

This repository is used to maintain my work on the software and hardware files for various projects.
- Size
- 68.6 × 53.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 33
- Nets
- 24
- Pads
- 99
- Tracks, vias
- 169, 7
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 13 Mar 2022
- Updated
- 19 Mar 2019
Overview
PRIME D is an open-source printed circuit board by koson, from the koson/Florida-Space-Institute repository on GitHub. It is a 2-layer board of 68.6 × 53.3 mm with 33 parts on 24 nets, routed with 169 tracks and 7 vias.
It is built around the IRLI3705NPBF and ORWH-SH-105D1F,000. Its parts include 16 connectors, 6 resistors, 3 capacitors, 3 diodes and 3 switches.
Main components
2README
KiCad Projects/PRIME-D/README.mdPrime-D
This KiCad project includes both the schematic and pcb-layout for FSI drop tower project "Prime-D". This circuit board should be treated as an Arduino "Shield" and be placed on top of the Arduino Uno socket.

Usage
This project requires KiCad Version 5.0 and after to use.
Software
Again please note that this Prime-D circuit board should be treated as an Arduino Uno shield. Build and flash the Arduion '.ino. file onto the arduino uno board that will be mounted to this Prime-D Arduino Shield.
You can find the software in the Arduino/Prime-D/ folder.
Documents Folder
The documents folder contains;
Parts
33| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 100K | Resistors_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R2, R5, R6 |
| 4 | CONN_01X01 | Socket_Arduino_Uno:Arduino_1pin | P5, P6, P7, P8 |
| 3 | 1uF | Capacitors_THT:C_Axial_L3.8mm_D2.6mm_P7.50mm_Horizontal | C1, C2, C3 |
| 2 | 150 | Resistors_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R3, R4 |
| 2 | GS2 | Connectors:GS2 | J1, J2 |
| 2 | LED | LEDs:LED_D3.0mm | D1, D3 |
| 1 | 1N4007 | Diodes_THT:D_DO-201AD_P5.08mm_Vertical_AnodeUp | D2 |
| 1 | Analog | Socket_Arduino_Uno:Socket_Strip_Arduino_1x06 | P2 |
| 1 | BAT1_27V | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J6 |
| 1 | BAT2_9V | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J7 |
| 1 | BAT3_27V | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J8 |
| 1 | CameraTrigger | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J9 |
| 1 | Connector_Chamber | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J3 |
| 1 | Digital | Socket_Arduino_Uno:Socket_Strip_Arduino_1x08 | P4 |
| 1 | Digital | Socket_Arduino_Uno:Socket_Strip_Arduino_1x10 | P3 |
| 1 | DropSignal | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J10 |
| 1 | IRLI3705N | TO_SOT_Packages_THT:TO-220-3_Horizontal | Q1 |
| 1 | NPN-2N2222 | TO_SOT_Packages_THT:TO-92_Horizontal1_Inline_Narrow_Oval | Q2 |
| 1 | ORWH-SH-105D1F,000 | primeD-kiCad_pcbfootprints:Relay_SPST_ORWH-SH-105D1F,000 | K1 |
| 1 | Power | Socket_Arduino_Uno:Socket_Strip_Arduino_1x08 | P1 |
| 1 | RED-SW_Push_SPDT | primeD-kiCad_pcbfootprints:SPDT_4.7mm | SW1 |
| 1 | SW_DPDT_x2 | primeD-kiCad_pcbfootprints:DPDT_Pitch7-62x6-35mm | SW2 |
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Questions
How big is the PRIME D PCB?
It measures 68.6 × 53.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the PRIME D use?
33 parts, built around the IRLI3705NPBF and ORWH-SH-105D1F,000. 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 PRIME D KiCad files?
From the koson/Florida-Space-Institute repository on GitHub, at the commit this page was made from: the board is KiCad Projects/PRIME-D/PRIME-D.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the PRIME D design in my own project?
Its repository states no licence, so its author keeps all rights: ask koson before reusing the design.