Hacked Gadgets Forum

February 20, 2014

Arduino Network Uptime Monitor via Twitter

at 8:02 pm. Filed under DIY Hacks, Electronic Hacks

Arduino Network Uptime Monitor via Twitter


If you want to know when your network is having issues and have some Arduino gear kicking around this Uptime Monitor Project by www.hackshed.co.uk allows you to get instant Twitter updates as soon as there are problems.

Thanks to Steve for sending this in.

“It was actually surprisingly easy; we had the Twitter posting code from the previous project and we found an Arduino ICMP library so that we could test a ping to the hosts and see if it was responding or not, we added this to our task scheduling code and the rest just fell into place.”

Single Chip Provides 3D Images Inside the Heart and Blood Vessels

at 4:49 pm. Filed under Complex Hacks

_Single Chip Provides 3D Images Inside the Heart and Blood Vessels_4


When you want to make a project small you might grab an Arduino Pro Mini instead of a full sized Arduino board but what if your project needs to fit into a blood vessel? F. Levent Degertekin, a professor in the School of Mechanical Engineering at the Georgia Institute of Technology is developing some miniature technology that will revolutionize how medical doctors will look at the heart and blood vessels.

Via: Electronics Lab

“The device integrates ultrasound transducers with processing electronics on a single 1.4 millimeter silicon chip. On-chip processing of signals allows data from more than a hundred elements on the device to be transmitted using just 13 tiny cables, permitting it to easily travel through circuitous blood vessels. The forward-looking images produced by the device would provide significantly more information than existing cross-sectional ultrasound.

The dual-ring array includes 56 ultrasound transmit elements and 48 receive elements. When assembled, the donut-shaped array is just 1.5 millimeters in diameter, with a 430-micron center hole to accommodate a guide wire.”



_Single Chip Provides 3D Images Inside the Heart and Blood Vessels_1


_Single Chip Provides 3D Images Inside the Heart and Blood Vessels_5

February 19, 2014

Nibbler – Home Made CPU

at 11:39 am. Filed under Complex Hacks, DIY Hacks

 Nibbler - Home Made CPU


Steve from the Big Mess o’ Wires blog has built a Home Made CPU called the Nibbler. Why the name? Because it is a 4 bit CPU (half of a byte is a nibble). Other than a creative name the project is quite an undertaking, it is built using 7400 logic all wire wrapped up for easy debugging. 🙂

“Some specs:

  • 4 bit custom-made CPU
  • 12 bit addressing, 4K address space size
  • Harvard architecture – separate program and data memory spaces
  • 2 MHz clock speed, 2 clocks per instruction = 1 million instructions/sec
  • Thirteen 7400-series chips in the CPU data and control paths
  • Two 28C16 EEPROMs store microcode for generating internal control signals
  • 4K x 4 SRAM (CY7C168A)
  • 28C64 EEPROM stores programs
  • Four pushbutton inputs
  • 16 x 2 character LCD
  • Audio speaker
  • About 100 mA current draw at 5V”


Nibbler - Home Made CPU_3


Nibbler - Home Made CPU_2

February 18, 2014

DIY Smart Watch

at 11:29 pm. Filed under DIY Hacks, Electronic Hacks

 DIY Smart Watch_1


Smart Watches are taking quite a while to catch on. I think when the price comes down to the $50 range or they are included with your smart phone I think we will see mass adoption but until then I think they will remain rare. But if you want one now and have time for a new project why not build your own! With a few well chosen building blocks you can plug a few things together and quite quickly have a functional smart watch. The watch above was built using a Arduino Pro Mini, HC-06 Bluetooth module and a 0.96’’ OLED display

Via: Hack a Day

“Imagine a very small computer that you can wear on your wrist. Arduino board is a micro-processor and a storage, and there’s only one input method : a button. Bluetooth is to communicate with other devices, and the battery would be necessary for power. I’ll install an Android app for collecting or editing various RSS and system information and for notification on the Android device. This app will also process the data because the Arduino board has very limited resources.”


DIY Smart Watch_3

February 17, 2014

Open Bitcoin ATM

at 10:08 pm. Filed under DIY Hacks, Electronic Hacks

Open Bitcoin ATM


This Open Bitcoin ATM might be a simply way to distribute Bitcoin in establishments that want to use it for sales. Just make sure no one walks away with the big box of cash.

“Open Bitcoin ATM is the worlds first open-source automated teller machine for education and experimentation.

Want to make one? Here’s a step by step tutorial. It takes about 7 – 10 hours to build with simple tools. Cost of components are less than $500 new but used parts can be purchased for even less on eBay.”


February 15, 2014

Candle Powered Fan

at 6:57 pm. Filed under DIY Hacks

Candle Powered Fan


This Candle Powered Fan uses some small candles to heat one side of a TEC-module, this creates a voltage that will operate the fan. A CPU heatsink is used on the hot and cold side of the module and the result is enough power to spin a small DC fan.

Components used:
• CPU-cooler (cold side): Zalman CNPS5X (Base plate: 33x33mm)
• CPU-cooler (hot side): From an old PC (WxLxH=78x63x67mm)
• TEC-module: TEC1-07110T200 (30x30x3.3mm)
• DC Motor: 1,5-3V
• USB-fan (metal, only needed the fan)

• Thermal paste: Arctic MX-4
• A piece of wood
• Two pull springs
• Four M4 bolts and two M3 bolts
• Aluminum tubes (optional)”



February 14, 2014

Time Plotting Clock

at 11:24 pm. Filed under Cool Gadgets, DIY Hacks

Time Plotting Clock


The Time Plotting Clock mechanism is fantastically simple, 3 tiny servo motors allow the erasable marker to be moved along the drawing surface and raised when no contact with the surface is desired. This allows the pen to write the time. There is also a tiny eraser located in the upper right corner, when the next minute is ready to be drawn the pen grabs the marker and erases the previous time before drawing the new time.

Thanks for the tip Stan.

“You need:
– Laser cutter or 3D printer
– 1 Arduino
– 3 servos
– 1 dry wipe pen
– M3 nuts, bolts, thread tap”


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