Hacked Gadgets Forum

November 18, 2014

Self-Balancing Raleigh Chopper

at 3:36 pm. Filed under Complex Hacks, Cool Gadgets, Electronic Hacks

 Self-balancing Raleigh Chopper

 

It isn’t a simply task to make a self balancing anything. But if you are thinking of taking on the challenge has documented his design details for this Self-Balancing Raleigh Chopper that could give you a head start.

 

“Data from the IMU is read by the Arduino Mega 1280. I use a Mega 1280 because they are a lot cheaper online than the 2560, and about the same price as an Uno. They have several hard wired serial outputs which means I can conveniently use one of these to send motor control data to the Sabertooth 2 x 25 Amp power controller, and another to send data to the serial-LCD screen. The Deadman switch and steering buttons (actually brake levers from children’s e-scooters) when pressed will connect their respective Mega pins to ground. The deadman is for safety, if you let go of it all power to the motors will stop after half a second. Digital Pin 12 is connected to an LED. This LED stays lit on startup and goes out after a few seconds when the machine is ready to be brought “level” at which point it will start to balance itself. The potentiometer in the diagram is actually on the left handlebar and is a Magura 5K potentiometer “twist-grip” throttle handle designed for electric vehicles. Turning it makes the machine lean forwards a little, and so it starts to roll forwards. Let it spring back and machine will lean backwards a little and slow down. It makes a very effective method of controlling speed (as well as simply leaning like you would on a Segway).”

 


November 16, 2014

The Combinator – A Comparator Combination Safe

at 8:40 am. Filed under Electronic Hacks

The Combinator - A Comparator Combination Safe 

 

If you have some valuables that you need to keep safe you lock them in your safe (as the name implies). It probably has a dial that is used to dial in your secret combination. The Combinator is A Comparator Combination Safe just to spice things up a bit. You won’t find a microcontroller in this device even though it is an electronic safe, instead it uses all analog electronics to get the job done.


November 15, 2014

Shoulder Mounted Arduino Controlled Skull

at 10:34 pm. Filed under Cool Gadgets, DIY Hacks, Electronic Hacks

Shoulder Mounted Arduino Controlled Skull

 

Steven from Rimstar.org built an interesting spooky Halloween skull to scare anyone who walks by. The video below goes through the construction details.

“Two heads on a body are scarier than one so for halloween I mounted an Arduino controlled skull on my shoulder with the electronics in a backpack and a hand controller hidden in my hand with the cable running down my sleeve. The jaw opens, the eyes light up and it makes a scary sound.

The biggest issue I ran into was getting a sound synthesis that could be done by the Arduino while still using a servo. Most sound libraries I found either conflicted with the servo library or required use of an abstraction layer.

Luckily the Arduino comes with a tone() function that uses simple PWM to make an 8-bit type sound that did the job while not conflicting the the servo library.”

 


November 8, 2014

Smart Mailbox Project

at 2:38 am. Filed under Cool Gadgets, Electronic Hacks

Smart Mailbox Project

 

If you have a mailbox outside your house you might have to look at it many times to check to see if your mail flag is up. Of course this isn’t a very efficient use of your time. Wouldn’t it be great if there was some type of visual indicator in your house that would alert you when the mail has arrived? Wait no longer, Bob from Galactic Studios has built a Smart Mailbox Project that will come to your rescue. He provides all of the build details so you can also build your own. It uses a 16F1825 PIC microcontroller and a reed switches and an IR beam to monitor when the door is open, when there is mail in the box and when the flag is up. Bob shares some of the learning events that he had along the way that lead to some modifications.

I think the next version needs to add more sensors! What about a weight sensor so Bob can know how much mail he has, it could even guess that a weight over a certain preset is a package. I am also thinking with our connected life you need to get some kind of notification on your smart phone that a mail event has occurred. :)

Thanks for the tip Jim.

“When the mailman comes and delivers my mail, a toy mailbox inside the house raises its flag. When I go out to retrieve my mail the toy mailbox lowers its flag. If I go out again to put outgoing mail in the mailbox, the toy mailbox is smart enough to know not to raise its flag. If anything goes wrong, like the mailbox door is left open or the battery is low, the toy mailbox waves its flag as a distress signal.”

November 6, 2014

EWaste 3DPrinter

at 10:53 am. Filed under Complex Hacks, Computer Hacks, Cool Gadgets, Electronic Hacks

EWaste 3DPrinter

 

If you think the price of 3D printers is hitting the floor check out what built for $60. About 80% of this EWaste 3DPrinter is recycled computer parts which is abundant and readily available.

“First of all, we learn how a generic CNC system works (by assembling and calibrating bearings, guides and threads) and then teach the machine to respond to g-code instructions. After that, we add a small plastic extruder and give an overview on plastic extrusion calibration, driver power tuning and other few operations that will bring the printer to life. Following this instructions you will get a small footprint 3D Printer that is built with about an 80% of recycled components, which gives it a great potential and helps to reduce the cost significantly.”

 


October 19, 2014

Free Fun Flexible Watch

at 10:55 am. Filed under DIY Hacks, Electronic Hacks

 Free Fun Flexible Watch 

 

Check out the F*watch! It is a Free Fun Flexible Watch design by a team of 15 people with various backgrounds, the watch is a challenging project since in the end it can’t be the size of a lunch box, can’t weigh a pound and can’t be plugged into the wall for power. All of the electronics fit into a tiny printed housing and looks very functional.  Check out the items that are stuffed inside listed below.

“F*watch is a fully open electronic watch project featuring an integrated GPS receiver. The development started at CERN as an after-work project to make a special present for a retiring colleague who likes hiking and timing. The full design (electronics, mechanics and software) is available under free licenses and the design is exclusively made with free tools.

  • Sensors
    • GPS
    • Pressure sensor
    • 3D-accelerometer
    • Compass
    • Ambient light sensor
  • I/O
    • 128×128 pixels LCD with backlight
    • Micro-USB connector, 4 Buttons
    • Buzzer, vibrating motor
    • MicroSD memory slot
  • Various
    • 500 mAh Lithium-ion battery, fuel gauge
    • 4-layer PCB”

 

 

Free Fun Flexible Watch_3

 

\Free Fun Flexible Watch_2

October 16, 2014

DIY LM1876 Audio Amplifier Project

at 1:46 am. Filed under DIY Hacks, Electronic Hacks

DIY LM1876 Audio Amplifier Project

 

Our friends over at Electro Labs has a new project out, it is a DIY LM1876 Audio Amplifier Project. As usual it is a start to finish project that has full details so you can build your own.

“This is an audio power amplifier based on LM1876 which can deliver up to 20W per channel into 4 or 8 ohm load and guarantees less than 0.1% THD + N (Total Harmonic Distortion + Noise).

The amplifier is powered by -15 0 15 VAC symmetrical supply. The full bridge diode rectifier and the smoothing capacitors convert the AC input to ±21 VDC which is used to power LM1876. The inductors on the AC input line reduces the noise arising from the mains line.”

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