Brendan in Tech
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Brendan Koster
Brendan in Tech / Videos

Videos

Build logs and explanations, so you can do it yourself. Many videos exist in Dutch and in English.

@brendanintech

Projects and technology

This channel is for the projects: the onboard computer, the Christmas cards and whatever else is on the workbench.

Unlimited IO for the CYD, I did it 😀8 Sep 2025
Boardcomputer overview short #jlcone5 Jul 2025
DIY Boardcomputer project update #jlcone5 Jul 2025
DIY Boardcomputer switching module14 Feb 2025
DIY digital christmas card14 Dec 2024
Physical digital christmas card (short)13 Dec 2024
Airrohr fine dust sensor (short)12 Nov 2024
Go to the channel
@brendankoster

The first channel

This is where it started, with the first steps of the onboard computer. What I do with it next is still open.

Orion weer lekker op verkenning15 May 2026
Orion weet weer terug te lopen naar de boot15 May 2026
Orion… even nog kijken hoe dit moet heten15 May 2026
DIY boardcomputer GAME Tic Tac Toe17 Apr 2024
DIY boordcomputer SPEL Boter kaas en eieren28 Mar 2024
DIY boardcomputer part 4 shiftregisters 74HC165 and 74HC595 with 4 pins5 Jan 2024
Go to the channel

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Brendan in Tech

Electronics and 3D printing as a hobby, to share and to build.

On this site

  • Onboard computer
  • BKOS
  • Christmas cards
  • Build with me
  • Support
  • Videos
  • About me
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Elsewhere

  • GitHub (software)
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  • YouTube @brendankoster

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© 2026 Brendan Koster. Software under PolyForm Noncommercial; hardware, models and documentation under CC BY-NC-SA 4.0 unless a project says otherwise.