Hacked Gadgets Forum

September 16, 2014

DIY Bluetooth Door Lock

at 6:41 am. Filed under DIY Hacks

Bluetooth Door Lock

 

Want to make your own Bluetooth Door Lock? Just yank out the stock electronics and toss in some custom electronics along with some code (that you can modify) and you are off to the races.

 “To open the lock, we will use the app LightBlue. It has a section called the Sandbox, that lets you control the LightBlue Bean without having to program your own iOS app. When the LightBlue Bean receives a serial message, it checks the bytes received against the keycode saved inside the sketch. If the keycode matches the buttons pressed in the sandbox, the Bean Lock will unlock or lock. Get the code from GitHub.

Also, remember to add a pincode to your Bean to prevent other people from reprogramming it.”

 

Bluetooth Door Lock_2

 

Bluetooth Door Lock_3


September 15, 2014

Thermostat Remote Temperature Sensor Hack

at 8:44 pm. Filed under DIY Hacks, Electronic Hacks

 Thermostat Remote Temperature Sensor Hack_8399

 

We all have thermostats in our houses but how often are they in a horrible place? You often want to place the temperature sensor in a different location than the control and display unit. There are lots of models that have remote sensor capability but they come with a high price. If you already have a thermostat and just need the temperature sensing to be disconnected from the control unit you might be able to simply remove the sensor and mount it remote to the unit and connect it with a few wires.

That was the ideal solution to my dilemma. I recently acquired a building which has a central hot water boiler system, this means that the boiler is either firing and pumping hot water through all of the rads in the building or it’s off. There was one thermostat in a single suite to regulate the heat in the entire building. This normally works fine since most suites will have similar heating requirements as long as the radiator placement is well laid out. Big issue with this setup is that you need to provide 24 hours notice to adjust the temperature. I wanted to continue to monitor the temperature from the same location the thermostat was but I wanted the control to be in the mechanical room. I used the same thermostat wire to go from the thermostat to the temperature sensor and used a new wire from the thermostat to the boiler. The boiler control is a simple N/O (normally open) contact that closes to call for heat. So far the system is working great! I have tweaked the temperature once with no bothering of the tenants.

The model of the thermostat is a White Rodgers Model 1F178 NON_PRGM, this one is the non programmable style. As you can see from the board inside the unit and the LCD the programmable version is identical except for some magic that must happen in the factory to “make” one version programmable. I am sure the thermistor in both units will be identical so upgrading to the programmable version might be something that will happen soon. 

The future goal for the system is to mount digital temperature sensors in each suite and other various rooms such as the laundry room and mechanical room. These sensors would come back to a microcontroller based device to make heating decisions. This would allow for a nice average of suite temperatures to be used and also monitor rooms like the laundry room for freeze danger. The stretch goal would be to push some data from the system onto the internet with no internet connection on-site.

If you are interesting in having a look at some hi-res pictures from this project, you can see them here.

 

 

Thermostat Remote Temperature Sensor Hack_8391

 

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September 13, 2014

Spooky Automatic Halloween Door Knocker

at 11:44 am. Filed under Cool Gadgets, DIY Hacks

 

There aren’t much details on this Spooky Automatic Halloween Door Knocker project by WAGfilms. But just by looking and his brief description we can get enough info to build our own. I think this is a great project idea that can be used for more than just a cool Halloween prank.  He is using an Arduino Pro Mini as the brain of the system and it runs off some AA batteries. We can see that there is a PIR motion sensor that has been mounted in the forehead of the beast which will is ideal to send a signal to the arduino that someone has arrived. Some spooky LEDs are used to make the eyes glow using a nice smooth but quick ramp on. This can be done using one of the PWM pins on the microcontroller. But the best part is the automatic knocking of the door! Stick a servo motor in there and connect it to a single spare I/O of the controller and you are done. The servo will need to be quick large depending on the weight of the knocker though since it needs to move it quite vigorously! 


September 9, 2014

Arduino based RGB LED Hard Drive Clock

at 9:00 pm. Filed under DIY Hacks

Arduino based RGB LED Hard Drive Clock

 

If you are looking for a new desk clock, look no further than this Arduino based RGB LED Hard Drive Clock.

Via: Dangerous Prototypes

 

“Used material:

  1. Arduino Uno,
  2. Tiny RTC modul,
  3. ULN 2003,
  4. IR diode and IR transistor (used like a sensor, more details in next steps)
  5. 4 pushbuttons (for controling the clock)
  6. TSOP4838 (allows us to control the clock with remote controler)
  7. Temperature sensor (DS18B20)
  8. RGB led strip
  9. Connectors,
  10. Paper,
  11. And of course and old hard disk with working motor.”

 

Bus Stop Video Game powered by a Raspberry Pi

at 7:51 am. Filed under Cool Gadgets, DIY Hacks

 Bus Stop Video Game powered by a Raspberry Pi

 

If you are tired of waiting in a boring bus shack waiting for your bus I bet you wish the guys from Norwegian Creations pimped your bus shack!

“The system consists of a Raspberry Pi running RetroPie and a (somewhat modified) Makey Makey. Because the controls needs to be available for the users they need to be somewhat environmentally sealed. Therefore, by using a Makey Makey and some aluminium tape, we created a robust and waterproof “touch” panel on the outside of the booth. The WS2812B led strip is controlled by the Makey Makey, and because it’s open source and Arduino compatible it was easy to modify the source code to also control the led strip based on key strokes.”

 

 

 Bus Stop Video Game powered by a Raspberry Pi_2


September 3, 2014

3D Printed Wall Chain Clock

at 9:24 pm. Filed under Cool Gadgets, DIY Hacks

3D Printed Wall Chain Clock

 

Kaptein QK from the EEVBlog Forum shows off his 3D Printed Wall Chain Clock. The clock uses a Arduino Nano for the brains but he opted to code it in C using the AVR Studio 6, the stepper motor is being driven using an L298N dual H bridge. You can watch the clock in action below. This is a great clock for glancing at to see what the approximate time is quickly.

 

 

August 24, 2014

DIY Adjustable Electrical Load

at 10:15 pm. Filed under DIY Hacks

DIY Adjustable Electrical Load

 

 

Our friends over at Electro Labs have a  DIY Adjustable Electrical Load project posted. There are lots of adjustable load projects out there, they can come in handy when developing your next project so you should consider building one. The heart of this one is a IRF3710 MOSFET, it simply dumps the required energy into the large board mounted  heatsink.

“Since the MOSFET works as a resistive element, it dissipates heat depending on the current flowing through it. The simple equation P = VI gives us the amount of heat which will be generated on the MOSFET. To extend the power range of the load, we need to attach a heatsink to the MOSFET case.”

 

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