Here you will learn about common resistors tips and how to find good information.
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A basic instruction for electronics enthusiasts. I use an RGB LED and a 510 ohm resistor as I may change from 6 to 9 volts later, but with my LEDs i could go as low as 330 ohms. I sacrifice some brightness for the sake of longer life. To choose your resistor, the value in ohms = voltage of your batteries or power supply / (as in divided by) the amperage that your LED needs to run
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Using a Multimeter to test Ohms (resistance) using aa resistor as an example. Thanks for watching and please subscribe!
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A lie detector is an instrument uses to detect blood pressure, respiration and pulse. This instrument usually uses as a forensic instrument. It is commonly used in police station for investigation but this simple instrument can be use in your house.
This article tries to give you information to make a simple lie detector. Lie detector is also known as a polygraph. This simple detector can be extremely helpful if you want someone to tell you the truth. This simple instrument may be not as high-tech as the expert use but it could help you. This instrument operates by assessing the resistance of the skin that will down when you lie. Your skin will go down when you lie because lying will make you feel uncomfortable and nervous. This reaction will make your skin go down.
The first thing to do before making the detector is preparing all the details. Here is the list:
1. MISC 1 Case, Wire, Electrodes (you can use electrodes with alligator clip but you can also uses wire or strap like in hospital), the simple one is wires and tape.
2. 4.5V batteries (2)
3. electrolytic Capacitor C1 1uF 16V
4. R3 1 1.5K 1/4 W Resistor
5. Q1 1 2N3565 NPN Transistor
6. Analog meter M1 1 0-1 mA
7. R2 1 5K Pot
8. R1 33K 1/4W Resistor
These components can be easily found in electrical shops. You can read on the components part to make sure that you have bought the right things. Then you can put and attach each component with the wire. Connect the batteries separately using wires. Put the analog meter between the batteries, so there will be battery wires battery using the wires between the batteries you put the R3 and analog meter. Then, the R1 and R2 after the analog meter is put there. Q1 is near the electrodes.
You need to adjust the analog meter to 0. Attach the wire using tape to the back of the subject’s hand. If the analog meter changes from 0 it means that the subject is lying to you.
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www.theelectronicsbook.com Resistor is a component that resist to current flow though it. The resistor obey to ohm’s law, this is the reason that the resistor is using for tuning currents in the electronic circuit. The resistor is one of the most common components in the circuit. The resistance of each resistor is calculated and defined by the circuit designer according to the required currents and voltages in the circuit. Each resistor is manufactured with a specific resistance. Manufacturers have a large range of resistors on almost every resistance value according to some important rules. Theoretical calculation in the electronic circuit can defines the resistance of the resistor. Let’s say that the resistor that we calculated is 10.2378Ω. The resistor component has a specific resistance but it is impossible for the manufacturer to generate every required resistance. The manufacturer has a table with available values of resistors that the customer can buy. You should buy the closest resistor value to your calculations. The manufacture process of resistor (and every electronic component) is a complex process that can not generate an exact value. This is the reason that the manufacturer defines the accuracy of the resistor. Example the manufacturer sells a resistor of 10KΩ with accuracy of 10%. The manufacturer is committed to a resistance value between 9KΩ-11KΩ. The circuit designer must take this range in account when using this resistor. If you want a better accurate …
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KOA Speer 6.19K ohm Surface Mount Thin Film Precision Resistor 0603 0.1% 1/16W 25ppm RN731J 100% TIN RoHS (Continuous strip of 100)
*** Product Information and Prices Stored: Apr 27, 2011 01:06:26
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