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Showing posts from October 9, 2016

How To Calculate And Understand Resistor Values

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Resistor Color Code Bands
& Other Component Identification Resistor Color Code Identification While these codes are most often associated with resistors, then can also apply to capacitors and other components. The standard color coding method for resistors uses a different color to represent each number 0 to 9: black, brown, red, orange, yellow, green, blue, purple, gray, white. On a 4 band resistor, the first two bands represent the significant digits. On a 5 and 6 band, the first three bands are the significant digits. The next band represents the multiplier or "decade". As in the above 4 band example, the first two bands are red and purple, representing 2 and 7. The third band is orange, representing 3 meaning 103 or 1000. This gives a value of 27 * 1000, or 27000 Ohms. The gold and silver decade bands divide by a power of 10, allowing for values below 10 Ohms. The 5 and 6 band resistors work exactly the same as the 4 band resistor. They just add one more significant …

Use Transistor As Motor Driver : Basic

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Hello everyone, In this post we will be using transistor as a Motor Driver. Actually, We can't say it as a Motor Driver as it can just toggle motor ON or OFF rather than controlling the motor speed or direction. But, Using the transistor protects our Arduino from burning out. As ordinary DC motors runs on High Amps or consume more current than what an Arduino can supply. Step 1: Gather the parts An ArduinoA breadboardA 220ohm resistorA 2N2222 transistorA DC motorA 9V batterySome jumper or hookup wires Step 2: Wiring

How To Use A Piezo To Produce Tone : Basics

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Hello everyone, In this post, We will be using a Piezo buzzer to produce tone. What is a Piezo buzzer? A Piezo is a electronic device that can be used both to produce as well as detect sound. Applications: You can use the same circuit to play a musical note by switching the Piezo on and off several times.The experience can be further improved by changing the loudness of the Buzzer using Arduino PWM pins. We will be starting from basics and will produce a simple Beeping tone using Piezo. Step 1: Gather the parts For this project we will need: An Arduino UNOA 5V Piezo BuzzerJumper wiresDon't we need a resistor to limit the current through the buzzer? No, if you are using a small 5V Piezo. As it derives or uses very small amount of current so can be used without a resistor in series. Step 2: Wiring