describe the use of feedback to make a rising edge triggered Dtype flipflop divide by 2;
design 4bit up or down counters based on rising edge triggered Dtype flipflops, and draw timing diagrams for these counters;
design 4bit moduloN counters based on rising edge triggered Dtype flipflops, and draw timing diagrams for these counters;
convert a 4bit binary number to decimal or hexadecimal notation;
describe the use of a BCD or hexadecimal decoder with a seven segment display.
What do you notice about the output compared to the input? 
What do you notice about the output trace B? 



What is the maximum decimal number that this counter can count to? 
Why is the circuit above a Modulo12 counter? 
What kind of display is the one above? 
A 1200 mAh battery is used to power a seven segment display which is showing the number 8. How long will it last? 
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