ER-DELAY-01

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Tindie-mediums.png

ER-DELAY-01 P1090130-720px.jpg

Features[edit]

  • 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 - In/Out mix
    • RV2 - Delay Length
    • RV3 - Input Attenuator
    • RV4 - Output Gain
  • 10 pin Eurorack power jack
    • Uses +12V only

Design[edit]

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

Daughtercard Prototyping Area[edit]

ER-PROTO-02-DB REAR PWR.png

Card Build[edit]

  • 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

U1 - PT2399 Delay IC[edit]

ER-DELAY-01 U1 P2399.PNG

U3 - Output Amplifier[edit]

ER-DELAY-01 OUT-AMP.PNG

  • LTSpice Simulation

OUT AMP 01.PNG

J28 - Pots connector on Daughtercard[edit]

ER-DELAY-01 J28 POTS.PNG

J29 - Jacks connector on Daughtercard[edit]

ER-DELAY-01 J29 JACKS.PNG

J9 - Power connector on Daughtercard[edit]

ER-DELAY-01 J9 POWER.PNG

U2 - 5V Power Regulator[edit]

78L05 pkg.PNG

J8 - Pots connector on Controls card[edit]

ER-DELAY-01 J8 CTRL POTS.PNG

J7 - Pots connector on Controls card[edit]

ER-DELAY-01 J7 CTRL JACKS.PNG

Schematic[edit]

Nets[edit]

+5V,C10-1,C18-1,J28-1,U1-1,U2-1,
+12V,C1-1,C2-1,D1-1,J15-1,J15-2,J15-3,J15-4,J15-5,U2-3,
+12VA,J9-10,J9-9,RA1-2,
/IN,C17-2,J29-14,R13-2,
/J4-T,J29-6,
/OUT,C14-2,J29-8,
/P2,C3-1,U1-2,
/P6,R1-1,U1-6,
/P7,C4-1,U1-7,
/P8,C5-1,U1-8,
/P9,C7-1,U1-9,
/P10,C7-2,U1-10,
/P11,C6-1,U1-11,
/P12,C6-2,R3-2,U1-12,
/P13,C8-2,R4-2,U1-13,
/P14,C8-1,R5-2,R9-1,U1-14,
/P15,C11-2,R6-1,R8-1,U1-15,
/P15A,C14-1,R8-2,
/P16,C11-1,R7-1,U1-16,
/P16A,C15-1,C16-1,R12-2,R6-2,R7-2,
/POT1-2,C15-2,J28-18,
/POT1-3,C12-2,J28-19,
/POT3-1,J28-14,
/POT3-2,J28-15,
/POT3-3,J28-16,
/VCO,J28-8,R1-2,
GND,C1-2,C10-2,C13-2,C16-2,C18-2,C2-2,C3-2,C4-2,C5-2,C9-2,J28-20,J29-1,J29-15,J29-16,J9-3,J9-4,J9-5,J9-6,J9-7,J9-8,R13-1,U1-3,U1-4,U2-2,
Net-(C9-Pad1),C9-1,R3-1,R4-1,R5-1,
Net-(C12-Pad1),C12-1,C13-1,R9-2,
Net-(C17-Pad1),C17-1,R12-1,
Net-(D1-Pad2),D1-2,RA1-1,
Net-(J5-PadS),J5-S,J6-R,J7-15,J7-16,
Net-(J5-PadT),J5-T,RB7-1,
Net-(J6-PadS),J6-S,J7-1,J7-2,
Net-(J6-PadT),J6-T,R17-1,
Net-(J7-Pad8),J7-8,R17-2,
Net-(J7-Pad14),J7-14,RB7-2,
Net-(J8-Pad8),J8-8,RV2-1,
Net-(J8-Pad18),J8-18,RB1-2,
Net-(J8-Pad19),J8-19,RV1-3,
Net-(J11-Pad1),J11-1,RV2-2,RV2-3,
Net-(J11-Pad2),J11-2,J14-2,J8-1,J8-20,
Net-(J14-Pad1),J14-1,RV1-1,
Net-(RB1-Pad1),RB1-1,RV1-2,

Measurements[edit]

  • 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[edit]

Videos[edit]

  • Kristian Blåsol