Editing Gate (section)

== Payphone Keypad ==
This is some ethernet cable split and used as low-voltage signal wires.

The current wiring of the gate phone keypad, to the brains in the grey box behind, is:

{| class="wikitable"
|+ Wire mapping
! #
! From cable bundle
! To phone component
|-
|1
|Gray wire
|row 1, pin D0
|-
|2
|Green wire
|row 2, D1
|-
|3
|Brown wire
|row 3, D2
|-
|4
|Red wire
|row 4, D3
|-
|5
|Orange wire
|column 1, D4
|-
|6
|Blue wire
|column 2, D5
|-
|7
|Blue + Black dot wire
|column 3, D6
|}
From the phone, there are blue column wires and red row wires.

Added to this, the red LED and front buzzer share a signal wire pair. Green and yellow are used for these. The [[wp:LED]] has bias, a correct direction. The buzzer, phone earpiece, is driven directly by the arduino, using a tone generation library. The LED can be setup alone, and lights on each keypress, to confirm good wiring.

The last 2 white wires are reserved for future use supporting voice from the phone.

https://cdn.discordapp.com/attachments/991541988337909780/1105417542337568818/20230508_223527.jpg

See Discord/#front-gate
https://discord.com/channels/720514857094348840/991541988337909780/1104558594042642476

{{photography}}