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High Voltage Power supply – 140KV
Posted inHardware High Voltage

High Voltage Power supply – 140KV

Posted by By Radu Motisan March 26, 2011
A CW High voltage supply that produces up to 140000 volts (140KV) . Simple, clean design, without oil, but with high quality multipliers.
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Homemade Flyback secondary -3-
Posted inHardware High Voltage

Homemade Flyback secondary -3-

Posted by By Radu Motisan March 26, 2011
Build a disc shaped flyback secondary. A robust new design, that will do a great job in your High Voltage projects.
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DIY/Homemade Geiger Muller Clicker V1
Posted inElectronics Hardware Nuclear

DIY/Homemade Geiger Muller Clicker V1

Posted by By Radu Motisan March 21, 2011
An article presenting a simple DIY Geiger Muller counter using the Russian tube SI-22G and a single transistor regulated inverter that puts out 400V, as required by the tube. A very basic detector assembled in 5 minutes. See an operation comparison to the Radex RD1706.
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Android overriding Menu key to disable keyboard popup
Posted inAndroid Software

Android overriding Menu key to disable keyboard popup

Posted by By Radu Motisan March 19, 2011
The standard functionality on Android devices makes the software keyboard popup every time the Menu is long pressed. This may be annoying or unwanted. Here's how to disable it.
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Android 9 Patch images for custom controls
Posted inAndroid Software

Android 9 Patch images for custom controls

Posted by By Radu Motisan March 19, 2011
Design custom shaped corners Edittexts or TextViews, or any other kind of Android interface controls, using 9 patch images that keep their aspect when stretched.
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Android Contacts – a simple Contact Selector
Posted inAndroid Software

Android Contacts – a simple Contact Selector

Posted by By Radu Motisan March 19, 2011
The Android Contacts tutorial part 5, here I show a robust solution for selecting a contact from a list. A filter/search mechanism is also implemented using the SimpleCursorAdapter.
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Android Contacts – Searching for contacts
Posted inAndroid Software

Android Contacts – Searching for contacts

Posted by By Radu Motisan March 19, 2011
Part 4 of Android Contacts tutorial presents an easy way to programatically search and retrieve a contact and all the fields we are interested in such as Phone, Email, Web, Company, Address, etc.
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Android Contacts – Invoke the Edit Contact Intent
Posted inAndroid Software

Android Contacts – Invoke the Edit Contact Intent

Posted by By Radu Motisan March 19, 2011
In Android Contacts tutorial part 3, I present a simple way of opening a contact in the System contact form using the ACTION_EDIT Intent .
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Android Contacts – Custom Contact column to get the LOOKUPKEY
Posted inAndroid Software

Android Contacts – Custom Contact column to get the LOOKUPKEY

Posted by By Radu Motisan March 19, 2011
Part 2 of the Android Contacts tutorial, showing how to add a custom column to a contact, and how to use that to identify a newly added contact and read its LOOKUPKEY.
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Android Contacts – Add a new Contact using ContentProvider
Posted inAndroid Software

Android Contacts – Add a new Contact using ContentProvider

Posted by By Radu Motisan March 19, 2011
Part 1 of a tutorial on working with Android Contacts: add a new contact programatically, including name, email, company, phone but also a thumbnail contact image .
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Android WebBrowser using WebView
Posted inAndroid Software

Android WebBrowser using WebView

Posted by By Radu Motisan March 18, 2011
A few easy steps for an Internet Web Browser for Android. Learn how to use a Webview, load pages, inject Javascript, read the HTML source code and more.
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Android GUI with Header+Scrollable Content+Footer
Posted inAndroid Software

Android GUI with Header+Scrollable Content+Footer

Posted by By Radu Motisan March 18, 2011
Create an Android GUI with Header, middle scrollable content, and a footer.
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Thyratrons
Posted inElectronics Hardware High Voltage Tubes

Thyratrons

Posted by By Radu Motisan March 17, 2011
An article on Thyratrons and a film showing three energized tubes : the 714, the 309/FG17 and the ELC1B.
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Simple DIY Induction heater
Posted inElectronics Hardware

Simple DIY Induction heater

Posted by By Radu Motisan March 2, 2011
A Royer oscillator with 2 IRF540 N-Channel mosfets, a 0.47uF Capacitor and a 1500uH inductor used for an induction heater. The mosfets remain cool, even with such small heatsinks.
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Android PhotoPicker using Intents and Gallery
Posted inAndroid Software

Android PhotoPicker using Intents and Gallery

Posted by By Radu Motisan February 2, 2011
Learn how to Invoke the Android Gallery Intent to pick a photo and get the path in your application. This photo picker returns the image path directly in your application.
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Android Custom Complex Listview with Header (no XML)
Posted inAndroid Software

Android Custom Complex Listview with Header (no XML)

Posted by By Radu Motisan February 1, 2011
Create a dynamic (no XML) listview with header with all the bells and whistles. Learn how to use the item position to change its background and content for a complex result.
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Android Unique Device ID
Posted inAndroid Security Software

Android Unique Device ID

Posted by By Radu Motisan February 1, 2011
Learn to read an unique device ID from your Android phone or tablet. Use the ID to generate software security keys or for cryptography applications.
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Developing for Android – the SDK – update 2011
Posted inAndroid Software

Developing for Android – the SDK – update 2011

Posted by By Radu Motisan February 1, 2011
Get started with Android Java development – a tutorial with detailed steps and lots of pictures to help you make your first android application. Use Eclipse and the Android SDK.
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Posted inHardware High Voltage

A Farnsworth–Hirsch Fusor failed attempt

Posted by By Radu Motisan January 7, 2011
My first attempt in building an inertial electrostatic confinement device . It didn't work.
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Android Vertical TextView / Custom Angle Text
Posted inAndroid Software

Android Vertical TextView / Custom Angle Text

Posted by By Radu Motisan December 15, 2010
Learn how to create a Custom TextView class that can draw vertical text or rotate the text to any given angle. Easy!
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Multitester using ATMega8 and HD44780 LCD
Posted inElectronics Hardware

Multitester using ATMega8 and HD44780 LCD

Posted by By Radu Motisan December 12, 2010
An Atmega8 multimeter that can measure Transistors: Bipolar/Mosfet , Diodes and Double Diodes , Resistors, Capacitors: between 0.2nF to 7300μF, Triacs and Thyristors.
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Ion thruster using 50KV Supply
Posted inHardware High Voltage

Ion thruster using 50KV Supply

Posted by By Radu Motisan December 1, 2010
Build a Ion Thruster using light materials and power it using a 50KV supply to see another kind of propulsion.
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Homemade/DIY High voltage probe
Posted inHardware High Voltage

Homemade/DIY High voltage probe

Posted by By Radu Motisan November 29, 2010
Using a high voltage 1GOhm resistor to built a DIY high voltage probe, to measure voltages up to 55KV with a normal multimeter, by scaling the voltage down by 1/1000.
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Posted inHardware High Voltage Nuclear Optics

X-ray intensifying screen

Posted by By Radu Motisan November 29, 2010
Get X-ray intensifying/fluorescent screens from X-ray cassettes used for radiography.
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NaI Scintillation Probe and Gamma Spectroscopy
Posted inElectronics Hardware High Voltage Nuclear Optics

NaI Scintillation Probe and Gamma Spectroscopy

Posted by By Radu Motisan November 29, 2010
A scintillation probe enclosing the regulated high voltage supply, the signal amplifier, the photomultiplier and the scintillation crystal (NaI). Building a DIY counter for a NaI Scintillation probe. AtMega8 and a bluetooth module for wireless data output. A cheap and easy to build homemade dosimeter with applications in spectroscopy.
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High Current Inverter using ZVS
Posted inElectronics Hardware High Voltage

High Current Inverter using ZVS

Posted by By Radu Motisan November 29, 2010
Use a ZVS Driver as an invertor for a high current supply.
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We’ve got a new design!
Posted inReviews

We’ve got a new design!

Posted by By Radu Motisan November 26, 2010
The new PocketMagic.net logo and layout
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Marx Generator 200KV discharge – artificial lightning
Posted inElectronics Hardware High Voltage

Marx Generator 200KV discharge – artificial lightning

Posted by By Radu Motisan November 25, 2010
See a 200.000 Marx generator in action. 20cm discharges!
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Android on HD2 (HTC Leo) INSTALL_FAILED_INSUFFICIENT_STORAGE
Posted inAndroid Software

Android on HD2 (HTC Leo) INSTALL_FAILED_INSUFFICIENT_STORAGE

Posted by By Radu Motisan November 22, 2010
You can boot an Android image, from the SDCard of an Windows Mobile HTC HD2 Pocket PC, using Haret. Be careful to use a 2GB max SDCard!
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High Voltage Power supply – 50KV
Posted inElectronics Hardware High Voltage

High Voltage Power supply – 50KV

Posted by By Radu Motisan November 21, 2010
My homemade high voltage power supply that can provide aprox. 50KV for 12V in.
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