Turn-key PCB assembly services in prototype quantities or low-volume to mid-volume production runs

Arduino Mandelbrot Fractal viewer

The Mandelbrot Set is a kind of equipment that was set up by Jonathan Coulton Adam Wolf. It is a fractal whereby it allows you to zoom on the border and you get the very best image. Almost everyone knows what Mandelbrot Set is but do not know how this is calculated. What most people know is that it has some special properties that related to zooming. To understand what Mandelbrot Set is, you need to read the tutorial that has been written by the developer himself whereby you will find out that there are both the mathematical and practical approach. The Mandelbrot set and other similar fractals are drawn in such a way that there are a lot of good looking colors that are around a black background like the one shown below. Continue reading

Twittering Laser Based Tripwire with Webcam Capture

Making a Twittering laser tripwire with webcam capture is quite easy. If you want to know how to make a laser trip wire that is capable of twittering and capturing an image from a webcam, you can use an instructable from instructables.com. This instructable will also show you how to create a laser tripwire that can execute any bash script command that you want it to any time you want it to. You do not have to be a pro to understand and use this instructable. Beginners will find it easy to use the instructable to create Twittering Laser Tripwire with Webcam Capture. For you to create this kind of tripwire, you will need a GNU/Linux or Mac operating system that supports that has a Processing IDE and Arduino IDE that is fully functional. Windows OS that has a more complex processing application can also be used for the purpose of creating a Twittering Laser Tripwire with Webcam Capture. The hardware that you would require include an arduino board, a Laser pen or pointer, a resistor that is light dependent… Continue reading

Turn photo frame in to word clock

This is really easy to build project which uses couple external components, Arduino and an old photo frame. All you need is to store 720 pictures with actual time words – for each minute in 12- hour cycle and then let the circuit to hit next button every minute. First of all in order to hit next button you don’t have to build some kind of mechanical actuator – simple optocoupler will work fine. And probably the hardest thing is to think of generating 720 images with different words on it. No problem with that – a processing script can do this for you – just select right parameters and run script. After images are generated – upload to photo frame memory and start a clock. Someone wants to change frames every second – that’s only a 43200 frames to generate 🙂 Continue reading

Arduino controlled sand timer

Sand timers are still common in many areas. They are like time counting symbols and can be recognized of its special shape with sand tanks and thin tunnel allowing sand flow from top to bottom. The only downsize of such timers is that amount of sand is limited and you always have to turn it over after sand leaks out. < p style=”text-align: center;”> USB Hourglass from alwynallan on Vimeo. Why to do it yourself – leave this task for Arduino like in this project. It uses an Arduino board that controls whole process, a stepper motor which rotates sand timer when needed and an optical sensor which determines when its time to rotate. But this isn’t it. This so called USB hourglass also uses optical sensors light beam as random number generator. Because falling sand produces some kind of chaos, so the light beam intensity produces some entropy that is sent to PC via USB. This way 10 bit ADC generates random numbers at 100 Hz frequency. Well this is really nice and handy desktop toy. I can imagine… Continue reading

Get your beer cold with this fridge controller

So your fully stuffed with beer fridge thermostat broke and you have a nerdy look why not to fully computerize the process by your own. Arduino fits right well for this as you can easily control a compressor, log the temperature and even see what’s going on via web interface by using Arduino Ethernet Shield. So why waste a spare Arduino with Ethernet only for fridge controller? So Author plans on putting a bunch of additional temperature sensors around the house and monitor them conveniently in web interface. Possibilities are almost endless and all started with a broken fridge. Thumbs up guys! Continue reading

Measure your battery true power

If you have several gadgets of electronics projects laying around, your probably have a set of various rechargeable batteries including Li-Ion, NiMH, NiCD and of course Pb. And probably you have noticed that there are so many brands and various capacity around in the market – especially Chinese versions that can be doubtfully trusted. One way to clear things out is to sacrifice one charge and test them. One and reliable way to measure battery capacity is to discharge fully charged battery with known current. If connecting discharge circuit to Arduino – you can get full lab of testing batteries. This way by sending log data to PC you can get a nice charts of discharging current and full capacity. Without going too deep you probably know that different batteries can drain different sources during various discharge phases. Lets say at the end of discharge you may notice that electrical current may be too low for your project and maybe your should choose different one. And of course you can always write true battery A/h with marker and guess no… Continue reading