First of all thanks to DangerousPrototypes! its because of you guys I worked on logic gates after college – else its usually the usual microelectronic stuff! :)

This build is a simple ‘Tic Tac Toe’ game. I ended up using 30 Logic ICs ! :)

Lets see the video first, then lets see the design



Design document:

<PDF alert> This document: Tic_Tac_Toe has all the block diagrams and circuit diagram used.



In the middle of the build

Tic Tac Toe

Tic Tac Toe


Do leave a comment if you have any queries!

PS:  The casing is ugly :P Trying to build a good case for this project!

<Edit> Won a first place in the 7400 contest !


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35 Responses to “Tic_Tac_toe”

  1. [...] another entry in the 7400 Logic contest. [Circuitchef] used gates and a few flip-flops to build a two-player electronic Tic-Tac-Toe game. The full details or shared in the PDF file he links to in his post. We’ve also linked to it [...]

  2. [...] another entry in the 7400 Logic contest. [Circuitchef] used gates and a few flip-flops to build a two-player electronic Tic-Tac-Toe game. The full details or shared in the PDF file he links to in his post. We’ve also linked to it [...]

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