Make Christmas Lights (part 1)

It’s Christmas time! Yeah! … Are you bored? Me too. Hearing the same Christmas songs every year all over again. Boring love movies on all channels and they aren’t even half good as they were before. So let’s make it more interesting. One thing I like about Christmas is that it lifts the spirits (when you are not bored to death by stupid music and bad movies). Another thing is the christmas lights everywhere. They blink, they glow, they do all kinds of weird and wonderful things. And it can become an obsession. The more you get involved into building the lights, the more pleasing it is to watch them. How about making a simple Christmas lights controller?

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Posted in Make

Making a Bench Shelf

When I started with electronics I worked on an old plastic table which was quite unstable. I saw a kitchen table for half the price – brand new. They dropped the price because one of the legs had few scratches.
It has nice 5cm massive legs from thick sheet steel. It’s 100x80cm and it’s extendable to 130 cm length. It’s quite stable and cost me about 40EUR. Although it’s big I quickly run out of space – I got few more multimeters, a new oscilloscope and I planned to build/buy power supply, function generator and other stuff. So I decided to make a shelf.
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Posted in Other

Rigol DS2072A first impression

I just received the Rigol DS2072A (the new version of the DS2000 series) oscilloscope and I though I can share my first impressions. It’s not a complete review because the good and bad sides I’ll mention are not actually tested in details to see how they interfere with the work process. I’ll probably post more detailed review after I spend more time working with the scope.

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Delays in microcontrollers

Everyone says that it’s bad to use loops for delays in microcontrollers.  But why? It’s a lot easier to make it that way. In most cases there are macros available that’ll do the calculations for you and will make the correct loop to delay the precise time. Why would they do these macros if it’s bad to use them. Well it really depends on what you are doing. It’s not always bad. In this article I’ll show you the benefits of using interrupts and why/when it’s good to use them and when you should not to use them.

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Operational Amplifiers (op amps)

Well, internet is full of op amp tutorials. Wasting time for writing yet another tutorial which will say nothing new is not efficient. What I’ll do is to search for good tutorials and list them. I’ll also read/watch them and if I have something to add – I’ll write it. Also if you have troubles understanding something – drop me a line and I’ll try to explain it.

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Voltage, current, resistance, Ohm’s law.

You have never studied electronics it’s probably a good idea to learn about basic quantities voltage, current and resistace before you continue with electronics. If you know about it it’s still good to read this in order to confirm you don’t have bad knowledge about something. It’ll probably be boring because it’s mostly theory, but I’ll try to spice it a bit.
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First Steps with μControllers Part 3

(running the first program)

When you write programs for devices it’s a lot worse when something goes wrong. For example if you output the wrong signal, depending on your schematic you might be making a short circuit. Or if you are trying to run a LED with PWM you might make it run constantly  and the current could be too much. That’s why it’s better to run the program in simulator before running it on the MCU.

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First Steps with μControllers Part 2

(writing the first program)

If you are tired of talking and want some action – let’s not waste anymore time. In this part you will learn how to set up a project using MPLab, write a simple program and run it on your microcontorller.
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First Steps with μControllers Part 1

… or starting from scratch.

You heard about microcontrollers, but you don’t know where to start. Well start here – read this article/tutorial and you will never look at microcontrollers in the same way again.

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How to not die from Chinese charger adapter

DSC-01005a I found an old GSM charger and I wondered if I can use it for something. On the label it sais 4.8 to 8.5V. What a precision! And if you wonder – it’s not within spec – the output is 9.5V.

 

Well let’s open it and see what’s inside.

 

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Posted in Teardown

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