4 layers215 × 126.9 mm
Mega65-r3-expansion board.kicad
MEGA65/mega65-r3-expansion-board
Expansion board for the MEGA65 R3+ Main Boards
115 parts8
2 layers52.8 × 58.9 mm
Shift triggers
x37v/shift-triggersshift register based triggers for modular synth
- Size
- 52.8 × 58.9 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 53
- Nets
- 47
- Pads
- 148
- Tracks, vias
- 153, 7
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 22 Dec 2018
- Updated
- 22 Dec 2018
Overview
Shift triggers is an open-source printed circuit board by x37v, from the x37v/shift-triggers repository on GitHub. It is a 2-layer board of 52.8 × 58.9 mm with 53 parts on 47 nets, routed with 153 tracks and 7 vias.
It is built around the 74LS125DC and 74HC595. Its parts include 17 resistors, 6 capacitors, 4 ICs and 3 connectors. It belongs with the audio and music boards of this library.
Main components
274LS125DC
-0℃~+70℃ 1 10ns@5.5V,50pF 15mA 18mA 24mA 4 4.5V~5.5V 74LS Power-off isolation、Output enable Tri-State Unidirectional - Buffers, Drivers, Receivers, TransceiversTexas InstrumentsBuffers, Drivers, Receivers, Transceivers
74HC595
SOP-16-40℃~+85℃ 1 100ns@5V,50pF 10MHz 2V~6V 74HC 8 Serial-to-Serial or Parallel Tri-State SOP-16 Shift Registers ROHSGRShift Registers
README
README.mdshift-triggers
This is a kicad pcb/schematic project for driving modular synthesizer triggers with a few pins on a microcontroller using a shift register.
It provides 16 trigger outputs, an optional 3v->5v set of inputs, and the ability to cascade several boards.
It uses an MTA style connector for power, and should be able to be driven by 12 or 15v, probably even 9.
License
shift-triggers by Alex Norman is licensed under a Creative Commons Attribution 4.0 International License.
Based on a work at https://github.com/pichenettes/eurorack/tree/master/grids/hardware_design.
Thanks
Thanks to Mutable Instruments for providing example schematics. I modeled these triggers off the Grids schematic.
Parts
53| Qty | Value | Footprint | References |
|---|---|---|---|
| 16 | 1k | Resistors_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16 |
| 4 | MountingHole_3.2mm_M3 | Mounting_Holes:MountingHole_3.2mm_M3 | REF1, REF2, REF3, REF4 |
| 3 | 100n | Capacitors_THT:C_Disc_D3.4mm_W2.1mm_P2.50mm | C1, C2, C6 |
| 2 | 100n | Capacitors_THT:C_Disc_D4.3mm_W1.9mm_P5.00mm | C4, C5 |
| 2 | 74HC595 | Housings_DIP:DIP-16_W7.62mm_LongPads | U1, U2 |
| 1 | 10uF | Capacitors_THT:CP_Radial_D7.5mm_P2.50mm | C3 |
| 1 | 74LS125 | Housings_DIP:DIP-14_W7.62mm_LongPads | U4 |
| 1 | 7805 | TO_SOT_Packages_THT:TO-220_Vertical | U3 |
| 1 | MTA-156-4 | mta-156:MTA-156-4 | P3 |
| 1 | bead | Resistors_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R17 |
| 1 | digicascade | Pin_Headers:Pin_Header_Straight_1x04_Pitch2.54mm | P2 |
| 1 | digiin | Pin_Headers:Pin_Header_Straight_1x04_Pitch2.54mm | IN-5v |
| 1 | digiin-3v | Pin_Headers:Pin_Header_Straight_1x04_Pitch2.54mm | IN-3v |
| 1 | gnd | Pin_Headers:Pin_Header_Straight_1x01_Pitch2.54mm | GND |
| 1 | output | Pin_Headers:Pin_Header_Straight_1x16_Pitch2.54mm | J1 |
The 37 most common of 53 parts.
Questions
How big is the Shift triggers PCB?
It measures 52.8 × 58.9 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Shift triggers use?
53 parts, built around the 74LS125DC and 74HC595. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Shift triggers KiCad files?
From the x37v/shift-triggers repository on GitHub, at the commit this page was made from: the board is shift-triggers.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Shift triggers design in my own project?
Its repository states no licence, so its author keeps all rights: ask x37v before reusing the design.
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