Noise Generator on ER-PROTO-01
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Features[edit]
- Eurorack 6HP, 3U module
- Noise Generator
- Based on Moritz Klein's Designing a white, pink & blue noise generator from scratch design
- White, Pink, Blue noise outputs
- Outputs are all buffered
- Built on ER-PROTO-01 card
- 10 pin Eurorack power connector
Noise Generator[edit]
- Credit Moritz Klein's Designing a white, pink & blue noise generator from scratch design
- Noise Generator
- White/Pink/Blue noise
- High Pass Filter (Blue Noise)
- Low Pass Filter (Pink Noise)
Build[edit]
White Noise Generator[edit]
- Voltage Gain = 148
- Switched from TL074 to TL084
- Output seems pretty quiet (~200 mV)
- Offset errors = about 500 mV
- Gain = 148, 500mV = 3.5mV offset voltage
- Add offset voltage trimmer
- Circuit from here
- Schematic with offset
White Noise Scopecaps[edit]
- White Noise Scope capture
- 2 mS / div
- FFT, 25HKz range
Blue Noise Generator[edit]
Blue Noise Screencaps[edit]
- FFT 1mS scope setting
Pink Noise Generator[edit]
Pink Noise Scopecaps[edit]
Pink Noise LTSpice[edit]
Jacks[edit]
Connectors[edit]
J1 - White Output[edit]
- +/- 7.5V swing
J3 - Pink Output[edit]
J4 - Blue Output[edit]
Eurorack Power[edit]
Build Details[edit]
- Three card set
- ER-PROTO-01 Front Panel card
- ER-PROTO-01 Controls card
- ER-PROTO-01 Daughtercard
On Controls Card[edit]
- Install J1, J3, J4
- Wire J1-S to J3-S
- Wire J3-S to J4-S
On Daughtercard[edit]
- Transistor Noise Source wiring
- Opamp wiring