Fuelino Proto3 development with Eagle

In the last few days, I was busy with Eagle, trying to design the PCB of the new Fuelino Proto3. Compared to the previous Proto2, this new prototype has the following changes:

  • Fixed some problems about the position of the LEDs. Since there is not much space left on the board, I decided to remove the 2 LEDs connected to Cylinder #2 input and output commands. I substituted them with simple resistors. There are still 2 LEDs for Cylinder #1.
  • I added an additional SPI connector (6-pins), therefore the SPI connectors are now 2. This allows, for example, to connect a Catalex Micro SD card module, and a Wi-Fi module, at the same time.
  • Some improvements about GND and power supply areas. These areas have been enlarged, in order to reduce the resistance, and improve immunity to noise.

fuelino_proto3_eagleBefore sending the Gerber data to the PCB supplier, I am still performing some double checks, to make sure that there is no wrong electrical connection (like short circuits between different polygons). By the way, I found many interesting websites (online Gerber viewers) which show the pictures of the Gerber file layers. During the design of these Fuelino boards, I also found interesting the guide on SparkFun website, which explains how to export the Gerber files starting from the schematic and board created with Eagle.

Author: Davide Cavaliere

I am an Italian Electrical Engineer graduated at Politecnico di Milano. My interests are motorcycles and cars, electronics, programming, Internet of Things, and Japanese culture.

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