Moirai
About the Moirai PCB
Moirai is an open source PCB design by Zachary-Pearce, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 132.6 × 85.7 mm, with 37 components from 16 distinct parts.
Other key parts include the 74LS279, 74HC00 and AMS1117-5.0. By type, the board carries 14 resistors, 8 capacitors, 5 transistors, 4 ICs, 3 connectors and 3 diodes.
From the project
A 3-channel majority voter for redundant flight computer systems.
Moirai is a 3-Channel majority voter for redundant flight computer systems made with KiCad. It allows you to properly implement redundant systems in hobby rockets whether they be high power or low power.
2. Open the folder in KiCad and confirm the local libraries have been imported.
Before deciding to get this PCB for yourself, I reccomend that you read the full manual present in the wiki.
Main components on the Moirai
Moirai bill of materials (BOM)
37 components, 16 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 74LS279 | DIP-16_W7.62mm | U1 |
| 2 | 74HC00 | DIP-14_W7.62mm | U2, U3 |
| 1 | AMS1117-5.0 | SOT-223-3_TabPin2 | U4 |
| 3 | BS170 | TO-92_Inline | Q1, Q2, Q3 |
| 1 | BC850 | SOT-23 | Q4 |
| 1 | IPP80P03P4L-04 | TO-220-3_Vertical | Q5 |
| 1 | Conn_01x02 | AMASS_XT30U-M_1x02_P5.0mm_Vertical | J1 |
| 1 | Screw_Terminal_01x02 | TerminalBlock_WAGO_236-402_1x02_P5.00mm_45Degree | J2 |
| 1 | Screw_Terminal_01x06 | TerminalBlock_WAGO_236-406_1x06_P5.00mm_45Degree | J3 |
| 3 | 15V | D_SMA | D1, D2, D3 |
| 3 | 0.1uF | C_0805_2012Metric | C1, C5, C6 |
| 3 | 1uF | C_0805_2012Metric | C2, C3, C4 |
| 1 | 10uF | C_0805_2012Metric | C7 |
| 1 | 22uF | C_0805_2012Metric | C8 |
| 3 | 330R | R_0805_2012Metric | R1, R4, R7 |
| 11 | 10kR | R_0805_2012Metric | R2, R3, R5, R6, R8, R9, R10, R11 +3 |
Moirai design files
The KiCad project lives in the Zachary-Pearce/Moirai repository on GitHub; these links point at the commit this page was built from.
- Layoutsrc/Moirai.kicad_pcb
- Schematicsrc/Moirai.kicad_sch
Moirai: common questions
How big is the Moirai PCB?
The Moirai measures 132.6 × 85.7 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Moirai?
37 components, from 16 distinct parts. The full bill of materials is listed on this page.
Where can I download the Moirai design files?
From the Zachary-Pearce/Moirai repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Moirai design in my own project?
Yes, under the terms of its GPL-3.0 license, which Zachary-Pearce chose for the repository.