With version 1.4 I have a working prototype with a panel. These make mounting it in a case possible. There are still some minor issues I want to fix before releasing it to the public. I build Dotty so I know what to expect. But I would be nice to have some feedback.
This topic is mainly for those whom received or are going to receive a 1.4 prototype version. I hope It helps with the build and explain some of the features. If you haven’t received a Dotty but curious on what it can do, keep on reading.
Overview
Dotty is a trigger sequencer. When I made Dotty I wanted control over my drum sounds. Dotty is going to be the drummer controlling the drums in my rack. I can control other things too. It outputs triggers on 8 channels/tracks. Short pulses of 5 volts, currently it is set to 4ms pulses.
I wanted more control over drums in a live situation. The selected track is programmable with 16 buttons. One tracks has 16 steps, each step controlled by a button. The tracks can be selected with the smaller buttons. There are some extra buttons that will give some more control in a live setup. Like recording a step or filling the drum for a drum-roll.
From a builders point of view it needed to be easy build, keeping cost low and no smd.
Features
- 8 Track trigger sequencer
- 16 Banks of 8 tracks
- 16 Steps track
- Each track has two parts (making it 32 steps)
- Preset tracks with fast loading
- Save and loading (tracks, banks and settings)
- Copy and paste functions
- Internal and external clock
- Input for reset clock
- Led Matrix to visualize settings and tracks/steps
- Clock menu with divider and more
- 4 FX buttons attachable to functions (not implemented in beta)
- Reverse
- 2 step
- Hold
- Record Step
- Fill
- Fill Randomly
- More to come..
And more to come
Bill of Materials v1.4
| A1 | 1 | Arduino_Nano_v2.x |
| C1,C2,C3,C4,C9,C10 | 6 | 100nf |
| C6 | 1 | 47uf |
| C8 | 1 | 3.3uf |
| D6 | 1 | 1n4001 |
| 3 | Led Matrix | |
| J1, J2, J3, J4, J5, J6, J15, J16, J22, LJ12_Out1, LJ56_Out1 | 11 | 1×4 Pin headers (male) |
| J10, J11, J12, J13, J14, J23, LJ12_In1, LJ56_In1 | 11 | 1×4 Pin headers (female) |
| J17 | 1 | 10 pin IDC (eurorack power) |
| 11 | Thonkyconn jacks | |
| Q1, Q2, Q3 | 3 | 2N3904 |
| R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, R17, R18, R19, R20, R21, R22, R23, R24, R25, R26, R27, R28, R29, R30, R31, R32, R35, R36, R37, R38, R43, R44,R45, R46 | 40 | 10K Resistors |
| R33, R34 | 2 | 100K Resistors |
| SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8, SW9, SW10, SW11, SW12, SW13, SW14, SW15, SW16, SW17, SW18, SW19, SW20, SW21, SW22, SW23, SW24, SW25, SW26, SW27, SW28, SW29, SW30, SW31, SW32, SW33, SW34, SW35, SW36 | 36 | Buttons |
| 28 | Button Caps Big | |
| 8 | Button Caps Small | |
| U1, U2, U3, U4 | 4 | 74HC4051 |
| U6 | 1 | L78L05 |
| U7 | 1 | 74HC595 |