Slew Rate Controller on ER-PROTO-01

Features

• Simple dual slew rate limiter
• Used for portamento effects or to smooth out a stepped voltage from a sequencer, or for general audio or CV smoothing
• Each channel contains a buffer with 100K input impedance suitable for pitch CVs
• The slew pot affects the charging of a large capacitor connected to a second amplifier
• The second amp provides buffering for output to isolate the output jack from the actual slewing function
• Control range of 0-10s (approx.)
• Power: +12V @ 5mA, -12V @ 5mA

Credits

• Dintree D107-Slew
• Schematic

Jacks/Controls

• 2 Slew Rate adjustment Pots
• 4 Jacks
  • 2 Input jacks
  • 2 Output jacks

Wiring

Pots on Controls Card

• Install 100 Ohms resistor at R1, R2
• Install B100K at RV1, RV2
• Add wire RV1-1 to RV1-2
• Add wire RV2-1 to RV2-2

Jacks on Controls Card

• Install J1-J4
• Add wire J1-S to J3-S
• Add wire J3-S to J4-S
• Add wire J2-S to J4-S

J6 - Eurorack Power Jack

• Install 14 pin socket for U1
  • Orient socket so Pins 1-7 face +12V bus (right side)
• Add wire U1-4 to +12V
• Add wire U1-11 to -12V
• Install 10 pin IDC connector at J6
  • Pin 1 to "STRIPE"

Input Buffers

• Node: J1-T, J38-8 to first open row left side center of 3 pins
• R3: 100K ohm from first open row left side right of 3 pins to GND (don't solder yet)
• R6: 1K ohm from first open row left side left pin to next open row
• Wire R6 new side to U1-
• Node: J2-T, J38-4 to first open row right side center of 3 pins
• 100K ohm from first open row right side left of 3 pins to GND

Output Buffers