Category Archives: Videos About Electronics

Interesting videos about electronics, emedded systems and robotics.

SMD soldering tutorial

SMD has entered hobby market long time ago, but there are still many people who afraid to push their projects to SMT level. Once you try it appears to be very easy – even easier than through hole PCB technology. Dave from eevblog have published series of PCB soldering tutorials where he goes through tools needed to make quality soldering, then through hole soldering tips and finally SMD component soldering.

In this video Dave carefully explains what main techniques (individual pin soldering, well based and drag) can be used to successfully solder SMD parts and what odds are awaiting for inexperienced players. If you don’t want to solder with iron, then you’ll see how it is easy to do this with solder paste and hot air gun.

So, take your time and see how it’s easy.

Do you know all features of your scope?

Probably you found yourself in situation when you couldn’t get clear view of more complex signal on your scope. For instance it is pretty hard to synchronize packet data waveform. All you get is a mess on your scope screen. With analog scope it is almost impossible to get it while on Digital Storage Oscilloscope (DSO) you can store trace in memory and then analyze it. But this isn’t very handy. So there is a nice feature on most scopes which is called Trigger Holdoff. Check out this video tutorial from eevblog where Dave shares his thoughts about how this feature can be used in real life situations.

 

Detailed guide on how to design DC to DC power supply

Every time when you deal with electronics projects one of the headaches is designing power supply. Depending on your needs you may need to step up voltage let’s say from 5V to 15V, step down or even to convert it to negative voltage. David L. Jones from eevblog has prepared great video post where he takes us through all steps needed to design step-up DC to DC converter.

He chooses well known and widely available converter chip MC34063 which can be used almost for any type DC to DC converter including step-down, step-up and inverting supply. All required formulas you will find on datasheet – all you need is to select output current and output voltage.  All needed component values can be easily calculated by using readymade formulas or online calculator. Additionally David made a real design test with load efficiency charts. After this you will find that designing switching power supplies isn’t so hard. [EEVblog#110]

DIY PCB boards quickly and efficiently

There are lots of tutorials on how to make great PCB. So here is another video tutorial from [getlofi.com]. You can build PCB by using mostly common tools and materials from your work desk.

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You do not need circular gears for circular motion

Things seems to be different until they are put in action. Simply enjoy this video.

Peggy 2.0 led display board

Guys from Evil Mad Scientist Laboratories have released 2nd version of their Peggy LED display kit. It is a 25×25 LED display board which is capable to display various LED effects, output text and even animation with individual LED addressing.

This is quite smart construction allowing to drive any number of LEDs (from one to 625). Peggy board has several buttons that can be used to control various actions like games or other effects.  The board itself is nicely designed so it wouldn’t be a shame to use it as a dynamic LED sign, FFT sound grapher,  RSS reader or simply as general purpose giant display. You can order peggy board as a kit or try to build it by yourself as all project files are available for building, hacking or simply analyzing.  [Peggy v2.0]

Surface Mount Soldering with inexpensive equipment

This is really great video about SMD soldering using simple and cheap equipment that most electronics hobbyist can find at home. This 9 min video tutorial prepared by CuriousInventor includes up-close shots of fine pitch soldering such SMD elements as 603 resistor, PLCC< 44 pin QFP, 208 pin fine-pitch QFP. Also there are few SMD desoldering tips disclosed.

Glowing LED tubes and signs for parties

Have you missed a New Year party? Dont worry you can make it UP with these fun projects made of LEDs andother cheap materials. Joe Utson has compiled several LED and fiber optic projects the average Joe can create easily and get ready for the party. One of them is simple LED sign made of large perforated PCB board and 50 LEDs. You can form any sign or text that works great for parties:

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Increase wireless signal strength in few minutes

Florin from YouriTronics have taken a video where he shows how to make very simple WiFi signal reflector and this way increase the signal level to one direction. For this he used soda can cut in half. Probably everybody know parabolic antennas and ho do they reflect signal from focal point. If WiFi antenna is placed along can shape focal point, the signal waves will be directed to one direction. Of course soda can isn’t parabolic shape, but this cheap solution gives noticeable results.

[link]

Desoldering Atmega128 using a lighter

I heard about this method an decided to try with may board. I needed to replace Atmega128 chip, but didn’t have hot air solder for desoldering IC. I tried this weird desoldering technique and I can say, that I satisfied. Tracks and other parts were saved.

Watch a video:

Now my Atmega128 board is working again.

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