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9 Mar 2015

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by 3dpburner.blogspot.com.es:

It is created with the same concept as RepRap, using 3D printed parts and some easy to find “vitamins” (non printed hardware).

I tried to make it as cheap as possible, by using cheap electronics and a “low power” laser (a laser diode).
The X/Y working area is fully customisable and the max working object height is up to 50-60mm.

The cutter/engraver basically uses the 3D printed parts, M8 and M3 size hardware (rods, nuts,washers and bolts), some small bearings and GT2 pulleys and belts. I got most of the parts from my “old” RepRap printer.

The X/Y working area is fully customsable by changing the length of the 8mm rods.

The electronics uses an Arduino UNO with a cheap CNC shield and two Pololu based stepper drivers to drive two NEMA17 stepper motors.

3dpBurner – A 3D printed laser cutter/engraver – [Link]

29 Jan 2015

FUQ36YAHVVKH6NM.MEDIUM

by ronnietucker @ instructables.com:

So, first thing I did was to get the LCD and keypad working together.

For this I pretended that it was some sort of arm/disarm (or entry/exit) thing.

My code for this part is at: http://pastebin.com/YndLneqm.

Getting the LCD wired up was tricky as most wiring diagrams for it don’t show the last two pins wired up and these are required for the back light. Check my snazzy Fritzing wiring diagram to see how I wired up my LCD screen, pot (for adjusting brightness) and keypad. The pins for them all are also mentioned in my code.

Arduino Laser Trip Wire – [Link]

26 Jan 2015

germanium-tin-laser-2

by Colin Jeffrey @ gizmag.com:

Swiss scientists have created the first semiconductor laser consisting solely of elements of main group IV (the carbon group) on the periodic table. Simply, this means that the new device is directly compatible with other elements in that group – such as silicon, carbon, and lead – and so can be directly incorporated in a silicon chip as it is manufactured. This presents new possibilities for transmitting data around computer chips using light, which could result in potential transfer speeds exponentially faster than possible with copper wire and using only a fraction of the energy of today’s integrated circuits.

First germanium-tin semiconductor laser directly compatible with silicon chips – [Link]

8 Dec 2014

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Andrew Sarangan @ edn.com:

Why make your own printed circuit boards when you can get them commercially made for low cost? For one, it can take one to four weeks to receive the boards. For prototyping, this can be a major hurdle. Each design iteration will then take a month or more, and a project may need many months to get done. The DIYer can fab the board and assemble everything in one evening. That advantage is really hard to beat.

Besides time, there are other reasons to make your own board. Commercial services charge by board size, not complexity. Larger boards will cost more even if they are completely blank. I once had to make an oversized PCB because the parts had to be spaced far apart. It was a very sparse board, but getting it made from even the cheapest commercial source would have been expensive.

Make high-quality double-sided PCBs – at home – [Link]


9 Nov 2014

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A state-of-the-art, mobile maker space, that brings the richness of hands-on making to you.

Tesla Truck (www.teslatruck.co) – is a  mobile maker-space and a cutting edge prototyping facility equipped with  3D printers, Laser Cutters and CNC machines. Tesla Truckʼs mission is to enable students, teachers, makers, and other  creative minds to collaborate, innovate, and create in a dynamic and accessible space. Tesla Truck brings the richness of hands-on making to your community by delivering a cutting edge fabrication facility on a mobile platform.

Tesla Truck: A Mobile-Maker Space for the Masses! – [Link]

13 Oct 2014

FBS5OK4HZN0SSTG.MEDIUM

by mlerman @ instructables.com:

This is the second version of my E260 modification. It uses an ATtiny13 MCU to control the timing of the printer and make it possible to print double sided PCBs at home.

As an electronic hobbyist and inventor I often need to make printed circuit boards (PCBs) in single or small quantities. Usually these are relatively simple circuits, an MCU, some input conditioning circuitry, some output circuitry, and usually they are single sided or perhaps double sided, with just a few vias. And usually I want them right now!

Toner Transfer (TT) has become the method of choice for most hobbyists. A laser printer is used to print an image of the PCB on special “transfer paper” which is then placed on the bare copperclad board and either ironed on or run through a modified laminator to transfer the image to the copper. When the PCB is etched, the toner acts as a resist, preserving the copper below it while the rest of the copper surface is etched away.

Modification of the Lexmark E260 for Direct Laser Printing of Printed Circuit Boards – [Link]

6 Oct 2014

NewImage41

A group of engineers have developed the smallest organic laser [via] :

The 8-µm-long device, which looks like a suspended bridge riddled with holes, is carved into a silicon chip coated with an organic dye. Integrated into microprocessor chips, such tiny lasers could one day speed up computers by shuttling data using light rather than electrons. They also could be valuable for sensors and lab-on-a-chip devices.

Engineers Build Ultrasmall Organic Laser – [Link]

29 Jul 2014

PlasmonLaser

by elektor.com:

A new type of sensor being developed by a team of researchers at the University of California, Berkeley based on Plasmon laser technology is so sensitive it may be able to detect the presence of land mines in situ. In a paper published recently in the journal ‘Nature Nanotechnology’ a team of researchers led by Xiang Zhang, UC Berkeley professor of mechanical engineering, have outlined how they have been able to find a way to increase the sensitivity of a light-based plasmon sensor to detect minute concentrations of explosives. The new sensor consists of a layer of magnesium fluoride sandwiched between a semiconducting layer of cadmium sulfide, and a sheet of silver.

New Sensor could sniff out Land Mines – [Link]

16 Jul 2014

Laser-Engraver-38x38_cdrom_1-600x450

Here’s a DIY 38mm x 38mm laser engraver build using CD-ROM/writer on ATmega328p by Davide Gironi:

A laser engraving machine, is a tool that uses lasers to engrave an object.
To build this tool I’ve used two old CD-ROM writer that lays around in my garage.
The X/Y positioning system it is build using the CD-ROM motor assembly. For the engraving laser i use the CD-ROM writer laser.
With this hardware the engraving area are will be almost 38mm x 38mm.

[via]

A DIY laser engraver build using DVD and CD-ROM/writer – [Link]

3 Jul 2014

simple_laser_power_meter_1-600x593

Here’s a cheap and simple Laser Power Meter LPM for small power source, based on “MarioMaster LPM meter” by Davide Gironi:

This type of meter uses a ThermoElectric Cooling module (TEC) to measure the power of a laser. The TEC will absorb the laser light, and transform the heat generated by the laser beam to an electrical signal.
An operational amplifier is used then to amplify the signal and ouput it to a volt meter.
Voltage meter will display the power in W unit of the laser beam you are testing.
The TEC takes a little amount of time to heat, so wait until your reading became stable.
This type of meter is simple and cheap to build.
It can measure laser power up to 2W, with an accurancy of +-10mW.

[via]

A cheap and simple Laser Power Meter LPM for small power source  – [Link]

 



 
 
 

 

 

 

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