Hacked Gadgets Forum

September 9, 2015

DIY Shake Flashlight

at 6:53 pm. Filed under DIY Hacks, Electronic Hacks

DIY Shake Flashlight


When the power fails and you are stumbling around the house your flashlight batteries will inevitably be dead. A simple solution to this issue is to use a flashlight that doesn’t need batteries. With low current LEDs you can dynamically generate the power you need to light your path by just a few shakes. Of course you can purchase one but building one is much more fun!

“Materials needed: Small cut of PVC pipe, magnet wire, neodymium magnet, LED’s, 4 diodes or 1 diode bridge, capacitor, resistor, wire, breadboard, and electrical tape.”


September 1, 2015

POV Hard Disk Drive Clock

at 3:44 pm. Filed under Computer Hacks, Cool Gadgets, Electronic Hacks


Using an old hard drive, some 1 watt LEDs, a complete redesign of the hard drive motor drive circuit and an Arduino Marcin Gosiewski (damago1) has built a great looking clock. The display is nice and compact since he is using a 3.5 inch hard drive as his base.

“The project involves controlling HDD motor (3 wire brushless dc electric type BLDC) using open loop control without feedback, and using back electric motor force feedback to synchronize engine pulses with optimal point in time for them. Digits are displayed by flashing 1W power LED-s behind rotating disc with painted digits. Each flash is circa 150 microseconds. Due to POV (persistence of vision) effect the digits look very stable for the user. I am not using any special controller. Only Arduino, H-bridges for driving motor coils, and circuit for obtaining BEMF (back elecric motor force) from each coil and converting it to digital (high/low) signal to drive Arduino interrupt. I have designed my own custom board which is a modified Arduino (something between UNO and PRO NANO) + added additional parts including real time clock. It is designed to fit on the back of a standard 3,5″ HDD. Software is very dependent on interrupts. I am using not only officially available interrupts (attachInterrupt) but also additional libraries to use all available timers and interrupts.”

August 31, 2015

Verilog for FPGA

at 11:18 am. Filed under Complex Hacks, Electronic Hacks

Verilog for FPGA


 from Hackaday has some nice tutorials to get you up to speed in using an FPGA. 

“Whatever tools you use, the workflow for any FPGA is basically the same, although details of the specific tools may vary. Sometimes the names vary a bit, too. Although you write code in Verilog, the FPGA has different blocks (not all vendors call them blocks) that have certain functions and methods they can connect. Not all blocks have to be the same either. For example, some FPGAs have blocks that are essentially look up tables. Suppose you have a look up table with one bit of output and 16 rows. That table could generate any combinatorial logic with 4 inputs and one output. Other blocks on the same FPGA might be set up to be used as memory, DSP calculations, or even clock generation.”


August 29, 2015

50,000V High Voltage Power Supply Build

at 1:40 pm. Filed under Cool Gadgets, Electronic Hacks

50,000V High Voltage Power Supply Build_2 


 built this interesting 50,000V High Voltage Power Supply which is fun but can be dangerous if not given the respect that high voltages demand. If you are interesting in getting some serious spark jumping action this build is for you. Best of all the main component can be found for free from an old TV.

“This high voltage power supply has been designed to output a fixed voltage of around 50kV, it could easily be converted to an adjustable supply by connecting a variac in case of using transformers or by adding some extra circuitry to regulate the power going in. I initially thought about a high frequency PWM to regulate the power going into the capacitors, but I abandoned the idea. I found that adjusting the frequency is enough to make the voltage vary by a significant amount, allowing some control over it, this happens because the flyback must operate at a certain frequency in order to maximize the output.”



50,000V High Voltage Power Supply Build

August 25, 2015

Repair Broken IC Pins using a CO2 Laser Cutter

at 8:45 am. Filed under Electronic Hacks

  Repair Broken IC Pins using a CO2 Laser Cutter_2 


If you have an IC with broken pins near the die normally this chip is dead but if you have a CO2 laser cutter and a bit of time you might be able to laser away some of the die so you can access the internal chip traces. Have a look at ca.rstenpresser.de for some ideas.

“Since a few of the Pads already were delaminated I decided to do a repair instead of soldering in a new CPU. For a repair I would need to get rid of the expoxy mold to directly acces the pins of the leadframe. Initially I was thinking of using a ‘dreml’ tool to remove the exoxy, but watching the Uncaging Microchips talk at 31C3 taught me that using a CO2-Laser will also work.”



Repair Broken IC Pins using a CO2 Laser Cutter_4


Repair Broken IC Pins using a CO2 Laser Cutter


Repair Broken IC Pins using a CO2 Laser Cutter_3

August 21, 2015

Reflow Part Melting

at 10:54 am. Filed under Educational, Electronic Hacks


You need to be careful when reflowing parts on your circuit boards. Different plastics can lead to a bad day for you parts. If a part was just meant to be wave soldered the actual part may not be capable of the extreme heat and duration of the reflow process. Dave found this out the hard way when he was attempting to reflow a board from a TV that was being repaired.


August 3, 2015

Electric Vehicle Kit That Can Be Built in a Week

at 10:04 am. Filed under Complex Hacks, DIY Hacks, Electronic Hacks

Electric Vehicle Kit That Can Be Built in a Week


This The Switch Lab electric vehicle kit is designed for students to build it in a classroom. It comes with everything you need to build a sporty electric vehicle in about one week. The kit starts at around $20K and is designed to be built by one class and then stripped back down for the next class to build. The basic model comes with lead acid batteries, the higher models some with lithium ion batteries. The open chassis design is perfect for learning since there are no body panels to work around and obstruct the important bits that make the vehicle work.

Via: Make 

“The SWITCH Lab was designed to allow the instructor complete flexibility in the classroom. We provide over 30 hours of lecture material and 40 plus hours of lab projects, including the assembly of The SWITCH electric vehicle. Instructors can include our lectures as presented, skip some, augment others, or create their own. The class can be taught as an intense two week summer program or 17 week semester program or anything in between.”




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