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Project:Traffic Lights: Difference between revisions
From London Hackspace Wiki
→Wiring
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(→Wiring) |
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The traffic light is powered from 90-250v AC (50/60Hz). The controller contains an AC-DC convertor to bring it down to the 3.3V required by the ESP8285. The 4 relays output mains voltage, which is then dropped down to ~12v AC by an individual transformer ''per bulb''. | The traffic light is powered from 90-250v AC (50/60Hz). The controller contains an AC-DC convertor to bring it down to the 3.3V required by the ESP8285. The 4 relays output mains voltage, which is then dropped down to ~12v AC by an individual transformer ''per bulb''. | ||
====Lamp to GPIO mapping==== | |||
{| class="wikitable" | |||
! style="font-weight:bold; background-color:#ffffff;" | Function | |||
! style="font-weight:bold; background-color:#ffffff;" | GPIO Pin | |||
|- | |||
| style="background-color:#ffffff;" | Red Lamp | |||
| style="background-color:#ffffff;" | IO12 | |||
|- | |||
| style="background-color:#ffffff;" | Amber Lamp | |||
| style="background-color:#ffffff;" | IO5 | |||
|- | |||
| style="background-color:#ffffff;" | Green Lamp | |||
| style="background-color:#ffffff;" | IO4 | |||
|} | |||
=== Bulbs === | === Bulbs === | ||
