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16 May 2011

Fileark writes:

I decided it would be easiter to explain AC and DC current if the user already knew how to use and oscilloscope. Explaining how to use an oscilloscope is easy if the user already knows what DC and AC current is. I think the video worked out as a fast paced tutorial for both subjects.

AC vs DC Explained and How to Use an Oscilloscope – [Link]

16 May 2011

A-Nony-Mus writes:

So I have seen a lot of people asking where is a good place to learn about electronics. I think it is about time that someone made an instructable about it. In this instructable I will cover some of the main electronics components, their uses and what they look like in schematics. I would like to request the members who are good with electronics to help out; if I missed a component, tell me I missed it, if I got some information wrong, tell me, please.

Electronics made easy – [Link]

15 May 2011

00retrobrad00 writes:

We continue the introductory series with MOSFETS (Metal Oxide Semiconductor Field Effect Transistor)

We will be looking at both the DE MOSFET and the ENHANCEMENT MOSFET

Introduction to MOSFETS – [Link]

12 May 2011

ermicro.com writes:

Most of microcontrollers work within 5 volt environment and the I/O port can only handle current up to 20mA; therefore if we want to attach the microcontroller’s I/O port to different voltage level circuit or to drive devices with more than 20mA; we need to use the interface circuit. One of the popular method is to use the Bipolar Junction Transistor (BJT) or we just called it transistor in this tutorial. I have to make clear on this BJT type to differentiate among the other types of transistors family such as FET (Field Effect Transistor), MOSFET (Metal Oxide Semiconductor FET), VMOS (Vertical MOSFET) and UJT (Uni-Junction Transistor).

Using Transistor as a Switch – [Link]

10 May 2011

bkraz333 writes: [via]

I describe how to design a simple transistor circuit that will allow microcontrollers or other small signal sources to control low-power actuators such as solenoid valves, motors, etc.

How to design a transistor switching circuit – [Link]

15 Apr 2011

Jon Chandler explorers the often overlooked calculations behind selecting the right resistor for an LED. This somewhat simple task is taken for granted by many, although it’s a world of mystery for others.

Got an LED and have no idea what resistor to use with it? Jon covers it step by step.

LED Calculations – [Link]

25 Mar 2011

blog.makezine.com writes:

Oscilloscopes are surprisingly easy to use once you’re familiar with a few basic controls. They’re extremely useful for testing and can provide newcomers with a whole new way to view the world of electronics & electricity – plus they look impressively cool/awesome while in use!

The Oscilloscope – [Link]

14 Mar 2011

If you need to interface a higher voltage sensor output with a lower voltage chip the simplest solution is the good old fashioned voltage divider. Here’s an online calculator to help you compute the necessary resistance values courtesy of Raltron.com. [via]

Voltage divider calculator – [Link]

10 Mar 2011

The operational amplifier is one of the most useful analog ICs available, and one of the most daunting for beginners and experienced engineers. Above is a diagram of an op-amp in a closed loop non inverting configuration. Probably the most used configuration. [via]

Operational Amplifier howtos – [Link]

22 Feb 2011

For the absolute beginner it may be hard to understand what Voltage, Current, and Resistance are.Think of voltage as water pressure, current as the size of the pipe, and resistance as a valve or restriction in the pipe.

What is Voltage Current and Resistance – [Link]





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