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sudo Sergeant 23: Schematic Design

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Explore Open Source with the sudo Sergeant. Improve your mastery of terminal in various Linux distributions, discuss open source related topics, and more!

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sudo Sergeant
The Learning Circuit
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Felix gives an overview of the schematics used for the Pocket Bagle bela.io Drum Sequencer using KiCad. There are six different schematic sheets for this build.  There are schematics for the Bela PocketBeagle Connections, the 3 Digit 7 segment Display, the LED matrix, the Button Matrix, the Power and Motor Driver, and the Analog and Amplifier.  He'll also let you know what he likes about using KiCad circuit design software, how to work off of a Pocket Beagle template for your design, and what you need to know to get started.

 

Watch the full Episode for this Build: Episode 342: Pocket Beagle bela.io Drum Sequencer

  • Can you please post (when time permits) a PDF of the schematic?  I saw the previous iteration done using Eagle (I am somewhat curious as to why the change over to KiCAD if Eagle was working).  Specifically I am interested in the battery charger system used with this since the Bela/PocketBeagle seems to have battery power inputs already.  As for the rotary encoders that is a bit of a hobby horse of mine.  My guess is you are going to use a polled service loop or one of the PRU's on the PocketBeagle.  For my part I actually designed a mixed-signal FPGA version on a Dialog Semiconductor device for a rotary encoder with built-in and debounced push switch that maintains an independent up-down counter and SPI register.  No need to tie up anything with a polling loop.  Just five grains of rice-sized chips and all your knobs could be done.  Just SPI, a chip select, and one GPIO pin for an interrupt service.  Detailed article on the device at http://www.bifrost-group.com.