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#How do you know which is right and left on a resistor code

Discrete resistors in solid-state electronic systems are typically rated as 1/10, 1/8, or 1/4 watt. Resistors are rated according to their maximum power dissipation. What is the wattage rating of a resistor? In other words… R is the resistance, measured in Ohms (Ω). To calculate the resistor needed for a simple LED circuit, simply take the voltage drop away from the source voltage then apply Ohm’s Law. Count the number of colored bands on the resistor so you can calculate the specific resistance value, or the number of ohms. There are 3 types of band resistors: 4-band resistors, 5-band resistors, and 6-band resistors. 1/8 Watt Resistor – 1.8 x 3 x 28: It handles 13.88 mA when connected to 9 V source 1/4 Watt Resistor – 2.5 x 6.5 x 28: It handles 27.77 mA when connected to 9 V source 1/2 Watt Resistor – 3.2 x 8.5 x 28: It handles 55.55 mA when connected to 9 V source How do you find the number of bands on a resistor?Ĭount the number of colored bands to help find the total value. No resistor is needed for this LED, as you have shown by testing it with 12V. The circuit on the left behaves as you are describing, it is my best guess as to what is going on. On the left, Battery is switched between Acc and Ground. On the right, Acc is switched between Battery and Ground. Swap the red and black wires at the switch. How do I work out what size resistor I Need?

#How do you know which is right and left on a resistor code

This code contains the width and height of the package. The size of SMD resistors is indicated by a numerical code, such as 0603. The shape and size of surface mount resistors are standardized, most manufacturers use the JEDEC standards. What are the dimensions of surface mount resistors?

Yellow: 4 significant digit, multiplier of 10,000 (10 kilo)ĭeepak Enterprise 10k OHM 1/4w 5% carbon film resistor – Set of 100 Resistance M.R.P.:.

Orange: 3 significant digit, multiplier of 1,000 (kilo).

Red: 2 significant digit, multiplier of 100.

Brown: 1 significant digit, multiplier of 10.

Black: 0 significant digit, multiplier of 1.

The cases where using a higher value resistor will damage a circuit exist, but are a bit less usual than the cases where it may simply produce a weaker result than desired, or a different frequency response than desired. What happens if you use a bigger resistor? Usually, you can just use the cheapest resistor you can find with the correct power rating. Here I would choose a 250 mW resistor since those are the most standard ones.

How do you know what size resistor to use?Ī rule of thumb is to find a resistor with twice the power rating. What is the wattage rating of a resistor?.How do you find the number of bands on a resistor?.How do I work out what size resistor I Need?.

What are the dimensions of surface mount resistors?.

What happens if you use a bigger resistor?.

How do you know what size resistor to use?.