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Logic Probe
 

 
  • This is the essential tool in every ones tool box for fhen designing or fixing any digital circuit. The circuit is build around lm339 voltage comparator with selection switch for TTL and CMOS circuits.

    The case files have opening for 3 digit 0.36 voltage meter that are available through eBay or Aliexpress and many other on line stores

    The design of the probe is very easy to understand and has very few components, it is however layed out using 0805 SMD components and for some it may be bit challenging to solder


    Versions of the boards are available on our Tindie store


     

    Features

       Wide input voltage
       CMOS and TTL level selections
       Small outline for very easy handling
       simple passive components - No microcontroller programming

     

      Documents

        Schematic
        PCB (easyEDA)
        3D Top STL file   (LED)
        3D Bottom STL file







 

 
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