craigw52’s posterous

I wired in a decoder and used the binary number system to make these numbers appear. #10-#15 do not really work on this type of display and that is why they look the way they do.

                                 

Click here to download:

7-Segment_Readout_with_decoder.zip (1158 KB)

I flipped the switches so they made the numbers 0-9 and then took a picture of each number

                   

Click here to download:

7-Segment_Readout.zip (612 KB)

Wednesday, April 29, 2009
1. By manipulating switches any binary number from 0-15 can be shown on the LED readouts.
        (Not really a question, but I didn't want to start with #2, and skip #1)
2. What switches must be turned on to make the numbers 2, 3, 5, and 13?
        2 - switch #3        3 - switch #3 and #1        5 - switch #6 and #1        13 - #8, #6 and #1
3. What is the maximum count that can be achieved with 3 LED's? With 5 LED's?
        3 LED's = 7        5 LED's = 31
4. What is the relationship between the maximum count that can be achieved with a number of LED's and the weight of the next LED if it were added?
        2^(# of LED's) = the maximum count for that number of LED's        The weight of the next LED added is equal to the maximum weight of all the others combined (it doubles the maximum count)        2^3=8        2^4=16        16-8=8

Using a switch, I  was able to light up multiple LED's....simulating a binary number display. I used the switch numbers 1, 3, 6, and 8.

Tuesday, April 28, 2009
1. Wire the circuit in Figure 10, page 9. Touch the input "probe" wire to the 5V source. What is the result?
        The LED lights up
2. Touch the probe wire to the source ground. What was the result?
        The LED did not light up
3. Explain the operation of this very simple logic probe.
        If there is juice running through the wire, the LED will light up....if there is no juice running through the wire, the LED will not light up

Tuesday, April 28, 2009
When the power source is connected to the wire, juice runs through the wires and lights up the LED. When the power source is not connected to the wire, juice is not running through the system and the LED stays dark

   

Click here to download:

Logic_Probe_1.zip (97 KB)

Monday, April 27, 2009
The LED is lit up from a power supply that is giving off 5 volts of power. The power is being channeled through a resistor of 330 ohms (orange-orange-brown)

   

Click here to download:

a_simple_LED_indicator.zip (161 KB)