Hacked Gadgets Forum

July 10, 2014

Android Thermostat

at 12:32 pm. Filed under DIY Hacks, Electronic Hacks

 Android_thermostat

 

Yesterday we looked at an entry level DIY thermostat project. If you want to go all in with processing power and features have a look at the Open Source Android Thermostat Project. It is based around the IOIO-OTG and uses the TMP36 temperature sensor. A small custom PCB is used to hold the handful of components that make the control side of things work and you simply connect up your Android device for an instant great looking screen with touch interface.

 “Android Thermostat is an open source thermostat project ideal for programmers and electronics hobbyists. As the name suggests the application runs on Android phone that is connected to some basic electronic components for controlling your home HVAC system.It costs around $140 to build and can be assembled in an afternoon.

It has several advantages over a traditional thermostat including the ability to easily create multiple schedules that are as simple or complex as you like, remote control access, monitoring of usage and easy updates over the internet. It’s API and open source nature means you can further customize the thermostat to perform additional functions. “

 

 

Android_thermostat_2


July 9, 2014

Arduino Thermostat Project

at 5:33 pm. Filed under DIY Hacks, Electronic Hacks

Arduino Thermostat Project

 

If your thermostat just stopped working you could go to the store and purchase a new one but why not make your own. You can add any feature you like, want to control it from your smart phone? Add an ethernet module and go for it. Want to add schedules? Add a RTC and you can program timed temperature settings to your hearts content. Want to make sure the average temperature in your house is kept to a certain temperature? Add multiple sensors in various areas and average them together or add some dampers to control the air flow in various zones. Your imagination if the only limitation.

This Arduino Thermostat Project by Dylon124 is just the basics but from this starting place anything can be done.


July 1, 2014

Bauxite – Add Automatic Skating Sound Effects

at 10:47 pm. Filed under Cool Gadgets, DIY Hacks, Electronic Hacks

bauxitenew

 

If you like skating have a look at this cool Automatic Skating Sound Effects project called Bauxite over at Skate Hack
Via: Make

“Bauxite is an open source portable skateboard box embedded with piezoelectric sensors, customized hardware and software and portable loudspeakers. As the skateboarders ride on the box, the piezoelectric sensors convert physical vibrations into triggers and generate a selection of pre-recorded sound-samples amplified through loudspeakers. Skateboarders interact with Bauxite through tricks and movements transforming an ordinary skateboard box into a skateboard-powered music sampler!”

 


June 19, 2014

Arduino tracks Near Space Launch

at 11:18 pm. Filed under Complex Hacks, DIY Hacks, Electronic Hacks

 Arduino tracks Near Space Launch_3

 

  send this box of electronics 124,000 feet in the air. The view sure looks great from that height! To track the balloon he used the Space Near Us tracking system, a custom PCB was created to keep the circuit as robust and compact as possible. 

“Radio – in the UK there are only a few narrow frequencies you can use from the air and even then you are only allowed 10mW. The NTX2 is one of the few viable options for radio modules.

GPS – layout of a GPS module can be difficult and ideally you would keep it away from everything else. I opted for a pre-made module that could be soldered above and off to the side from the main board. It’s important to note also that many GPSs don’t operate above 14km height. Ublox GPSs have a flight mode that does work. For any others you will need to do your research before you buy/use.

Microcontroller – the ATMega 328 is a great option because it can be programmed from the very easy Arduino IDE. It will also run on 3v3 but only a 8MHz. However that’s plenty of processing power for reading a GPS and running a low baud-rate radio.

Temperature – a temperature sensor provides interesting data but many are not rated down to the -50′C that we could encounter at the tropopause. The DS18B20 is a good option because they are pretty cheap and are rated to low temperatures. You can get “external” ones which are sealed in a stainless tube for added protection. We’ll use one board-mounted one and one external.

Pressure – there are not too many “absolute” pressure sensors that I have found. The Honeywell HSCDANN001BA2A3 supposedly goes down to “0″ mBar and in practice performed well down to 8mBar on the flight. Its i2c interface is pretty easy to handle. Honeywell make about a zillion variants but many are “relative” sensors – they measure the difference between a certain pressure and atmospheric. You need an “absolute” pressures sensor because it’s atmospheric pressure we are measuring.

SD card – you could potentially surface-mount your own SD card holder but that’s pretty fiddly and I didn’t have enough board area anyway. SD-card breakouts are cheap and easily available so I elected to solder one underneath the main board to be compact and easy. A lighter approach would be to solder wires to the pads of a micro-SD adaptor and use it as a socket for a micro-SD card.”

 

 

Arduino tracks Near Space Launch_2

 

Arduino tracks Near Space Launch_5

 

June 6, 2014

Printable Self Assembling Lamp

at 6:22 pm. Filed under Cool Gadgets, Electronic Hacks

 Printable Self Assembling Lamp

 

 This Printable Self Assembling Lamp is an interesting concept. It starts out as a flat sheet and folds up into a box with an overhead light. The light turns on using a touch sensitive area. This is what Ikea needs to implement. :)

“The thing that comes out of the printer (it’s a rather special sort of printer) is a flat multi-layer sandwich of shape-memory polymers (they take care of the actual folding, triggered by heat), thin layers of copper, layers of paper and foam for structure, and double-sided tape to keep it all stuck together.”

 


June 4, 2014

Submersible Thruster

at 8:55 pm. Filed under DIY Hacks, Educational, Electronic Hacks

Submersible Thruster

 

If you are looking to design some underwater propulsion Dane from Transistor Man has completed a well documented Submersible Thruster build to get some pointers from.

The goal here is to design a submersible motor assembly that is able to accomplish the following:

  • Able to operate, submersed, up to 1 meter underwater while not transfering more than 10ml of coolant into the surrounding water per hour (not leaky)
  • Capable of delivering >5kw of motive thrust, when driven at 40v from a sensorless 3 phase motor drive.
  • Utilize a clear housing assembly to allow for easy-to-observe internal failures or leaks
  • Actively aid in cooling the motor assembly, using condutive heat transfer
  • Maintain a rotating shaft seal while operating up to 2k RPM. 
  • Design using easy to assemble, easy to reproduce components (ex: off the shelf bearing & shaft seal assemblies, waterjet aluminum)
  • Utilize a propeller designed to operate at 2k RPM without significant cavitation effects at speed*

 

Submersible Thruster Static Test 2 from Dane Kouttron on Vimeo.

May 15, 2014

Bruce in a Box Augmented Reality Project – Cornell University ECE 5760

at 2:34 am. Filed under Cool Gadgets, Electronic Hacks

Bruce in a Box Augmented Reality Project - Cornell University ECE 5760

 

Julie Wang developed the Bruce in a Box Augmented Reality Project for her ECE 5760 final project. This looks like a fun project, to see where the name comes from watch the video at 3:00.

“My system makes use of a variety of digital signal processing and computer vision techniques, resulting in a robust and reliable system. The hardware I utilized was the DE2-115 board by Altera, a Video Camera, and a VGA monitor. All of the functionality of my project is achieved through custom hardware written in Verilog. There are an extensive number of modules, and each one is designed to be as modular and parameterizable as possible.”

 

 

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