shred-Buddy3D Recycler – Multi Material pelletizer & Cutter

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Recycle Plastic Materials like a few meter leftover 3D Printer material or even Plastic Bottles into Pellets to create new Objects.

Do you own a 3D printer like most Maker and DIY’ler? 

almost run out of filament? … Again? What to do with the last few meters?

well… Make Pellets/Granules of it and use these to create new Filament with an Filament Extruder or an DIY Pellet extruder.

shred-Buddy3D Recycler – Multi Material pelletizer & Cutter – [Link]

LT8335 – Converter minimizes quiescent current

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Outfitted with a 2-A, 28-V power switch, the LT8335 2-MHz step-up DC/DC converter from Linear Technology operates from an input of 3 V to 25 V, suitable for applications with input sources ranging from a single-cell lithium-ion battery to automotive inputs.

The LT®8335 is a current mode DC/DC converter capable of generating either positive or negative output voltages using a single feedback pin. It can be configured as a boost, SEPIC or inverting converter consuming as low as 6μA of quiescent current. Low ripple Burst Mode operation maintains high efficiency down to very low output currents while keeping the output ripple below 15mV in a typical application. The internally compensated current mode architecture results in stable operation over a wide range of input and output voltages. Integrated soft-start and frequency foldback functions are included to control inductor current during start-up. The 2MHz operation combined with the small 8-lead DFN package, enables low cost, area efficient solutions.

LT8335 – Converter minimizes quiescent current – [Link]

Information storage at one atom per bit; a 1kB atomic memory

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A team of scientists at the Kavli Institute of Nanoscience at Delft University has achieved what may represent a limit in information storage density by creating a memory in which a single bit is represented by a single atom. By Graham Prophet @ edn-europe.com:

Specifically, the team created a 1 kByte memory array where each bit is represented by the (physical) position of one single chlorine atom. This equates to 500 Terabits per square inch (Tbpsi), 500 times better than the best commercial hard disk currently available. The team, led by the Institute’s Sander Otte, reported their work in Nature Nanotechnology on Monday July 18, 2016.

Make your own Attiny2313 development board

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In this tutorial you will learn how to build a basic development board for Attiny2313 microcontrollers.

Did you ever want to make your own development board with microcontroller and you didn´t know how .In this instructable I will show you how to make it.All you need is knowledge in electronics, designing circuits and programming.

Make your own Attiny2313 development board – [Link]

 

How to use a fully differential amplifier as a level shifter

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Loren Siebert @ ti.com discuss about how to interface signals that have a reference voltage that isn’t 0V while preserving the DC information.

Many signal paths are direct current (DC)-coupled, and this can lead to challenges when different portions of the signal path require different operating conditions. Many portions of a signal path are ground-referenced, where a signal varies at about an average or mid value of 0V. If all signals had the same reference voltage, DC coupling would be very easy. Unfortunately, that is not the case. Devices operating from a single supply like mixers or analog-to-digital converters (ADCs) will typically have a reference voltage (common mode) that is not 0V. Interfacing these devices while preserving DC information can be challenging.

How to use a fully differential amplifier as a level shifter – [Link]

MemType USB Stick With All Your Passwords

Noela and Miguel from Area0x33 made a really helpful tool on hackaday.io. They designed a fully open source hardware USB stick to store your username/password pairs on.

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MemType uses Atmel ATtiny85 MCU and V-USB to do the communication over USB. V-USB is software-only implementation of a low-speed USB device for Atmel’s AVR microcontrollers.

Memtype Schematic
Memtype Schematic

Memtype uses [NOEKEON] to encrypt the stored values with 2K flash reserved for storage, and a PIN number, settable by user, to protect your information if your stick was lost. There is no need for any drivers, because Memtype is numerated as a keyboard. You just need to plug it in usb, enter the PIN code, and then choose your username/password. It uses 5-way tactile switch as user input.

To make things easier, they labeled each username/password with names, and with import and export features supported in .xml form. These features managed by a software tool called MemTypeTool.

MemTypeTool

You can purchase Memtype from tindie for 24$, and source files are available on Github for both hardware and software.

For more information on how Memtype works, please watch this video below:

Differential Pair Routing and Meander Tool in Eagle CAD

When you see some board designs, especially ones with high speed signals or differential pair signals, then you will notice a lot of zigzag/meander lines on PCB.

If you’re wondering whether you can do differential pair routing, then the answer is simply yes by using Meander tool.

First, let’s see how we can draw Differential Pair in Eagle. To do so, follow these steps:

  1. Select two lines, give one of them any descriptive name you want ended with _n and the give the name name to the other except that it should be ended with _p.
  2. When you route them, you will notice that trace is drawn for both of them, if you want to trace just one, then you need to press esc.
  3. You can determine the clearance between both of them while drawing by changing clearance value from default class (type “class” in command line).

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Now, to use Meander tool, follow these steps:

  1. Select Meander Tool from the left sidebar.
  2. When you click on any route, you will see the length of this route. You will need to select a reference length to measure if you want Menders to match the length. Note that there is
    no need to have any special name for these two lines. To select the reference wire click ctrl+left mouse button on the trace. Now hit on any trace with left mouse button and it will be compared to the reference length (a percentage will be shown).
  3. If you failed to draw the Meanders, then try a smaller value of clearance for default class (type “class” in command line).

MeanderEagle

They’re ‘Not’ JUST Capacitors

James Lewis from Kemet has made a presentation to address some of misconceptions about capacitors like how you should de-rate capacitors.
James said that de-rating depends on the chemistry and configuration of a particularly capacitor.  So he started by asking a question: Should capacitors be de-rated 50%? And the answer was not a simple true or false. It was: it depends…

James talked about the typical construction of Multilayer Ceramic Capacitor(MLCC), Aluminum Electrolytic(wet one), Tantalum, Polymer Electrolytic and Supercapacitors.

James talked about the Temperature Coefficients diagram for various types of Ceramic Capacitor like: YV, Z5U, X5R, X7R, U2J and C0G [Ceramic Capacitor].

Temperature Coefficients diagramWe can see that MLCC capacitance ranges, and Coefficients depend on type.

Another key point was about capacitance change vs DC bias in MLCC. It’s about the role of package size in capacitance lose over DC bias. He compared 10nf and 6.3v rated 1206 package capacitor with same one in 0805 package. Results showed that the 1206 one lost 2% of capacity, while the 0805 lost 50% at 6V. James said that the 0805 package is thinner than the 1206 one, so we need to put more layers into the design to get more capacity. So thinner package leads to worse coefficients.

He pointed out that the capacitance of Wet Aluminum Capacitors is affected on shelves, and he explained how to reform/self-heal them.

James also explained why it’s safer to use Polymer Electrolytic rather than using Tantalum Capacitors, and why Polymer Electrolytic when fails, it fails safely.

TantalumsHe ended his presentation up by talking about Supercapacitors, and he made a walkthrough the tools Kemet provides:
KEMET Catalog App for Mobile Devices
Capacitor Simulator K-SIM 
KEMET Engineering Center (capacitor technical content)

[Presentation Slides]

Temperature controlled Fan

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Ahmad Al-Shalabi and Bassma Karbouj show us how to control a DC fan using easy to find components. The fan works when temperature reach into pre-specified threshold.

The purpose of this project is creating a cooling system by controlling in a DC fan in a simple way without using Microcontrollers or Arduino but by using electronic components that it’s very simple and available. The DC fan controlling achieved by a Thermistor and which is a type of resistor whose resistance is dependent on temperature. there is two type of thermistor that is NTC ” Negative Temperature Coefficient” , PTC ” Positive Temperature Coefficient “

Temperature controlled Fan – [Link]