ER-STIX
Contents
Features
- Similar to Mutable Instruments Branches
- Dual Bernoulli Gate
- Differences vs Braids
- Only has 1 GATE input
- No push buttons
- 0-5V input/outputs
- Built on ER-PROTO-02
- Arduino Pro Mini
= Operation
- Receives single Gate on J1
- RV1 controls OUT 1
- RV2 controls OUT 2
Arduino Pro Mini
Controls
- RV1 - Probabilistic ratio for Output 1
- Center = 50-50, CCW = Out1A on 100%, CW = 0% on OUT1B
- Inserting J3 jack disables RV1
- RV2 - Probabilistic ratio for Output 2
Jacks
J1 - Gate
- 0.6V threshold GATE input
J2 - Random %
- 0-5V control input
- Inserting jack disables RV1
- 0V = 100% on OUT1A, 2.5V = 50% on OUT1A/OUT1B, 5V = 100% on OUT1B
J3 - Out1A
- Gate output 1
- 0-5V digital output
J4 - Out1B
- Gate output 1
- 0-5V digital output
J5 - Out2A
- Gate output 2
- 0-5V digital output
J6 - Out2B
- Gate output 2
- 0-5V digital output
Software
- Arduino IDE
- Pot/GATEs Test
- Reads pots, write values to serial
- Toggles GATE outs - one at a time
- Simplest Version 1
- 2 pots, one for OUT1A/B, other for OUT2A/2B
- Still pretty simple - Version 2
- Adds (2) mode control knobs
- 7 o-clock = 12 o'clock = Normal mode
- 12 o-clock - 5 o=clock = Send Outputs on both OUTxA and OUTxB
Parts List
| Find | Qty | Ref Des | Part Number |
|---|---|---|---|
| 1 | 1 | R35 | 1K |
| 2 | 1 | C1 | 10uF |
| 3 | 5 | D1-D5 | BAT41 |
| 4 | 1 | J9 | Conn, IDC, Box, 2x5 |
| 5 | 2 | LED1, LED2 | LED_Dual_2pin |
| 6 | 1 | Q1 | 2N3904 |
| 7 | 1 | R1 | 10 |
| 8 | 1 | U1 | ARDUINO PRO MINI |
| 11 | 6 | RX2, RX7, RX9, RX15, RX17 | 1K |
| 12 | 2 | RVX1, RVX2 | 100K |
| 13 | 2 | RX3, RX4 | 220 |
| 14 | 2 | RX11, RX13 | 100K |
| 7 | 6 | JX1-JX6 | Jack |
