Welcome to the N1IR Electronics Website. Totally off the cuff, one take, unrehearsed video projects for anyone interested in amateur radio, electronic design, makers, hardware hackers and science.


Get off you duff and build something!
Training the hand and mind since 1982.

Saturday, February 1, 2014

Logic Demo Board

I've been teaching both the technician and general licence class for amateur radio for a while and have always run into the problem of describing digital logic gate. So I decided to make a very simple demonstration board with various glue logic, AND, NOR, Etc.

Thanks to my student Kim for milling and assembly.


Top Side
 


 Bottom
 
The top switch is power, the bottom two switches are inputs to the gate with LED to indicate the state, the LED top of the IC is the output.


This lay is not traditional, we used thru hole components in a surface mount configuration, I did this so the student can see the connections and trace out the circuit. The switches we used were a donated parts from MASSA Products, LEDS and battery holder were donated from Sager Electronics.