Hacked Gadgets Forum

February 26, 2014

DIY Four-Terminal Kelvin Sensing Connection

at 11:41 pm. Filed under Insane Equipment

 

If you are taking very low resistance measurements you have a few options. Many meters have a low ohms mode where you are able to zero out the meter resistance but the best method is using a Four-Terminal ohm meter and appropriate connection. In the video above ROBRENZ shows us some typical issue with the clips that are currently available and as a machinist he also demonstrates with some very intricate work that it is possible to improve on what is being used in industry. If that isn’t enough he also demonstrates how the current design of kelvin probes is flawed, the second video demonstrates his solution to the issue. Of course if he was selling one of these solutions it would probably cost more than the meter it is to be used on and unless you are measuring something of extremely low resistance the benefits would not warrant the insane build effort.

 


February 8, 2014

Magnet Inside a Large Copper Tube

at 10:03 am. Filed under Insane Equipment

 

Another great video showing the Lenz’s Law at work. We have seen this demonstrated before but the effect never gets old.

Via: Adafruit


January 21, 2014

RumbleRail – Floppy Disk Jukebox

at 6:51 pm. Filed under Cool Gadgets, DIY Hacks, Electronic Hacks, Insane Equipment, What Were They Thinking

 _rr_lumi_1

 

 If you still have a few floppy drives left over after making your Floppy Drive CNC machine have a look at making some music by making a Floppy Disk Jukebox!

 “The overall setup is completly modular. Each floppy is connected to its own floppy driver (rrfdc), which in turn speaks I²C with the main board (rrcmd). On power-on the main board auto-discovers the connected floppies and adjusts the software to utilize the available drives. In theory the amount of floppies connected to RumbleRail is only limited by I²C address/bus restrictions.

The most important feature of RumbleRail is the ability to run standalone. After being powered-on, the main board scans the hotswapable SD card (rrsdc) and lists its content on the display. The user can browse through the selection using the rotary encoder and, once a song is selected, the main board decodes the MIDI file and streams the notes to the floppy drivers.”

 

 


December 21, 2013

Arduino used in Semi-Automatic Production Line Equipment

at 7:54 pm. Filed under Insane Equipment, What Were They Thinking

Arduino used in Semi-Automatic Production Line Equipment

 

When you walk through a factory full of automated machines that are doing repetitive tasks you will usually see a large metal electrical cabinet beside each machine. Inside that box will most likely be a PLC that is controlling the machine by monitoring inputs and controlling motors and valves. This all sounds fine until you look at the price of this equipment, $10 or $20K will get you a decent PLC system but you will get a truck load of Arduino gear for that.

Alexander Kozusyev turned to Arduino to provide some simple automation to a production line. I can just imagine the amount of money that was saved. I understand that an Arduino isn’t a true comparison to the rugged nature of PLC equipment that will run in the nastiest production environment in sweltering heat 24 hours a day. But in some situations I think it might make an interesting alternative.

Via: Arduino Blog

“Production line has two independent CNC 3-axis manipulator. The first spraying of release agent. Second automatic pouring polyurethane into the mold. Before spraying or pouring read RFID unique code for the mold, and then loads the G-CODE from the database server based MySQL. After pouring, the mould is moved to the waiting area.”

 

December 1, 2013

Ambient Backscatter – Wireless Power and Communication with No Batteries

at 7:10 am. Filed under Cool Gadgets, Insane Equipment

 ambient_backscatter

 

Today we have lots of battery free electronic devices such as RFID which in most cases gets powered wirelessly from the reader. What would the world of electronics be like if our small electronics that only consumed a small amount of energy could be powered by the RF signals that are already around us. Ambient Backscatter does just this and has an endless number of interesting applications. Just think of the possibilities of device placement if servicing batteries was no longer a concern. In our modern cities we have no lack of RF noise so device placement should not be an issue.

I have no knowledge in this field so hopefully someone can chime in here. If this becomes popular and we have tens of thousands of these devices all over the place will the load on transmission towers increase due to this power leaching? Will TV and cell towers need to increase their power output to achieve the same coverage as they had before these devices were being used?

 “Ambient Backscatter transforms existing wireless signals into both a source of power and a communication medium. It enables two battery-free devices to communicate by backscattering existing wireless signals. Backscatter communication is orders of magnitude more power-efficient than traditional radio communication.”


November 18, 2013

Wire Bonding

at 11:31 pm. Filed under Insane Equipment

 

If you have never seen wire bonding in action you have to see this. Gold is the most common wire that is used for bonding but the wire is very thin so there isn’t much gold wire by weight that is actually used. Check out the 1:20 minute mark to see a how the wire is actually shaped and formed as it comes out to add the bends that might be needed to get exactly the right shape of wire.

 

Gold Wire Bonding_2

 

Gold Wire Bonding_3

 

Gold Wire Bonding_4

Gold Wire Bonding

November 17, 2013

Hard Disk Clock by Martin Stromer

at 3:49 pm. Filed under Crazy Hacks, DIY Hacks, Electronic Hacks, Insane Equipment

Hard Disk Clock by Martin Stromer_3338278

 

Martin Stromer made a great looking Hard Disk Clock that is actually very easy to read and looks like a great art piece at the same time. It is based around the ATMega16 Microcontroller.

“The time is set by turning the disk and setting the read/write head to the desired time by hand. Then you push the reset button on the back (the upper one of the tree on the back) and the clock measures the position of the indicators and sets its internal electronic quartz clock accordingly. For measuring the hour I painted a binary pattern onto the backside of the disk which is illuminated by infrared LEDs and detected by matching infrared light sensors.

For detecting the set minute the read/write head is driven to the outside of the disk until it interrupts the a light barrier. The steps necessary for that are counted, the internal clock is set and the head is driven back to its previous position.

Because the current time is stored in an internally the time display can be restored if it was changed by accident. This does the middle button on the back. Pushing it will turn the disk and move the head to the correct position.”

 

 

 Hard Disk Clock by Martin Stromer_3338298

Hard Disk Clock by Martin Stromer_3338288

Internal Links:

Categories:

Search:

Google
Hacked Gadgets
Web

Site Sponsors:

Nuts and Volts Electronic Labs Trossen Robotics Free Technical Publications Blue LED

 

Recent Comments:

Site Rating:

More RSS Feed Options

Site Sponsors:

 

Interesting Sites:

Site Videos:

Incoming Links: