Ohm's Law: Difference between revisions
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[http://en.wikipedia.org/wiki/Ohm's_law Ohm's Law] | [http://en.wikipedia.org/wiki/Ohm's_law Ohm's Law] | ||
==Ohm's Law Diagram== | ==Ohm's Law Diagram== | ||
The following diagram shows the relationship between the various electrical properties.<br/> | |||
[[File:Ohms-law.jpg|300px]]<br/> | [[File:Ohms-law.jpg|300px]]<br/> | ||
==Voltage V== | ==Voltage '''V'''== | ||
Voltage is measured in [http://en.wikipedia.org/wiki/Volt volts]. (V)<br/> | Voltage is measured in [http://en.wikipedia.org/wiki/Volt volts]. (V)<br/> | ||
==Current I== | ==Current '''I'''== | ||
Current is measures in [http://en.wikipedia.org/wiki/Ampere amps] (A).<br/> | Current is measures in [http://en.wikipedia.org/wiki/Ampere amps] (A). Current is often measured in many electronic circuits is measured in milliamps (ma). A milliamp is one thousandth of an amp (0.01A).<br/> | ||
==Resistance R== | ==Resistance '''R'''== | ||
Resistance is measured in [http://en.wikipedia.org/wiki/Ohm ohms] (Ω).<br/> | Resistance is measured in [http://en.wikipedia.org/wiki/Ohm ohms] (Ω).<br/> | ||
==Power '''P'''== | ==Power '''P'''== | ||
Power is measures in [http://en.wikipedia.org/wiki/Watt watts] (W).<br/> | Power is measures in [http://en.wikipedia.org/wiki/Watt watts] (W).<br/> | ||
==LED Calculator== | |||
Use these calculators to calculate the resistor needed to include in a circuit with a LED.<br/> | |||
===Single LED=== | |||
[http://led.linear1.org/1led.wiz LED Calculator] for 1 LED.<br/> | |||
===Array of LEDs=== | |||
[http://led.linear1.org/led.wiz LED Calculator] for an array of LEDs.<br/> | |||
==Pixel Voltage Drop Calculator== | |||
[http://doityourselfchristmas.com/forums/showthread.php?20242-New-tools-for-estimating-pixels-string-voltage-drops Thread]<br/> | |||
[http://blinkyflashy.info/calcs/pixpower.php Calculator] | |||
Revision as of 03:58, 28 October 2012
Ohm's Law
Ohm's Law Diagram
The following diagram shows the relationship between the various electrical properties.
Voltage V
Voltage is measured in volts. (V)
Current I
Current is measures in amps (A). Current is often measured in many electronic circuits is measured in milliamps (ma). A milliamp is one thousandth of an amp (0.01A).
Resistance R
Resistance is measured in ohms (Ω).
Power P
Power is measures in watts (W).
LED Calculator
Use these calculators to calculate the resistor needed to include in a circuit with a LED.
Single LED
LED Calculator for 1 LED.
Array of LEDs
LED Calculator for an array of LEDs.