Hacked Gadgets Forum

May 19, 2017

Cost to Manufacturing Your Hardware Product

at 7:45 pm. Filed under Educational

 

 

Make has a great article that goes over what things to consider when wanting to manufacturer your hardware product. They bring up that the case often one of the largest costs of the product due to needing to make molds. There is the area between low and high volume manufacturing where using an off the shelf case would be cheapest but at some point getting a custom case manufactured for your product would make more sense.

“When bringing your product to market, scaling costs will likely be one of your biggest obstacles. Failing to plan for these costs will make it impossible for your product to succeed. For most products, the cost to transition from making a few prototypes to manufacturing thousands or millions of units is the most expensive obstacle.”

 


April 22, 2017

Power Supply Decoupling and Filtering

at 11:50 pm. Filed under Educational, Electronic Hacks

 

w2aew demonstrates the use of decoupling and filter cap usage. We have all seen large electrolytic caps and tons of small capacitors near chips on most circuit boards. Why are they used and without them what does the circuit look like. The live demonstration on the scope with the test PCB does a great job in demonstrating the difference with capacitor placement and operating without capacitors.

 


November 22, 2016

Poison Tap

at 10:18 pm. Filed under Complex Hacks, Computer Hacks, Educational

 

Samy Kamkar had built a device that is called Poison Tap. It is a Raspberry Pi Zero which plugs into the victims USB port. The device that looks like an Ethernet connection, your computer inherently trusts this connection and this is where the exploit starts.

  • emulates an Ethernet device over USB (or Thunderbolt)
  • hijacks all Internet traffic from the machine (despite being a low priority/unknown network interface)
  • siphons and stores HTTP cookies and sessions from the web browser for the Alexa top 1,000,000 websites
  • exposes the internal router to the attacker, making it accessible remotely via outbound WebSocket and DNS rebinding (thanks Matt Austin for rebinding idea!)
  • installs a persistent web-based backdoor in HTTP cache for hundreds of thousands of domains and common Javascript CDN URLs, all with access to the user’s cookies via cache poisoning
  • allows attacker to remotely force the user to make HTTP requests and proxy back responses (GET & POSTs) with the user’s cookies on any backdoored domain
  • does not require the machine to be unlocked
  • backdoors and remote access persist even after device is removed and attacker sashays away

 

 

 

 

 


November 18, 2016

How does Fusion Energy Work

at 9:08 pm. Filed under Educational

 

Kurzgesagt has released a great video that explains Fusion Energy.  At this time Fusion Energy is not practicable as an energy source but after Elon Musk is done with kitting out the Gigafactory he has the deep enough pockets that could toy with Fusion Energy.

“Fusion power is energy generated by nuclear fusion. Fusion reactions fuse two lighter atomic nuclei to form a heavier nucleus. It is a major area of plasma physics research that attempts to harness such reactions as a source of large scale sustainable energy. Fusion reactions are how stars transmute matter into energy.

In most large scale commercial programs, heat from neutron scattering in a controlled reaction is used to operate a steam turbine that drives electric generators. Many fusion concepts are under investigation. The current leading designs are the tokamak and inertial confinement by laser. As of January 2016, these technologies were not viable, as they cannot produce more energy than is required to initiate and sustain a fusion reaction.”

 

 

 

 

October 3, 2016

PID Motor Speed Controller Example

at 10:24 pm. Filed under DIY Hacks, Educational, Electronic Hacks

 

SomethingUnreal has built a simple system to demonstrate how a PID Motor Speed Controller works. The system is spinning a piece of cardboard on a toy DC motor. The motor is powered by an H Bridge. An optical sensor provides feedback to the system so that it can see the actual speed and adjust the H Bridge accordingly. The software running on the PC is very nice as it allows for lots of variable playing and graphical output so you can see what the system is doing.

 

 


June 7, 2016

Introduction to Analog to Digital Conversion (ADC)

at 2:01 am. Filed under Cool Gadgets, Educational

 

Bil Herd goes through a great Introduction to Analog to Digital Conversion. These days it is very simple to grab an analog reading and use it with a microcontroller with ease. This is because modern microcontrollers often have one or many ADC built in. Not that long ago a  would have been needed, this is still the case if a special ADC is needed for things such as high precision or very fast acquisition. Below you can see some items from the Microchip PIC 16 line of microcontrollers. This is just showing about a 5th of the available chips that can do ADC and it is sorted from cheapest to most expensive. Doesn’t take long looking at this chart to see that you can really get some big bang for the buck here. In volume the PIC 16F18323 will cost about $0.57 and this 14 pin count chip will give you 11 ADC inputs at a max resolution of 10 bits.

 

Microchip_ADC_Chips

 

 

 

 

 

May 28, 2016

IOT Long Runtime

at 6:18 pm. Filed under Cool Gadgets, DIY Hacks, Educational, Electronic Hacks

 

 

With the adoption of IOT long runtime on battery power is something that is a huge concern. We don’t mind charging our smartphones daily but if we have a dozen IOT devices in our home we would like them to be invisible and just operate for as long as possible without needing attention. Andreas Spiess has done some research using the popular ESP8266 and a variety of batteries. In his test he was sending data to an IOT database every 2 minutes but for many cases you may only need the device to wake and transmit once per hour, this would greatly extend the battery life.

 

 

 

 

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