Difference between revisions of "SCF-2"

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(Created page with "file:SCF-2_REV 1_FRONT_3D.png")
 
 
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[[file:SCF-2_REV 1_FRONT_3D.png]]
 
[[file:SCF-2_REV 1_FRONT_3D.png]]
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== Features ==
 +
 +
* Digital Inputs or Outputs
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* (2) 3.5mm Jacks
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* Scaling resistors
 +
* Schottky Clamping Diodes
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* Filter cap
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* Ring pin brought to connector
 +
** Ring pin is not used in Synth applications
 +
** Card can be used as a 3.5mm breakout (1x5 vertical header mounted to rear)
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* (2) 4-40 mounting holes
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* 36mmx28mm
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=== Schematic ===
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[[file:SCF-2_Channel_Schematic.PNG]]
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==== Used as Digital Input ====
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* 550K input impedance presents light load
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* R1/R3 - Input scale resistors
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** Ex: 5.0V control voltage to 3.0 V
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* Clipping diodes protect inputs
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* R1/C1 create input filter = 2.2mS = 454 Hz
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 +
==== Used as Digital Output ====
 +
 +
* Drive with 5V low output impedance source
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* DNP R3, C1
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* Use lower value for R1 (typically 200 Ohms, etc)
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* Can leave Clipping Diodes to protect driver
 +
 +
== Connectors ==
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=== J1, J2 - 3.5mm Jacks ===
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* Tip
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* Sleeve
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=== J3 - I/O Connector ===
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* 2x4 Header, 0.1"
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* Either 2x4 (Stereo) or 1x4 (mono)
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** Install 1x4 on 1,3,5,7 pointing down for breadboard
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[[FILE:SCF-2_J3.PNG]]
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* Pinout
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# VCC
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# VCC
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# VP1 - Tip J1
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# VR1 - Ring J1 (not used in Synth applications)
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# VP2 - Tip J2
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# VR2 - Ring J2 (not used in Synth applications)
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# GND
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# GND
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== Build Options ==
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 +
[[FILE:SCF-2_REV1_CAD.PNG]]
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* D1-D3 = Clamping diodes
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* R1, R2 = Series resistor
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* R3, R4 - scaling resistors
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* C1, C2 - Parallel capacitor
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* J3, 1x4 or 2x4 (above)
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=== Build as Adapter (No SCF) ===
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* Just install 0 Ohms series resistor at R1, R2
 +
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=== Build as Buffered Connection===
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* Install series resistors at R1, R2
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=== Build as Filter Without Clamping ===
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* R1/C1 filter
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* R2/C2 filter
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== Mechanicals ==
 +
 +
[[FILE:SCF-2_REV1_MECHS.PNG]]

Latest revision as of 21:47, 4 October 2022

SCF-2 REV 1 FRONT 3D.png

Features

  • Digital Inputs or Outputs
  • (2) 3.5mm Jacks
  • Scaling resistors
  • Schottky Clamping Diodes
  • Filter cap
  • Ring pin brought to connector
    • Ring pin is not used in Synth applications
    • Card can be used as a 3.5mm breakout (1x5 vertical header mounted to rear)
  • (2) 4-40 mounting holes
  • 36mmx28mm

Schematic

SCF-2 Channel Schematic.PNG

Used as Digital Input

  • 550K input impedance presents light load
  • R1/R3 - Input scale resistors
    • Ex: 5.0V control voltage to 3.0 V
  • Clipping diodes protect inputs
  • R1/C1 create input filter = 2.2mS = 454 Hz

Used as Digital Output

  • Drive with 5V low output impedance source
  • DNP R3, C1
  • Use lower value for R1 (typically 200 Ohms, etc)
  • Can leave Clipping Diodes to protect driver

Connectors

J1, J2 - 3.5mm Jacks

  • Tip
  • Sleeve

J3 - I/O Connector

  • 2x4 Header, 0.1"
  • Either 2x4 (Stereo) or 1x4 (mono)
    • Install 1x4 on 1,3,5,7 pointing down for breadboard

SCF-2 J3.PNG

  • Pinout
  1. VCC
  2. VCC
  3. VP1 - Tip J1
  4. VR1 - Ring J1 (not used in Synth applications)
  5. VP2 - Tip J2
  6. VR2 - Ring J2 (not used in Synth applications)
  7. GND
  8. GND

Build Options

SCF-2 REV1 CAD.PNG

  • D1-D3 = Clamping diodes
  • R1, R2 = Series resistor
  • R3, R4 - scaling resistors
  • C1, C2 - Parallel capacitor
  • J3, 1x4 or 2x4 (above)

Build as Adapter (No SCF)

  • Just install 0 Ohms series resistor at R1, R2

Build as Buffered Connection

  • Install series resistors at R1, R2

Build as Filter Without Clamping

  • R1/C1 filter
  • R2/C2 filter

Mechanicals

SCF-2 REV1 MECHS.PNG

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