© 2010 Synthwerks LLC All Rights Reserved www.synthwerks.com [email protected] FSR-4C SCALE SCALE SCALE SCALE CHANNEL 1 CHANNEL 2 CHANNEL 3 CHANNEL 4 LOW HIGH LOW HIGH LOW HIGH LOW HIGH THRESHOLD THRESHOLD THRESHOLD THRESHOLD PRESSURE PRESSURE PRESSURE PRESSURE LOW HIGH LOW HIGH LOW HIGH LOW HIGH OUTPUTS OUTPUTS OUTPUTS OUTPUTS PRESSURE PRESSURE PRESSURE PRESSURE GATE GATE GATE GATE GATE GATE GATE GATE QUAD FORCE SENSING RESISTOR CONTROLLER/ LARGE SENSOR COMBO MODULE FSR-4C/B Synthwerks LLC • www.synthwerks.com • [email protected] The Synthwerks FSR-4C/B Quad Force Sensing Resistor Controller/ Large Sensor Combo Module. The FSR-4C/B is another release in Synthwerks’ growing series of modules based on Force Sensing Resistor (FSR) technology. These modules translate the pressure the performer applies to the sensing pads to user adjustable scalable control voltages and adjustable threshold dependent gate signals. The FSR-4C/B in your hands (and soon in your rig) has four identical channels and can produce four independent Pressure Outputs and four separate Gate Outputs. Internal movable jumpers allow any of one the 4 channel Gate or Pressure Output control voltages to be routed to the standard internal CV and gate bus on Doepfer style power bus boards. The FSR-4C/B is a multi-panel module combining the control section (the FSR-4C) with a separate panel of four larger 1.5” square FSR sensors (the FSR-4B). This separate panel is connected via a ribbon cable allowing its placement above, below, or on either side of the main control panel. The Force Sensing Resistor pressure sensor is a non-capacitance based polymer thick film technology, responding to any direct pressure. They are not affected by skin resistance, are water resistant, and never need cleaning or polishing. As force is applied to the sensor, the device’s electrical resistance decreases and the FSR-4C/B’s circuit converts and scales this resistance change into the Pressure Output control voltage. The Pressure Scale control adjusts this voltage range from 0 to over +10 volts. The internal Pressure Output is also read (before the Pressure Scale control) by the Gate Threshold circuit and when this voltage passes a level determined by the Gate Threshold control, a gate is produced at the Gate Output and its corresponding LED will light. The Force Sensing Resistor is an excellent human/ machine interface sensor. You can even play them by pressing on them with other objects or while wearing gloves. Rubber pads and other textured surfaces can be placed on top of the sensors to add a user defined custom feel to the playing surface. FSR-4C/B Quad Force Sensing Resistor Combo Module OUTPUTS OUTPUTS OUTPUTS OUTPUTS PRESSURE PRESSURE PRESSURE PRESSURE GATE GATE GATE GATE GATE GATE GATE GATE LOW HIGH LOW HIGH LOW HIGH LOW THRESHOLD THRESHOLD THRESHOLD PRESSURE PRESSURE PRESSURE PRESSURE HIGH LOW HIGH LOW HIGH HIGH THRESHOLD LOW LOW SCALE SCALE SCALE CHANNEL 1 CHANNEL 2 CHANNEL 3 CHANNEL 4 FSR-4C The FSR-4C Controller Module Each of the four channels contains its own: PRESSURE OUTPUT – A DC voltage whose level is determined by the pressure applied to the SENSOR PAD. The upper voltage range of this CV is increased or decrease by the PRESSURE SCALE control. It’s control range is from no response to pressure at the “LOW” (counter-clockwise) end of the knob’s rotation to full range (a little over +10 Volts) at the far “HIGH” (clockwise) position. GATE OUTPUT – A DC voltage whose level goes high (a little over +5 Volts) when the internal pressure voltage is higher than the value set by the THRESHOLD control. A red LED lights when the GATE OUTPUT is high. This output is not affected by the PRESSURE SCALE settings. Frontpanel Controls and Connections (the FSR-4B) SENSOR PAD – Press on these sensors to produce continuous analog control voltages depending on the level of force applied to their surfaces. Connecting the FSR-4C to the FSR-4B HIGH SCALE Frontpanel Controls and Connections (the FSR-4C) The FSR-4C connects to the FSR-4B via an internal 8-conductor ribbon cable. This allows the FSR-4B to be placed above, below, or on either side of the FSR-4C. The FSR-4C has a ribbon cable soldered to the PCB, with a female header on the nonsoldered end. The FSR-4B has a ribbon cable buss that is plugged into two smaller PCBs and is terminated with a female header. From the factory the female header on the FSR-4B has a male-to-male header inserted into its header. The free end of this male-to-male header is inserted into the ribbon connector on the FSR-4C to complete the circuit. Make sure the red stripe on both ribbon cables are on the same side when connecting the ribbons. Though no damage will result in this cable being inserted backwards, doing so will result in a mismatch between pad numbers and controller channels Internal Jumpers On the PCB, to the right of the power bus connection ribbon cable, you will find two sets of 8-pin headers. Placing a jumper shunt on pairs of theses pins will allow an internal connection to the CV and Gate buses of a Doepfer style power bus connector board. From the factory, units will have two shunts loaded onto one of the pins of both the CV Bus and Gate Bus (not making a connection, just setting on one pin). To make the connection to the CV and Gate buses you must move these shunts to connect the two pins (front and rear pins) of the channel you want to connect to the bus. The Gate and CV signals don’t need to come from the same channel but do not connect more than one CV or more than one Gate to the bus at the same time. Connections to the GATE BUS are on the left (CH1 on the left to CH4 to the right) and the CV BUS are on the right (CH1 on the right to CH4 to the left). If you have another Gate or CV producing module using the bus, DO NOT connect the FSR-4 to the bus. Power connection The FSR-4B Big Sensor Module The leftmost rear ribbon cable (plugged into connector J1) connects the FSR-4 to the power supply and CV and Gate bus. The red stripe on the ribbon cable should be to the far left (marked -12V on the PCB) and should connect to the -12V on the cabinet’s power bus you are mounting the FSR into. *DOUBLE CHECK* this connection before powering up the unit. © 2010 Synthwerks LLC • All R ights R eser ved • w w w.synthwer ks.com • info@synthwer ks.com
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