Traffic light
About the Traffic light PCB
Traffic light is an open source ESP8266 PCB design by iley, published on GitHub. It is a 2-layer board measuring 35 × 130 mm, with 50 components from 12 distinct parts.
Its main chip is the ESP-12F, from the ESP8266 family. Other key parts include the AMS1117-3.3. By type, the board carries 23 resistors, 15 diodes, 3 transistors, 3 capacitors and 2 ICs.
It belongs with the iot & wireless designs in this gallery.
From the project
WiFi-controlled traffic light
This is a hacked toy traffic light. It uses ESP-8266.
Main components on the Traffic light
Traffic light bill of materials (BOM)
50 components, 12 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ESP-12F | ESP-12E_SMD | U1 |
| 1 | AMS1117-3.3 | SOT-223-3_TabPin2 | U2 |
| 3 | BS170 | TO-92_Inline | Q1, Q2, Q3 |
| 1 | RESET | SW_PUSH_6mm | BTN1 |
| 1 | FLASH | SW_PUSH_6mm | BTN2 |
| 1 | Serial | PinHeader_1x04_P2.54mm_Vertical | UART1 |
| 1 | Power | PinHeader_1x02_P2.54mm_Vertical | VIN1 |
| 15 | LED | LED_D5.0mm | D1, D2, D3, D4, D5, D6, D7, D8 +7 |
| 1 | 0.1uF | C_1206_3216Metric | C1 |
| 2 | 10uF | C_1206_3216Metric | C2, C3 |
| 8 | 10K | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R1, R7, R13, R19, R20, R21, R22, R23 |
| 15 | R | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R2, R3, R4, R5, R6, R8, R9, R10 +7 |
Traffic light design files
The KiCad project lives in the iley/traffic-light repository on GitHub; these links point at the commit this page was built from.
Traffic light: common questions
What microcontroller does the Traffic light use?
The Traffic light is built around the ESP-12F, from the ESP8266 family.
How big is the Traffic light PCB?
The Traffic light measures 35 × 130 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Traffic light?
50 components, from 12 distinct parts. The full bill of materials is listed on this page.
Where can I download the Traffic light design files?
From the iley/traffic-light repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Traffic light design in my own project?
The repository has no license, so all rights stay with iley. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Traffic light without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP8266 firmware against it before you order a PCB.
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