In this video I’ll tell you what is darlington transistors, how to use them to switch medium current loads with microcontroller and what downsides they have.
Also you’ll find out about darlington arrays. Of course there would be small demonstration of controlling different loads at the end of this video.
Interfacing Microcontroller: Darlington Transistors - [Link]
dangerousprototypes.com writes: [via]
If you’re at that stage as a beginner where you wonder what’s going on behind the scenes on an Arduino board you should check out jumperone’s tutorial on using microcontrollers. There you’ll learn what’s needed to take a bare microcontroller and load your own program onto it. Both PIC and Atmel chips are covered, with an explanation of what simple components you need to get started in addition to the chip itself, along with programming connections and hardware.
Microcontrollers for newbies - [Link]
Normally one tact switch requires one digital input pin of a microcontroller. Some designs implement keypad style multiplexing to get multiple switches on fewer inputs. However, there exist other techniques that allow you to connect many switches on a single input pin of a microcontroller. This tutorial demonstrates one such technique as applied to PIC12F683 microcontroller. In this example, there are four LEDs and four tact switches connected to the PIC12F683 microcontroller. While each LED is controlled through an individual I/O pin, the four switches are connected to one ADC input pin of the PIC12F683 microcontroller.
Connecting multiple tact switches on a single input pin of a microcontroller - [Link]
HD44780 based LCD displays are very popular for embedded projects because they are cheap, easy to interface, can display characters, consume power lot less than seven-segment displays, and most of the present day compilers have in-built library routines for them. However, the only disadvantage is that they require at least 6 I/O pins of microcontroller. Well, you may ask, isn’t that less than what seven-segment displays require? Yes, that’s true but there are circumstances where you don’t have left enough pins for LCD display.
Why pay for Serial LCDs when you can make your own? - [Link]
Embedded-Lab’s new tutorial is about how to play notes of a song with a PIC microcontroller. Musical notes are simply sound waves of particular frequencies. If the frequency of a note is known correctly, a microcontroller can be programmed to play the note by generating a square wave (of the same frequency) signal at one of its I/O pins, which if fed to a speaker, can produce the audio tone.
Playing musical notes with a PIC microcontroller – [Link]
If you happen to work with microcontrollers or other digital ICs, then you have certainly face a situation where you need urgently 8 LEDs with 8 resistors for a test or other debugging purposes. And it is this time where things get nasty: You are in a hurry because you want to see the results, connecting the LEDs is totally boring, you need also 8 resistors, not to mention the wires, and then, the LEDs themselves are thick and usually won’t fit in 8 breadboard rows… You know what i mean.
Tiny LED Debugging Board for Breadboard Prototyping - [Link]
Parallax’s Basic Stamp is the mainstay for hobbyists wanting to add intelligence to everyday devices. A new system called Arduino provides the benefits of the Basic Stamp at a greatly reduced cost, increased speed, and is entirely open-source.
Tiny computers surround your life. In your coffee maker, remote control, vacuum cleaner, telephone, and clock radio, these little computers (aka microcontrollers) are getting smarter and cheaper and becoming more pervasive every day. They can be had for less than a dollar. And you can program them as easy as you can write a web page.
Arduino, the Basic Stamp killer - [Link]
This morning I decided its about time I learn how to use the UART hardware in most PIC microcontrollers. I started off with a USB-RS-232 converter that I got for US$3 from DealExtreme. There are a few reasons why I used a converter, firstly being because my main PC no longer has an RS-232 port since its old tech, but also because I thought it’d be alot neater for my projects to have a USB connection and it means I can interface with TTL signal levels (0-5v) instead of the RS-232 standards -12v – +12v which would have added complications, but we’ll get back to that just now…
Learning Serial Communication - [Link]
MikroElektronika has just released EasyPIC v7, a latest edition to its successful EasyPIC series development boards for PIC microcontrollers. [via]
This is a very special day for us. We are excited and honored to present you with the new version of our famous brand – EasyPIC v7 is here!
We’ve asked ourselves what can we do to improve such an amazing board as EasyPIC6, and even if it seemed like a tough assignment, we have done some outstanding interventions in design and functionality, and made a new board no one can stay indifferent to.
For the first time in EasyPIC’s almost 10-year history, we’ve grouped PORT headers, LEDs and Buttons in an Input-Output groups, thus making them easier to use than ever before. We’ve equipped the boards with tri-state DIP switches, so placing pull-up or pull-down jumpers to desired pins is now just a matter of pushing the switch.
MikroElektronika releases EasyPIC v7 - [Link]