Keymatrix Daughterboards

Keymatrix Inputs

The PHCC system allows you to connect up to 1024 boolean (on/off) inputs. This should be sufficient for most simbuilder's needs (but no all as I've heard :-)

This allows you to connect for example:

• MCP/Autopilot panel
• MIP (main instrument panel)
• CDUs
• pedestal
• overhead
• circuit breakers
• ...

These inputs are arranged in a matrix. The matrix consists of eight columns and 128 rows. The rows are organized in 16 groups of 8 rows. This translates into 16 keymatrix daughterboards with each 64 inputs (arranged as an 8x8 matrix).

Theory of Operation

• electrical: PHCC_key_overview.png (15k)
• mechanical/wiring of switches: PHCC_key64d_PH_switch_wiring.png (58k)

Available or planned PHCC Keymatrix Input Daughterboards

KEY64D_PH

Features:

• 64 inputs
• no ghosting as each input is diode protected
• connectors: pinheaders for IDC ribbon flat cables
• board size: 80x100mm (1/2 euro size)

Schematic and Layout

This section explains how to put the parts together. Soldering may be required.

[[Image:]] [1]
[[Image:]] [2]

Bill of Materials

The BOM is here: PHCC_KEY64D_PH.BOM.txt
This list includes prices and links to to online catalogue pages of my primary source of electronics components, Reichelt Elektronik

KEY64D_SC35

Features:

• 64 inputs
• no ghosting as each input is diode protected
• connectors: screw clamp terminals, 3.5mm spaced
• board size: 100x160mm (euro size)

Schematic and Layout

[[Image:]] [3]
[[Image:]] [4]

Bill of Materials

The BOM is here: bom_key64d_sc35.txt
This list includes prices and links to to online catalogue pages of my primary source of electronics components, Reichelt Elektronik