Dual Adjustable Regulated power supply 1.2V TO 37V DC

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This project is a solution to power up most of devices or projects requiring dual (+/-) adjustable power supply. The circuit is based on LM317 positive and LM337 negative voltage regulators. LM3X7 series of adjustable 3 terminal regulators is capable of supplying in excess of 1.5A over a 1.2V to 37V DC output range. On board TO220 Package with heat sink can handle maximum load current. Board provided with two on board preset to adjust the voltage.

Dual Adjustable Regulated power supply 1.2V TO 37V DC – [Link]

Constant Current Sources

What are Constant Current Sources? Find out how they work and why they are useful. Try the circuit!: http://goo.gl/BRpqnD

Constant Current Sources [Link]

Projecta – Affordable & Faster PCB Prototyping Machine

A.Qadry @ Intelligent Minds tipped us with their latest project, a PCB prototyping machine. They are going to crowdfund the project soon so if you are find it cool you can follow them on their facebook page.

There are mainly two ways in talking about manufacturing, if you are going for a mass production by sure you will use photo-resist dry-films or you can use CNC engraving, Ink- transfer or even 3-D printing during prototyping but in this very first phase you need a fast & easy to use method to produce your prototypes and test your idea without expensive equipment, so that’s why we introduce this affordable machine to the market.

The creative idea we applied in Projecta is we cover the PCB board with any available metallic marker and the machine engraves the ink layer to produce a very high resolution image as resulted in photo-resist dry-films. We are going to a crowdfunding campaign for the mass production and wait your support!

Projecta – Affordable & Faster PCB Prototyping Machine – [Link]

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: