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-QOA74A Diode - OA74A, Amperex, Germanium, Black Glass
NOS OA74A germanium diodes from Amperex. OA74A diodes were used in many vintage electronics and also make for great clipping diodes in stompbox effects pedals. The red end is the cathode. OA74A is a near-exact replacement for OA81.
$1.89
P-Q2N2613 Transistor - 2N2613, Germanium, TO-1 case, PNP
2N2613 PNP germanium transistors. The 2N2613 is a popular PNP for fuzz pedals and other effects. It was used in the Gibson Maestro FZ-1A and the Selmer Buzz Tone. This transistor is in a TO-1 package with long leads commonly found on germanium transistors.
$5.50
P-Q2SD77 Transistor - 2SD77, Germanium, TO-1 case, NPN
2SD77 NPN germanium transistors. The 2SD77 is a popular NPN for fuzz pedals and other effects. The NPN polarity allows for use with standard pedal power supplies.
$1.65
P-Q2N2430 Transistor - 2N2430, Germanium, TO-1 case, NPN
2N2430 NPN germanium transistors. The 2N2430 is a popular NPN for fuzz pedals and other effects. The NPN polarity allows for use with standard pedal power supplies.
$2.45
P-Q2SD104 Transistor - 2SD104, Germanium, TO-1 case, NPN
2SD104 NPN germanium transistors. The 2SD104 is a popular NPN for fuzz pedals and other effects. The NPN polarity allows for use with standard pedal power supplies.
$0.95
P-QAC176 Transistor - AC176, Germanium, TO-1 case, NPN
AC176 NPN germanium transistors. The AC176 is a popular NPN for fuzz pedals and other effects. The NPN polarity allows for use with standard pedal power supplies. The AC176 was designed as the NPN complement to the AC128.
$2.45
S-MHS-ASST-2 Heat Shrink - Assorted Diameters, 2.5" Long, 158 Pieces
2 to 1 heat shrink tubing variety pack. This pack includes six different diameters ranging from 1/16” to 1/2”. Each piece is 2.5” in length. This set comes in a hard plastic case perfect for sorting and storing heat shrink. Features:
  • Resistant to common fluids and solvents
  • UL and CSA listed
  • UV resistant
  • Meets DEF. STAN 59.97
  • Meets UL 224, 125°C and CSA C22.2 No. 198.1
  • Meets MIL-DTL-23053/5 Class 2 & 3
  • Flame retardant (Does not include transparent)
  • Seals and protects cable splices and terminations.
$11.50
S-MHS-ASST-1 Heat Shrink - Assorted Diameters, 6" Long, 24 Pieces
2 to 1 heat shrink tubing variety pack. This pack includes six different diameters with four pieces of each size. Each piece is six inches in length. Features:
  • Resistant to common fluids and solvents
  • UL and CSA listed
  • UV resistant
  • Meets DEF. STAN 59.97
  • Meets UL 224, 125°C and CSA C22.2 No. 198.1
  • Meets MIL-DTL-23053/5 Class 2 & 3
  • Flame retardant (Does not include transparent)
  • Seals and protects cable splices and terminations.
$4.95
S-MHS-ASST-9 Heat Shrink - Assorted Diameters and Colors, 4" Long, 160 Pieces
2 to 1 heat shrink tubing variety pack with multiple colors in each size. This pack includes six different diameters ranging from 1/16” to 3/8”. Each piece is 4” in length. This set comes in a hard plastic case perfect for sorting and storing heat shrink. Features:
  • Resistant to common fluids and solvents
  • UL and CSA listed
  • UV resistant
  • Meets DEF. STAN 59.97
  • Meets UL 224, 125°C and CSA C22.2 No. 198.1
  • Meets MIL-DTL-23053/5 Class 2 & 3
  • Flame retardant (Does not include transparent)
  • Seals and protects cable splices and terminations.

Included Sizes (Diameter):
  • 60 pieces - 1/16 in.
  • 35 pieces - 3/32 in.
  • 25 pieces - 1/8 in.
  • 20 pieces - 3/16 in.
  • 10 pieces - 1/4 in.
  • 10 pieces - 3/8 in.
$16.50
P-QTC1044 Regulator - TC1044, Charge Pump DC-TO-DC Voltage Converter, 8-Pin DIP
TC1044 charge pump voltage converter in an 8 pin DIP package. The TC1044S is a pin-compatible upgrade to the Industry standard TC7660 charge pump voltage converter. It converts a +1.5V to +12V input to a corresponding –1.5V to –12V output using only two low cost capacitors, eliminating inductors and their associated cost, size and EMI. Added features include an extended supply range to 12V, and a frequency boost pin for higher operating frequency, allowing the use of smaller external capacitors. The on-board oscillator operates at a nominal frequency of 10kHz. Frequency is increased to 45kHz when pin 1 is connected to V+.
$2.15
P-PC-R-VAV PCB - Panel Mount Adapter, 9mm Vertical Potentiometer
Package of 5
Small PCB adapter boards to convert PCB mount 9mm vertical pots to wired panel mount pots. These adapters are great for tight builds allowing for more densely populated panels than 16mm options. They’re also a great way to incorporate sealed potentiometers into builds where larger sized options would be cost prohibitive.
$2.25
P-PC-SOT23-123 PCB - SMD to Thru-Hole Adapter, SOT-23 to TO-92, 123 Pinout
Package of 5
PCB for converting SMD SOT-23 transistors and FETs to through hole footprints. This adapter board fits SOT-23 packages. Solder the device to this PCB then attach wires or pin headers (sold seperately) to connect to through hole footprints on PCBs or breadboards. The white box on the PCB can be used to label the part with a marker. See image below for pinout.
$0.95
P-PC-SODIP-14 PCB - SMD to Thru-Hole Adapter, SOIC-14 to DIP-14
Package of 5
PCB for converting SMD SOIC-14 packages to through hole DIP-14 footprints. Solder the device to this PCB then attach pin headers (sold seperately) to connect to through hole footprints on PCBs, breadboards and IC sockets. This adapter is also compatible with SOP-14 packages.
$1.45
P-PC-SODIP6-28 PCB - SMD to Thru-Hole Adapter, SOIC-28 to DIP-28 Wide
PCB for converting SMD SOIC-28-Wide packages to through hole DIP-28 footprints with 0.6" width (wide DIP). Solder the device to this PCB then attach pin headers (sold seperately) to connect to through hole footprints on PCBs, breadboards and IC sockets.
$0.95
P-PC-SSDIP-20 PCB - SMD to Thru-Hole Adapter, SSOP-20 to DIP-20
Package of 5
PCB for converting SMD SSOP-20 packages to through hole DIP-20 footprints. Solder the device to this PCB then attach pin headers (sold seperately) to connect to through hole footprints on PCBs, breadboards and IC sockets.
$1.95
P-PC-QDIP-32 PCB - SMD to Thru-Hole Adapter, QFN-32 to DIP-32
PCB for converting SMD QFN-32 packages to through hole DIP-32 footprints. Solder the device to this PCB then attach pin headers (sold seperately) to connect to through hole footprints on PCBs, breadboards and IC sockets.
$1.05
P-PC-R-VAR PCB - Panel Mount Adapter, 9mm Right Angle Potentiometer
Package of 5
Small PCB adapter boards to convert PCB mount 9mm right angle pots to wired panel mount pots. These adapters are great for tight builds allowing for more densely populated panels than 16mm options. They’re also a great way to incorporate sealed potentiometers into builds where larger sized options would be cost prohibitive.
$2.25
P-PC-LED-DRV PCB - LED Driver, for Pedals and Synths
This small PCB is a simple way to add an indicator light that pulses to the rate of LFOs and clocks used in pedals, synthesizers, and other equipment. Simply connect the positive supply voltage to V+, ground to GND, and the output of a positive signal (0 to V+) such as an LFO or clock to the IN pad. The trimmer can adjust how the LED reacts to the signal. Fully clockwise it will simply pulse on and off when paired with a strong signal. If the signal is a sine, triangle, or any other non-pulse type signal, adjusting the trimmer counter clockwise can dial in settings that follow the shape of the waveform, brightening and dimming with the changing voltage. For certain dual op-amp LFOs in effect pedals, the signal may not go low enough to turn the LED fully off.
$0.65
P-PC-SODIP-8 PCB - SMD to Thru-Hole Adapter, SOIC-8 to DIP-8
Package of 5
PCB for converting SMD SOIC-8 packages to through hole DIP-8 footprints. Solder the device to this PCB then attach pin headers (sold seperately) to connect to through hole footprints on PCBs, breadboards and IC sockets.
$0.95
P-PC-SODIP-16 PCB - SMD to Thru-Hole Adapter, SOIC-16 to DIP-16
Package of 5
PCB for converting SMD SOIC-16 packages to through hole DIP-16 footprints. Solder the device to this PCB then attach pin headers (sold seperately) to connect to through hole footprints on PCBs, breadboards and IC sockets. This adapter is also compatible with SOP-16 packages.
$1.69
P-PC-SSDIP-16 PCB - SMD to Thru-Hole Adapter, SSOP-16 to DIP-16
Package of 5
PCB for converting SMD SSOP-16 packages to through hole DIP-16 footprints. Solder the device to this PCB then attach pin headers (sold seperately) to connect to through hole footprints on PCBs, breadboards and IC sockets.
$1.69
P-PC-SSM2040 PCB - SMD to Thru-Hole Adapter, SSI2140 to SSM2040
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.
$0.95
P-PC-TQDIP-64 PCB - SMD to Thru-Hole Adapter, TQFP-64 to DIP-64 Wide
PCB for converting SMD TQFP-64 packages to through hole DIP-64 footprints with 0.9" width (wide DIP). Solder the device to this PCB then attach pin headers (sold seperately) to connect to through hole footprints on PCBs, breadboards and IC sockets.
$1.35
P-QTL071 Op-Amp - TL071, Single, Low-Noise, JFET-input, 8-Pin DIP
TL071 single op amp in an 8-pin DIP package. The TL07xx JFET-input operational amplifier family is designed to offer a wider selection than any previously developed operational amplifier family. Each of these JFET-input operational amplifiers incorporates well-matched, high-voltage JFET and bipolar transistors in a monolithic integrated circuit. The devices feature high slew rates, low-input bias and offset currents, and low offset-voltage temperature coefficient. The low harmonic distortion and low noise make the TL07xseries ideally suited for high-fidelity and audio pre-amplifier applications.
$0.82