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{{Introduction to Robotics/Nav|Electrical Components}}
== Reading ==


== Part 1 ==
*Read [[wikibooks:Circuit Theory/Resistors|Circuit Theory: Resistors]]
*Read [[Wikibooks:PBASIC Programming/Input and Output|PBASIC Programming: Input and Output]]


A computer serial port cable has a few requirements: the signal is 5 volts, and the total current flowing into the port can be up to 2 milliamps. If the current is too high, the circuit will be ruined. How much resistance must a serial cable have at 5 volts to keep the current below 2 milliamps?
== Questions ==


== Part 2 ==
=== Ohm's Law ===
 
#A computer serial port cable has a few requirements: the signal is 5 volts, and the total current flowing into the port can be up to 2 milliamps. If the current is too high, the circuit will be ruined. How much resistance must a serial cable have at 5 volts to keep the current below 2 milliamps?
#If we have a circuit with a set resistance ''R'', we want to change the voltage and measure the current. Which of the following shapes is our graph likely to have:
##Parabola
##Hyperbola
##Line
##Sine Wave
 
=== Resistors ===


You have the following resistor color codes, what resistance do these correspond to?
You have the following resistor color codes, what resistance do these correspond to?
{|
|-
|
:1.
|{{Introduction to Robotics/Resistor|brown|black|brown}}
|-
|
:2.
|{{Introduction to Robotics/Resistor|orange|orange|red}}
|-
|
:3.
|{{Introduction to Robotics/Resistor|brown|black|yellow}}
|-
|
:4.
|{{Introduction to Robotics/Resistor|green|green|blue}}
|}
=== Ports ===


#{{Introduction to Robotics/Resistor|brown|black|brown}}
#We have a sensor that outputs values between 0 and 116. How many parallel input ports do we need?
#{{Introduction to Robotics/Resistor|orange|orange|red}}
#If we have the statement "DIRS = %1100110101001110", what ports are inputs, and what ports are outputs?
#{{Introduction to Robotics/Resistor|brown|black|yellow}}

Latest revision as of 17:20, 8 November 2009

Reading

Questions

Ohm's Law

  1. A computer serial port cable has a few requirements: the signal is 5 volts, and the total current flowing into the port can be up to 2 milliamps. If the current is too high, the circuit will be ruined. How much resistance must a serial cable have at 5 volts to keep the current below 2 milliamps?
  2. If we have a circuit with a set resistance R, we want to change the voltage and measure the current. Which of the following shapes is our graph likely to have:
    1. Parabola
    2. Hyperbola
    3. Line
    4. Sine Wave

Resistors

You have the following resistor color codes, what resistance do these correspond to?

1.
       
brown black brown gold
2.
       
orange orange red gold
3.
       
brown black yellow gold
4.
       
green green blue gold

Ports

  1. We have a sensor that outputs values between 0 and 116. How many parallel input ports do we need?
  2. If we have the statement "DIRS = %1100110101001110", what ports are inputs, and what ports are outputs?
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