t h calasanz

class syllabus   and   methodology
laboratory report on learning elements

Class Projects (presented on 12 march 2002)
           - announcement for 12 march 2002 presentations
           - closing statement for course

information specific to :
           - PS 141B (tuesday)
           - PS 141C (thursday)
           - names of 141B & 141C students

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1 - who are 1's and 0's anyway?
      laboratory report on learning elements

• highs are "1's", lows are "0's"
  "1's" are between 2.4 and 5.0 volts and
  "0's" are between 0 and 0.8 volt
• visually telling one from another   /   further detailed explanation
• making "1's" and "0's" run   /   further detailed explanation
• christmas lights

2 - counting up and down
      laboratory report on learning elements
    ( christmas lights with 7442 / 7490 / 7493 / 74193 / 7442 / 7447 )

counting - hardware style

• decimal "1" to "10"



• binary "0" to "1111"



• hexadecimal "0" to "F"

3 - making decisions (logic gates / selectors / multiplexer / demultiplexer)
      laboratory report on learning elements

• check the existence of two or more 1's with a 2-input NAND gate
  ___gif image___
  ___pdf version___

 
• check the existence of two or more 0's with a 2-input OR gate
  ___gif image___
  ___pdf version___

 
• detect the existence of any condition or combination of 1's and 0's
  a) build this circuit
  b) implement a reset at the counting circuit at 0110

 
• a solid-state router
  a) build a circuit that will send the input to a point "A" when the selector pin is at "0", and send it to point "B" when this selector pin is at "1".
  b) send the output of a 7490 counter to a 7442 when the selector pin is at "0" and to a 7447 when the selector pin is at "1"

 
• count up to any number and back (count up OR down)
  a) build 74193 in parallel with 7490
  b) get 7442 input from 74193 or 7490
  c) run 74193 in up and down mode using your 7442 circuit to display count
  ___gif image___

___pdf version___
 
• want to build a digital clock?

 
• want to use the power line as a time-base?

4 - analog switches (diodes / transistors / operational amplifiers)
      laboratory report on learning elements

ON/OFF switches, AND / NAND / OR / NOR gates

1. use diodes to switch LED at 7442 to implement combinational switching
2. use transistors to switch high powered loads
3. (FOR LATER) operational amplifiers as switches
 

5 - op-amp analog applications
      laboratory report on learning elements

• basics of an operational amplifier.
  
  
  
  
  
  
• Exercise 5. Build an OpAmp circuit to comply with the specifications below.
  
  
  1. Power supply : +12 volts, -12 volts, GND (0 volt).
  
  
  
  2. Connections according to the circuit above.
  
  
  
  3. R(f) + R(i) = 500K. Use a 500K potentiometer to perform the role of a volume control.
  
  
  
  4. Generate a "sine wave" using a "Signal Generator" and introduce 50-millivolts between the NInv (connected to GND) and Inv.
  
  
  
  5. Connect "Channel A" of the oscilloscope to the Inv input and "Channel B" to the "output" of the OpAmp.
  
  
  
  6. Manipulate the "volume control" and watch the behavior of signals shown in channel A and channel B.
  
  
  
  
  

6 - transistor analog applications
      laboratory report on learning elements

• basics of transistors.
  
  
  
  
  
  
• Exercise 6.
  
  
  1. Construct the circuit in Figure 6-3 in "Transistor Basics" (given below).
     
     
     
  
  
  
  2. Connect the input of the speaker circuit below, through a 100 microfarad capacitor, to the output of Figure 6-3 of Transistor Basics.
     
     
     
  
  
  
  3. Connect the input of Figure 6-3 in that circuit to the output of Figure 5-2 of OpAmp Basics (also given below).
     
     
     
  
  
  
  4. CAUTION. Bring the volume control of Step 3 (Exercise 5) to its lowest setting before undertaking the next step, below.
  
  
  
  5. Follow Step 4, Step 5, and Step 6 of Exercise 5.
  
  
  

7 - allocated for specific interests
      laboratory report on learning elements

did you know you could build a digital voltmeter without using computers or microprocessors? you could use only TTL and analog devices using the so-called "successive approximation" method