The Mysterious 50 Ohm Impedance: Where It Came from and Why We Use It

• rp2040-motor-controller

  7 347 6.9 HTML

  A dual channel brushless motor controller based on the RP2040 microcontroller, designed in Kicad.

  

Kicad is so amazing. Extremely powerful tool with no imposed limits that is completely free and widely used.

I just finished the third rev of my open source low cost high power brushless motor controller in kicad. Open formats means Thea Flowers was able to make a beautiful web viewer that takes a GitHub link to a kicad board or schematic file and displays it for ya. You can see my new board in your browser right here:

https://kicanvas.org/?github=https://github.com/Twisted-Fiel...

I also recently designed a PCB for a friends art project where I needed to place a bunch of LEDs in concentric rings. I used a nice python library for kicad board files to generate a board with all the LEDs placed, then imported the rest of my components and continued with layout as normal.

But beyond the fact that it’s a high quality tool, and has easy to manipulate and read open formats, and loads of easy to use third party tools, is the fact that kicad is and always will be free and open source. That means that when I make my boards open source (and all of my work is open source), I know anyone anywhere in the world can download kicad and use the designs.

I used altium to design some boards at google. It’s clearly a powerful tool. If that’s already what you know, you don’t want to share your designs or collaborate with others who don’t have altium, and you have a license, then go ahead and use it. Or if you want to get a job at a large firm that likely uses altium, then go learn the tool. But if you want to learn a PCB tool for 99% of hobbyist and a good deal of professional work, kicad is likely a better choice.

• InfluxDB

  www.influxdata.com featured

  Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

  

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