Difference between revisions of "ER-DELAY-01"

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[[File:tindie-mediums.png|link=https://www.tindie.com/products/28896/]]
 
[[File:tindie-mediums.png|link=https://www.tindie.com/products/28896/]]
  
−
[[file:ER-DELAY-01_P1090072-720px.jpg]]
+
[[file:ER-DELAY-01_FRONT-BACK-720px.jpg]]
  
 
== Features ==
 
== Features ==
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* Eurorack 3U, 6HP card
 
* Eurorack 3U, 6HP card
 
* Built on [[ER-PROTO-02]] card
 
* Built on [[ER-PROTO-02]] card
 +
* Input attenuator, output amplifier
 
* PT2399 has a maximum current of 30mA
 
* PT2399 has a maximum current of 30mA
 
* Jacks
 
* Jacks
Line 18: Line 19:
 
** J6 OUT
 
** J6 OUT
 
* Controls
 
* Controls
−
** RV1 In/Out mix
+
** RV1 - In/Out mix
−
** RV2 Delay Length
+
** RV2 - Delay Length
 +
** RV3 - Input Attenuator
 +
** RV4 - Output Gain
 
* 10 pin Eurorack power jack
 
* 10 pin Eurorack power jack
 +
** Uses +12V only
  
 
== Design ==
 
== Design ==
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[[FILE:ER-PROTO-02-DB_REAR_PWR.png]]
 
[[FILE:ER-PROTO-02-DB_REAR_PWR.png]]
  
−
=== Parts Placement ===
+
=== Card Build ===
 +
 
 +
* Controls card rear
 +
 
 +
[[FILE:ER-DELAY-01_P1090138-720px.jpg]]
  
 
* Partly built
 
* Partly built
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[[FILE:ER-DELAY-01_P1090064-part-720px.jpg]]
 
[[FILE:ER-DELAY-01_P1090064-part-720px.jpg]]
 +
 +
* Daughtercard
 +
 +
[[FILE:ER-DELAY-01_P1090134-720px.jpg]]
 +
 +
* Back of daughtercard
 +
 +
[[FILE:ER-DELAY-01_P1090137-720px.jpg]]
 +
 +
* Card Stackup
 +
 +
[[FILE:ER-DELAY-01_P1090135-720px.jpg]]
 +
 +
* Front view
 +
 +
[[FILE:ER-DELAY-01_P1090130-720px.jpg]]
  
 
=== U1 - PT2399 Delay IC ===
 
=== U1 - PT2399 Delay IC ===
Line 48: Line 72:
  
 
=== U3 - Output Amplifier ===
 
=== U3 - Output Amplifier ===
 +
 +
* [https://www.analog.com/en/analog-dialogue/articles/avoiding-op-amp-instability-problems.html Avoiding Op-Amp Instability Problems In Single-Supply Applications]
  
 
[[file:ER-DELAY-01_OUT-AMP.PNG]]
 
[[file:ER-DELAY-01_OUT-AMP.PNG]]
 +
 +
* [https://github.com/land-boards/lb-boards/tree/master/SYNTHS/ER-PROTO-02_SET/ER-DELAY-01/Docs/OUTPUT LTSpice Simulation]
 +
 +
[[file:OUT_AMP_01.PNG]]
  
 
=== J28 - Pots connector on Daughtercard ===
 
=== J28 - Pots connector on Daughtercard ===
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[[file:ER-DELAY-01_J29_JACKS.PNG]]
 
[[file:ER-DELAY-01_J29_JACKS.PNG]]
  
−
=== J9 - Power connector on Daughtercard ===
+
=== J9/J15 - Power connector on Daughtercard ===
  
−
[[file:ER-DELAY-01_POWER.PNG]]
+
[[file:ER-DELAY-01_J9_POWER.PNG]]
  
 
==== U2 - 5V Power Regulator ====
 
==== U2 - 5V Power Regulator ====
Line 139: Line 169:
  
 
[[file:ER-DELAY-01_MEASURE-002.png]]
 
[[file:ER-DELAY-01_MEASURE-002.png]]
 +
 +
* All (4) drum triggers on IN
 +
 +
[[FILE:ER-DELAY-01_MEASURE-004_ALL-DRUMS.png]]
  
 
== Reference ==
 
== Reference ==
  
 
* [https://www.madbeanpedals.com/forum/index.php?topic=29430.0 Little Angel Chorus]
 
* [https://www.madbeanpedals.com/forum/index.php?topic=29430.0 Little Angel Chorus]
 +
* [https://www.analog.com/en/analog-dialogue/articles/avoiding-op-amp-instability-problems.html Avoiding Op-Amp Instability Problems In Single-Supply Applications]
 +
* [https://www.synthrotek.com/kit-assembly-instructions/lofi-synth-kits/pt2399-dev-delay-assembly-instructions/ PT2399 Dev Delay Assembly Instructions]
 +
* [https://www.synthrotek.com/kit-assembly-instructions/lofi-synth-kits/pt2399-dev-delay-assembly-instructions/pt2399-dev-board-bom/ PT2399 Dev Delay BOM]
 +
* [https://store.synthrotek.com/PT2399_Dev_Delay_PCB_ONLY PT2399 Dev Delay PCB]
 +
* [https://note.com/solder_state/n/nf6dc0a61e26d HAGIWO PT2399 clock sync delay]
 +
* [https://www.electrosmash.com/pt2399-analysis PT2399 Analysis bu Electrosmash]
 +
* [https://electricdruid.net/useful-design-equations-for-the-pt2399/ Useful design equations for the PT2399]
 +
* [http://musicfromouterspace.com/analogsynth_new/ECHOFXXX/ECHOFXXX.php MFOS ECHOFXXX]
 +
* [http://www.valvewizard.co.uk/PT2399_Data_Notes.pdf Valve Wizard Additional notes]
 +
* [https://www.schmitzbits.de/pt2399.html schmitzbits PT2399 based Delay]
 +
* [https://benjiaomodular.com/post/2022-09-11-mini-delay/ benjiaomodular MiniDelay]
  
 
== Videos ==
 
== Videos ==

Latest revision as of 17:53, 18 February 2023

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 - In/Out mix
    • RV2 - Delay Length
    • RV3 - Input Attenuator
    • RV4 - Output Gain
  • 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

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

U1 - PT2399 Delay IC

ER-DELAY-01 U1 P2399.PNG

U3 - Output Amplifier

ER-DELAY-01 OUT-AMP.PNG

OUT AMP 01.PNG

J28 - Pots connector on Daughtercard

ER-DELAY-01 J28 POTS.PNG

J29 - Jacks connector on Daughtercard

ER-DELAY-01 J29 JACKS.PNG

J9/J15 - Power connector on Daughtercard

ER-DELAY-01 J9 POWER.PNG

U2 - 5V Power Regulator

78L05 pkg.PNG

J8 - Pots connector on Controls card

ER-DELAY-01 J8 CTRL POTS.PNG

J7 - Pots connector on Controls card

ER-DELAY-01 J7 CTRL JACKS.PNG

Schematic

Nets

+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

  • 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

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