Free Modular

Drift Assembly Instructions

See general assembly instructions

Components

Most parts are available on Tayda (quick-order CSV).

See general components notes for more info about acquiring parts.

Interactive BOM: front, back

  Board Reference Part Value Source Comment
  Back R1 Resistor 1kΩ Tayda Determines output impedance. Any value is fine.
  Back R2-R4 Resistor 24kΩ Tayda R4 should be 1/2 RV3.
  Back R5 Resistor 1kΩ   Controls LED brightness.
  Back R6, R7 Resistor 100kΩ Tayda  
  Back C1-C4 Capacitor 100nF Tayda Power filtering and decoupling
  Back C5-C7 Capacitor 10uF Tayda Power supply noise filtering capacitor
  Back C8 Capacitor 4.7nF Tayda Optional: This capacitor creates a 1.25kHz lowpass filter with R3 which is applied to the output to smooth out the relatively slow digital sample rate of this module. You can try different values for a smoother signal or leave this out entirely if you don’t mind some high-frequency artifacts.
  Front D1 LED 5mm diffuse orange Tayda Any standard 5mm LED will work here.
  Front J1-J3 3.5mm Jack THONKICONN (a.k.a PJ398SM or PJ301M-12) Tayda  
  Both J4-J7 Pin headers 1x4, 1x6 Tayda (Male, Female), Amazon Solder the two boards directly together using the male headers or make them detachable using a male/female pair.
🔴 Both - Mounting screw M2 McMaster-Carr Optional: add an M2 screw or standoff to hold the two PCBs firmly together.
  Back J9 IDC connector 2x8 Tayda Eurorack power header. Can use two rows of male pin headers or a shrouded connector (recommended).
  Front RV1-RV3 Potentiometer B50kΩ Tayda Any value is fine. Just match R4 accordingly.
  Back A1 Arduino Nano v3.0 Tayda  
🔴 Back U1 DAC MCP4922-E/P DigiKey, Mouser  
  Back U2 Op-amp TL072 Tayda TL082 is probably fine too
  Back U3 Op-amp MCP6002 Tayda, Mouser  
  Back SW1 DIP switches 1x2 Tayda Optional: configuration switches to select noise algorithm. Leave unconnected for the default Perlin noise. You can solder a wire to bridge pairs 1 and/or 2 to select a different mode, or use pair of switches if you want to be able to change it later. See the manual for how to select algorithms.

🔴 = Missing from Tayda BOM