Difference between revisions of "ER-DELAY-02"
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** The internal VCO clock frequency determines the overall delay duration | ** The internal VCO clock frequency determines the overall delay duration | ||
** The user can easily modify the VCO frequency by changing the external resistance | ** The user can easily modify the VCO frequency by changing the external resistance | ||
| + | * Design based on [https://benjiaomodular.com/post/2022-09-11-mini-delay/ Benjie MiniDelay] | ||
* Eurorack 3U, 6HP card | * Eurorack 3U, 6HP card | ||
* Built on [[ER-PROTO-02]] card | * Built on [[ER-PROTO-02]] card | ||
| Line 115: | Line 116: | ||
== Reference == | == Reference == | ||
| + | * [https://benjiaomodular.com/post/2022-09-11-mini-delay/ Benjie MiniDelay] | ||
* [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.analog.com/en/analog-dialogue/articles/avoiding-op-amp-instability-problems.html Avoiding Op-Amp Instability Problems In Single-Supply Applications] | ||
| Line 130: | Line 132: | ||
== Videos == | == Videos == | ||
| − | + | <video type="youtube">J1iM1wNb09Q</video> | |
| − | |||
| − | <video type="youtube"> | ||
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| − | |||
Latest revision as of 20:17, 20 February 2023
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
- Design based on Benjie MiniDelay
- 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
U2 - PT2399 Delay IC
U1 - Input Attenuator / Output Amplifier
J8 - Pots connector on Daughtercard
J7 - Jacks connector on Daughtercard
J9/J15 - Power connector on Daughtercard
U3 - 5V Power Regulator
Schematic
Card Build
- Controls card rear
- Partly built
- PT2399 Pin 1 on bottom left
- Daughtercard
- Back of daughtercard
- Card Stackup
- Front view
Nets
Measurements
- Bass Drum echo
- Both Mix/Length knobs full CCW
- All (4) drum triggers on IN
Reference
- Benjie MiniDelay
- Little Angel Chorus
- Avoiding Op-Amp Instability Problems In Single-Supply Applications
- PT2399 Dev Delay Assembly Instructions
- PT2399 Dev Delay BOM
- PT2399 Dev Delay PCB
- HAGIWO PT2399 clock sync delay
- PT2399 Analysis bu Electrosmash
- Useful design equations for the PT2399
- MFOS ECHOFXXX
- Valve Wizard Additional notes
- schmitzbits PT2399 based Delay
- benjiaomodular MiniDelay
Videos
