Hacked Gadgets Forum

January 29, 2015

DIY AVR Function Generator

at 10:36 pm. Filed under DIY Hacks, Electronic Hacks

DIY AVR Function Generator


The Big One built this DIY AVR Function Generator, it is housed in a nice looking Hickory enclosure, has some buttons for adjustments and a 16×2 text LCD as a display. He is also working on a power supply that will be housed in the same enclosure type. 

“What this function generator can do: 

  • Generate square waves at up to 10MHz, either directly output from an AVR’s pin, or buffered via an op amp (the slew rate of the op amp will determine the upper limit of the square wave output). The square wave output is in the range 0 – 5v.
  • Generate a number of sampled waveforms from between 2.56kHz and 10Hz (in 10Hz increments). Sampled waveforms include Sine, Triangle, Sawtooth (up and down), Staircase (up and down), and Square. These waveforms are output in (user selectable) 0 – 5v or -5 – 5v range.
  • Generate a PWM signal appropriate for controlling hobby servos. The user selects a PWM phase between 500us and 2540us., with a set period of 20000us.”


DIY AVR Function Generator_2


January 24, 2015

Arduino Powered Thermostat

at 9:43 pm. Filed under DIY Hacks, Electronic Hacks

Arduino Powered Thermostat


Your thermostat is probably one of the most boring pieces of technology in your house. This Arduino Powered Thermostat lets you take control over your furnace and make it work the way you want it. 

“The three zone system  is also equipped with DS18B20 temperature sensors, DS1307 RT Clock, 16×2 character display, LCD keypad Arduino shield, along with various miscellaneous wire leads, connectors and resistors. 

On the software side, hbomb9000 used an add on for SublimeText known as Stino, as well as two libraries: OneWire and DallasTemperature.”

January 22, 2015

KeySweeper – Microsoft Wireless Keyboard Sniffer

at 11:19 pm. Filed under Cool Gadgets, Electronic Hacks

KeySweeper - Microsoft Wireless Keyboard Sniffer_2


Wireless devices are convenient but must be used with caution. Samy Kamkar shows us how a simple wireless keyboard can be giving away your secrets. He built this KeySweeper, it is a Microsoft Wireless Keyboard Sniffer that is built into a innocent looking USB wall charger.

Via: The Hacker News

“KeySweeper is a stealthy Arduino-based device, camouflaged as a functioning USB wall charger, that wirelessly and passively sniffs, decrypts, logs and reports back all keystrokes from any Microsoft wireless keyboards (which use a proprietary 2.4GHz RF protocol) in the area.

Keystrokes are sent back to the KeySweeper operator over the Internet via an optional GSM chip, or can be stored on a flash chip and delivered wirelessly when a secondary KeySweeper device comes within wireless range of the target KeySweeper. A web based tool allows live keystroke monitoring.”


KeySweeper - Microsoft Wireless Keyboard Sniffer

January 19, 2015

DIY Dynamic Electronic Load

at 7:33 pm. Filed under Electronic Hacks

DIY Dynamic Electronic Load


Jay_Diddy_B, a contributor on the EEVblog Forum built a great looking DIY Dynamic Electronic Load. He used LT Spice to model the design before it was built, the test result look quite good. Nice thing about the design is that there are no specialty parts, chances are you have most of the things on hand to get building right now.

“The dynamic load steps the load current so that the transient response of the power supply being tested can be observed.


0-5A maximum continuous current
0-5A pulsed current at 330Hz”


DIY Dynamic Electronic Load_1

DIY Dynamic Electronic Load_2

January 17, 2015

Raspberry Pi Controlling an HCCI Engine

at 6:05 pm. Filed under Complex Hacks, Cool Gadgets, Electronic Hacks



This HCCI Engine Controlling Raspberry Pi setup reads in 240,000 samples per second. I had never heard of an Homogeneous charge compression ignition (HCCI) engine other than a diesel that simply compressed the air fuel mixture till combustion although I guess that is what some of those cars from the 80 were doing when they would continue to run after the key was turned off? I had always thought that gasoline engines needed a spark plug. But like many things if you through enough tech at it you can overcome the issues. 

“The Pi is recording data about pressure in each of the engine’s cylinders, about the angle of the crank and about heat release – and on the back of that, it’s subsequently controlling the engine in real time over a controller area network”


January 14, 2015

Remote Control Turned into an Oscilloscope

at 12:36 pm. Filed under Cool Gadgets, Electronic Hacks


What happens when a remote control manufacturer makes their hardware robust and easy to hack? It gets turned into an Oscilloscope! Check out the Betty Check – Betty Remote control turned into a multi function electronic tester. If you are have one of these remotes and need some additional information to modify it have a look at this page, it demonstrates much of the hardware in great detail.

The remote comes with a 32 bit arm processor, on board flash, an RF transceiver with spi interface and a 128 X 160 pixel display

 Via: Sechserfan in the HG Comments


January 12, 2015

Goal Light and Horn Project

at 7:07 pm. Filed under Cool Gadgets, Electronic Hacks

 Goal Light and Horn Project  


JLocke from the Parallax Forum put together this interesting Goal Light and Horn Project that should be a big hit with sports fans. With the press of a button you will get a celebration light and some audio of your choice. Love the industrial look of the project. The custom PCB looks nicely laid out!  I am thinking the next logical step is to make this project web connected to allow it to activate automatically when your favorite team scores! 


Goal Light and Horn Project_3


Goal Light and Horn Project_2

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