Halfshield
About the Halfshield PCB
Halfshield is an open source PCB design by inaxeon, published on GitHub under the GPL-2.0 license. It is a 2-layer board measuring 34.3 × 53.3 mm, with 23 components from 13 distinct parts.
Other key parts include the EPM7064S. By type, the board carries 7 resistors, 5 connectors, 4 capacitors, 2 transistors and 1 IC.
From the project
This is the source code for an Intel 8086 based micro board
This is the source code for an Intel 8086 based micro board
Full details are here: http://tech.mattmillman.com/projects/8od/
Example "boot from flash" applications for 8OD.
The source code for 8OD's standard bootrom which is used for serial download, to and booting from SPI flash.
Contains an example of how to make an image which runs from EPROM instead of using the standard bootrom. RAM is still required to store the stack and data.
Main components on the Halfshield
Halfshield bill of materials (BOM)
23 components, 13 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | EPM7064S | TQFP-44_10x10mm_Pitch0.8mm | U1 |
| 1 | BC847 | SOT-23 | Q1 |
| 1 | IRLML5203PBF | SOT-23 | Q2 |
| 1 | CONN_02X09 | PIN_ARRAY_9x2 | P1 |
| 1 | HALFGFP | DUINO | P2 |
| 1 | JTAG | PIN_ARRAY_5x2 | P3 |
| 1 | CONN_01X03 | Pin_Header_Straight_1x03 | P4 |
| 1 | CONN_01X02 | Pin_Header_Straight_1x02 | P5 |
| 3 | R_PACK4 | R_Array_Convex_4x0603 | RA1, RA2, RA3 |
| 1 | 10K | POT_SMD | RV1 |
| 4 | 0.1 | C_0603 | C1, C2, C3, C4 |
| 5 | 10K | R_0603 | R2, R3, R4, R5, R6 |
| 2 | 0 | R_0603 | R7, R8 |
Halfshield design files
The KiCad project lives in the inaxeon/eightoduino repository on GitHub; these links point at the commit this page was built from.
Halfshield: common questions
How big is the Halfshield PCB?
The Halfshield measures 34.3 × 53.3 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Halfshield?
23 components, from 13 distinct parts. The full bill of materials is listed on this page.
Where can I download the Halfshield design files?
From the inaxeon/eightoduino repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Halfshield design in my own project?
Yes, under the terms of its GPL-2.0 license, which inaxeon chose for the repository.
