Transcript The Resistor Code

Resistors
Resistors
An electrical component that
opposes the flow of electrons
-
-
?...!
-
-
-
-
-
-
-
-
-
-
-
Resistors reduce the electrical
pressure
Voltage is dropped
Current remains the same
-
-
-
-
- -
-
-
-
-
-
-
-
-
-
-
-
So there is an energy change! Then
what’s all this energy being converted
into?
-
-
-
-
HEAT
- -
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Types of Resistors
Fixed - resistor
Variable -potentiometer
Light sensitive -photoresistor
Thermal- thermistor
The Resistor Code
Decoding Resistor Values
Reading the Resistor
Start at band closest to the end of the
resistor
1st Digit
2nd Digit
# of Zeros
Tolerance Stripe
Tolerance Stripe
 The tolerance is the amount in percent that
the resistor is allowed to be off from its stated
value
+/-20% -No Stripe
+/-10% -Silver Stripe
+/-5% - Gold Stripe
What is the value of this resistor?
Tolerance Band
4
7
00
10%
= 4.7KΩ +/- 10%
What’s this thing?
`
Omega- a Greek symbol used to
represent Ohms, the unit of measure
for resistance!
Reading the Resistor
YELLOW
VIOLET
RED
SILVER




0:______________
1:______________
2:______________
3:______________
4:______________
5:______________
6:______________
7:______________
8:______________
9:______________
No Stripe:______________
Silver Stripe:____________
Gold Stripe:____________
What is the value of these
resistors?
1.___
2.___
3.___
4.___
What is the value of these
resistors?
5.
6.
7.
8.