ER-DELAY-02

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Tindie-mediums.png

ER-DELAY-01 FRONT-BACK-720px.jpg

Features

  • PT2399 Delay/Echo
    • The PT2399 is a CMOS single-chip echo processor IC
    • A high sample rate ADC converts the analog data into a bitstream, which is then stored in internal 44Kbit RAM
    • After processing, the bitstream is de-modulated by DAC and lowpass filter
    • The internal VCO clock frequency determines the overall delay duration
    • The user can easily modify the VCO frequency by changing the external resistance
  • Eurorack 3U, 6HP card
  • Built on ER-PROTO-02 card
  • Input attenuator, output amplifier
  • PT2399 has a maximum current of 30mA
  • Jacks
    • J5 IN
    • J6 OUT
  • Controls
    • RV1 - Time
    • RV2 - Reps
    • RV3 - Level
  • 10 pin Eurorack power jack
    • Uses +12V only

Design

  • ER-PROTO-02 card set
    • Front Panel
    • Controls Card
    • Daughtercard

Daughtercard Prototyping Area

ER-PROTO-02-DB REAR PWR.png

U2 - PT2399 Delay IC

ER-DELAY-02 U2 P2399.PNG

U1 - Input Attenuator / Output Amplifier

ER-DELAY-02 OUT-AMP.PNG

J8 - Pots connector on Daughtercard

ER-DELAY-02 J8 CTRL POTS.PNG

J7 - Jacks connector on Daughtercard

ER-DELAY-02 J7 CTRL JACKS.PNG

J9/J15 - Power connector on Daughtercard

ER-DELAY-02 J9 POWER.PNG

U3 - 5V Power Regulator

78L05 pkg.PNG

Schematic

Card Build

  • Controls card rear

ER-DELAY-01 P1090138-720px.jpg

  • Partly built

ER-DELAY-01 P1090064-720px.jpg

  • PT2399 Pin 1 on bottom left

ER-DELAY-01 P1090064-part-720px.jpg

  • Daughtercard

ER-DELAY-01 P1090134-720px.jpg

  • Back of daughtercard

ER-DELAY-01 P1090137-720px.jpg

  • Card Stackup

ER-DELAY-01 P1090135-720px.jpg

  • Front view

ER-DELAY-01 P1090130-720px.jpg

Nets



Measurements

  • Bass Drum echo

ER-DELAY-01 MEASURE-001.png

  • Both Mix/Length knobs full CCW

ER-DELAY-01 MEASURE-002.png

  • All (4) drum triggers on IN

ER-DELAY-01 MEASURE-004 ALL-DRUMS.png

Reference

Videos

  • Kristian Blåsol