View source for SCF-2

[[file: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
* (2) 4-40 mounting holes

=== Schematic ===

[[file: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

[[FILE:SCF-2_J3.PNG]]

* Pinout

# VCC
# VCC
# VP1 - Tip J1
# VR1 - Ring J1 (not used in Synth applications)
# VP2 - Tip J2
# VR2 - Ring J2 (not used in Synth applications)
# GND
# GND

== Mechanicals ==

[[FILE:SCF-2_REV1_MECHS.PNG]]