Make your own Heart Keychain

Heart Keychain PreviewThis one is a very simple but cool project, something that I would recommend to anyone who is interested into DIY electronics, gadgets and learning new stuff in general. It is definitely one of those projects that don’t require too much time but you can learn a lot by making it and also earn a lot of credit by sharing it with your friends and family.

Below you can see a final product. It’s a heart shaped, touch sensitive, keychain for your loved ones. On the front side there is a smiley face drawing that has eyes and mouth. Eyes have two red LEDs that will start to pulse once you touch the keychain or place you finger on the smiley face (see it in action below) Continue reading “Make your own Heart Keychain”

DIY Wake-up Light – Wake-up easily and well rested

DIY wake-up light hack

Theory behind this project

Another weekend project that I’ve been working on is Wake-up light. Lately I’ve been doing more research on sleep phases and how to “hack” your brain to wake-up more refreshed and adjust your sleep cycle. There are many studies out there explaining this and providing scientific evidence, so if this is something you are interested in, I encourage you to go and get more detailed information on this subject. However I won’t go into too much detail, I’ll just try to give very simple explanation: When you sleep, you are either in REM or deep sleep (NREM) phase. When you wake up in REM phase you feel fresh, relaxed and full of energy. When you are woken up during the deep sleep phase, you feel like you’ve just been hit by a bus, and you take long time to actually wake up. Continue reading “DIY Wake-up Light – Wake-up easily and well rested”

USB Power supply Active Load Tester

USB Power supply Active Load Tester or short PAL Tester is unit designed for testing the quality of the power supplies.
Idea was to create low-cost, precise device for simultaneous measurement of Voltage and Current drawn from the device under test. This is one of my weekend projects that I have decided to release to the public. All source files can be found on projects GitHub page.

Device Features:

  • Open Source and Open Hardware
  • Modular design, easy to understand and change/adapt to your needs
  • Uses widely available and off-the shelf components
  • Components Bill of Material is below $10
  • Integrated USB-to-Serial converter for easier interface with the device
  • API for communicating with PC
  • Recording Voltage vs Amps data and graphing the results
  • Easy to use

Continue reading “USB Power supply Active Load Tester”

Power Supply Active Load Tester – Open Source Open Hardware project

I’m working on a new weekend project that will be released as soon as I finish the Windows application and it will be released as open-source open-hardware project. The uber-cryptic title stands for “Power-supply Active Load tester”.
Recently I was in need for a simple device that will draw reasonably precise amount of current from my power supply unit under test and read the voltage and current draw. There are a lot of schematics and products that do just that, or you can do this just with two digital multimeters, op-amp, mosfet and potentiometer and that will probably work just fine, but I wanted to create my own version and try to improve it. 🙂 Continue reading “Power Supply Active Load Tester – Open Source Open Hardware project”

Mini project: Heartbeat Keychain

Heartbeat keychain is intended to be a small gift that your loved one can carry with her/him wherever she/he goes.
Basically top side of the PCB is touch sensitive and has one RGB LED. When the exposed copper on the top side is touched, the microcontroller detects it and begins to pulse the LED in the heartbeat like pattern.

Bill of material, schematics and source code are available on GitHub.

I am posting render images of the PCB since I’m waiting for the Fab house to manufacture the boards for me.

Board size is 40mm x 36mm

Project MonkeyPHP

MonkeyPHP – I’m trying to develop a website where people could find useful tutorials and applications that could inspire or help them. Anyone who is willing to make new applications (PHP MYSQL AJAX) is welcome. If you need more information or want to join, use the contact form.
Update: Project closed. Source code and projects uploaded to other open-source communities

CCMS – Clean CMS

For the past week or two I’ve been developing my very own CMS. It’s based on PHP, SQL and AJAX. Currently it’s in the closed beta phase of development but soon as I finish some things and squash some bugs I hope I’ll post it here so you can use it and support it. This CMS in the first realize will not have any design, so you can apply your theme to the CMS and since the PHP and Design are divided by the template engine it will not be a problem to customize it. I’m really tired now, It’s 04:15 AM and I’m really tired and probably mistyping like hell but what a hell. 🙂

As soon I get some free time I’ll post some demos, specifications etc.

And yes I’ve almost forgot, from now on the www.sasakaranovic.com is running on Clean CMS and it took me about 30min to apply the old design to the new Clean CMS and about 5min to setup the CMS. 🙂