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== 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}}
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