: 0.71 in.
  • Diameter: 0.57 in.
  • Fits 6mm D Shafts
  • No indicator

A variety of different sizes are available from the PT Series.
$1.65
Knob - Rogan, PT Series, 2P, Medium, Pointer, D-Shaft
High-quality USA made knobs from Rogan Corp. These medium pointer knobs from Rogan’s PT Series feature a soft rubber grip molded over a solid polymer knob. PT Series knobs can be found on synthesizer modules from Make Noise, Mutable Instruments and others. Fits 6mm D-shafts.
  • Height: 0.68 in.
  • Diameter: 0.50 in.
  • Fits 6mm D Shafts
  • Indicator on round side of D-shaft

For a T18 knurled version of this knob, see P-K272P-W. A variety of different sizes are available from the PT Series.
$1.65
Knob - Rogan, PT Series, 2PS, Medium, Skirted, Pointer, D-Shaft
High-quality USA made knobs from Rogan Corp. These medium, skirted pointer knobs from Rogan’s PT Series feature a soft rubber grip molded over a solid polymer knob. PT Series knobs can be found on synthesizer modules from Make Noise, Mutable Instruments and others. Fits 6mm D-shafts.
  • Height: 0.84 in.
  • Diameter: 0.62 in.
  • Fits 6mm D Shafts
  • Indicator on round side of D-shaft

For a T18 knurled version of this knob, see P-K272PS-W. A variety of different sizes are available from the PT Series.
$1.65
Knob - Rogan, PT Series, 5PS, Wide, Skirted, Pointer, D-Shaft
High-quality USA made knobs from Rogan Corp. These large, puck-shaped, skirted pointer knobs from Rogan’s PT Series feature a soft rubber grip molded over a solid polymer knob. PT Series knobs can be found on synthesizer modules from Make Noise, Mutable Instruments and others. Fits 6mm D-shafts.
  • Height: 0.45 in.
  • Diameter: 0.84 in
  • Fits 6mm D Shafts
  • Indicator on round side of D-shaft

A variety of different sizes are available from the PT Series.
$1.85
Knob - Rogan, RB-67 Series, Small
Colors Available:
High-quality USA made knobs from Rogan Corp. These small knobs feature a metal insert and a spun aluminum inlay with a black indicator line. The RB-67 Series from Rogan is popularly used on Buchla 200 Series modular synthesizers and can be found on many contemporary eurorack synthesizers.
  • Height: 0.48 in.
  • Diameter: 0.51 in.
  • Fits ¼" shaft with set screws

A variety of sizes and colors are available from the RB-67 Series. See the links below for the full selection of knobs from this series. P-K770-X Small P-K770S-X Small Skirted P-K771S-X Medium Skirted P-K772S-B Large Skirted
$2.65
Knob - Rogan, RB-67 Series, Medium, Skirted
Colors Available:
High-quality USA made knobs from Rogan Corp. These medium knobs feature a metal insert, spun aluminum inlay, and a skirt with an infilled arrow indicator. The RB-67 Series from Rogan is popularly used on Buchla 200 Series modular synthesizers and can be found on many contemporary eurorack synthesizers..
  • Height: 0.77 in.
  • Diameter: 1.15 in.
  • Fits ¼" shaft with set screws

A variety of sizes and colors are available from the RB-67 Series. See the links below for the full selection of knobs from this series. P-K770-X Small P-K770S-X Small Skirted P-K771S-X Medium Skirted P-K772S-B Large Skirted
$4.25
Knob - Rogan, PT Series, 1PS, Small, Skirted, Pointer, Knurled Shaft
High-quality USA made knobs from Rogan Corp. These small, skirted pointer knobs from Rogan’s PT Series feature a soft rubber grip molded over a solid polymer knob. PT Series knobs can be found on synthesizer modules from Make Noise, Mutable Instruments and others. Fits 6mm T18 knurled shafts.
  • Height: 0.71 in.
  • Diameter: 0.57 in.
  • Fits T18 Knurled Shafts

For a D-shaft version of this knob, see P-K281PS-W. A variety of different sizes are available from the PT Series. See the links below for the full selection of knurled shaft knobs from this series. P-K271P-W 1P Small Pointer P-K272P-W 2P Medium Pointer P-K272PS-W 2PS Medium Skirted Pointer
$1.65
Knob - Rogan, PT Series, 2PS, Medium, Skirted, Pointer, Knurled Shaft
High-quality USA made knobs from Rogan Corp. These medium, skirted pointer knobs from Rogan’s PT Series feature a soft rubber grip molded over a solid polymer knob. PT Series knobs can be found on synthesizer modules from Make Noise, Mutable Instruments and others. Fits 6mm T18 knurled shafts.
  • Height: 0.84 in.
  • Diameter: 0.62 in.
  • Fits T18 Knurled Shafts

For a D-shaft version of this knob, see P-K282PS-W. A variety of different sizes are available from the PT Series. See the links below for the full selection of knurled shaft knobs from this series. P-K271P-W 1P Small Pointer P-K271PS-W 1PS Small Skirted Pointer P-K272P-W 2P Medium Pointer
$1.65
Knob - Rogan, PT Series, 1P, Small, Pointer, D-Shaft
High-quality USA made knobs from Rogan Corp. These small pointer knobs from Rogan’s PT Series feature a soft rubber grip molded over a solid polymer knob. PT Series knobs can be found on synthesizer modules from Make Noise, Mutable Instruments and others. Fits 6mm D-shafts.
  • Height: 0.55 in.
  • Diameter: 0.45 in.
  • Fits 6mm D Shafts
  • Indicator on round side of D-shaft

For a T18 knurled version of this knob, see P-K271P-W. A variety of different sizes are available from the PT Series.
$1.65
Knob - Rogan, PT Series, 1PS, Small, Skirted, Pointer, D-Shaft
High-quality USA made knobs from Rogan Corp. These small, skirted pointer knobs from Rogan’s PT Series feature a soft rubber grip molded over a solid polymer knob. PT Series knobs can be found on synthesizer modules from Make Noise, Mutable Instruments and others. Fits 6mm D-shafts.
  • Height: 0.71 in.
  • Diameter:0.57 in.
  • Fits 6mm D Shafts
  • Indicator on round side of D-shaft

For a T18 knurled version of this knob, see P-K271PS-W. A variety of different sizes are available from the PT Series.
$1.65
Evaluation Board - EVB2130-P, SSI2130 VCO, Sound Semiconductor, Fully Populated
The SSI2130 offers unprecedented performance and features, but its ultra-compact QFN package can present prototyping challenges. The EVB2130 eases evaluation by providing a PCB that allows comprehensive exploration of capabilities. The EVB2130-P is fully populated and ready for the bench. With the exception of the SSI2130, all components are through-hole for easy construction and experimentation. A on-board +5V regulator and 2.5V reference simplify external power connections, and pots are provided for mixer control, PWM, and VCO setup. Switches ease selection of saw ramp direction plus Through-Zero and Pulse Modulation. Features
  • PCB size: 108 x 82mm
  • External Power: ±12V
  • Inputs: Expo Freq 1V/Oct PWM In Aux 1 and 2 In FM In PM In Hard Sync Soft Sync
  • Outputs: Sine Saw Triangle Pulse Square Mix Out
$95.00
Op-Amp - LF356, Single, High Slew Rate, 8-Pin DIP
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.
$0.95
Op-Amp - LM3900, Quad, Norton, 14-Pin DIP
LM3900 quad op amp in a 14-pin DIP package. These devices consist of four independent, high-gain frequency-compensated Norton operational amplifiers that were designed specifically to operate from a single supply over a wide range of voltages. Operation from split supplies is also possible. The low supply current drain is essentially independent of the magnitude of the supply voltage. These devices provide wide band- width and large output voltage swing. Features
  • Wide Range of Supply Voltages, Single or Dual Supplies
  • Wide Bandwidth
  • Large Output Voltage Swing
  • Output Short-Circuit Protection
  • Internal Frequency Compensation
  • Low Input Bias Current
  • Designed to Be Interchangeable With National Semiconductor LM2900 and LM3900, Respectively
$0.49
Op-Amp - NE5534, Single, Low Noise, Audio, 8-Pin DIP
NE5534 single op amp in an 8-pin DIP package. The NE5534 device is a high-performance operational amplifier combining excellent dc and ac characteristics. Some of the features include very low noise, high output-drive capability, high unity-gain and maximum-output-swing bandwidths, low distortion, and high slew rate. These operational amplifiers are compensated internally for a gain equal to or greater than three. Optimization of the frequency response for various applications can be obtained by use of an external compensation capacitor between COMP and COMP/BAL.
$0.99
Op-Amp - LM1458, Dual, 8-Pin DIP
LM1458 dual op amp in an 8-pin DIP package. The LM1458 is a general purpose dual operational amplifier. The two amplifiers share a common bias network and power supply leads. Otherwise, their operation is completely independent. Features
  • No Frequency Compensation Required
  • Short-Circuit Protection
  • Wide Common-Mode and Differential Voltage Ranges
  • Low-Power Consumption
  • 8-Lead TO-99 and 8-Lead PDIP
  • No Latch Up When Input Common Mode Range is Exceeded
$1.15
Op-Amp - NE5532, Dual, Low Noise, Audio, 8-Pin DIP
NE5532 dual op amp in an 8-pin DIP package. The NE5532 device is a high-performance operational amplifier combining excellent DC and AC characteristics. They feature very low noise, high output-drive capability, high unity-gain and maximum-output-swing bandwidths, low distortion, high slew rate, input-protection diodes, and output short-circuit protection. These operational amplifiers are compensated internally for unity-gain operation. These devices have specified maximum limits for equivalent input noise voltage. Features
  • Equivalent Input Noise Voltage: 5 nV/√Hz Typ at 1 kHz
  • Unity-Gain Bandwidth: 10 MHz Typ
  • Common-Mode Rejection Ratio: 100 dB Typ
  • High DC Voltage Gain: 100 V/mV Typ
  • Peak-to-Peak Output Voltage Swing 26 V Typ With VCC± = ±15 V and RL = 600 Ω
  • High Slew Rate: 9 V/μs Typ
$0.59