Project log for Otsi.mk2 focusing on the second revision of PCB’s, this time with improved everything, starting from the new formfactor and on individual components (a lot were replaced) ending.
Info The second PCB hasn’t been fully made so this project log isn’t fully completed at this point
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Overall idea#
This time the idea has changed drastically. First of all, now Otsi is composed of two PCBs.
- The first one being It’s main PCB where battery is placed as well as Pico and all different ICs
- The second one being a UI PCB. That means that there are gonna be placed all the buttons, 0.96inch display and a RGB LED Another change is that right now Otsi is no longer gonna be a handheld but rather a micro laptop of some sort with a lid-mounted main display. Other changes are:
- Different extension ports. This time there are 3x 4pin 3.5mm Audio Jacks that are gonna be connectors for I2C extensions
- Improved ergonomics
- different User Input. From now on Otsi is going to be based around a 5 position button with 3 additional ones.
- Change in the design process. What I mean by that is that this time I haven’t design all the components, for example BMS and multimiter are left for development later.
And here are some of my early ideas of the second design
3D models#
Also, this time I am doing proper 3D models of those PCBs. As of today (03 Apr. 2025) I have only designed a UI PCB but in the near future I’m going to continue the work on a model of main PCB.