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Basic Electronics » OBDII project
February 16, 2010 by Mike |
The tutorial on the project calls for a 5k resistor. Is that a 1/4 watt? Or is it higher wattage? You can see the others are low wattage. |
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February 16, 2010 by BobaMosfet |
You can calculate the wattage you need. Use Watt's Law. Then choose the appropriately rated resistor.
For example, let's say you are using a 5KOhm resistor with 5Volts DC. Ohm's law says the current is:
So, the appropriate Watt rating for the resistor has to be:
A 1/8th Watt Resistor would be more than adequate. BM |
February 17, 2010 by Mike |
Thanks BobaMosfet. Excellent tutorial. I ordered the display and the chip yesterday, so I want to nail this down as best I can. |
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