Android tiled background
Learn how to create a simple tiled background for Android applications using Java code.
Author: Radu Motisan
Tube: 258-B Amperex rectifier
The Amperex 258-B is a half-wave Mercury-Vapor rectifier tube used in power supplies.
Tube: GP-5 (ГП-5)
The Svetlana GP-5 (ГП-5) is a glass-envelope beam power triode intended for use as a shunt regulator or pulse modulator in high-voltage systems.
Coil Winding machine counter with Atmega8 and Reed relay
A digital counter with a nice LCD display that supports both incrementing and decrementing. Good for various purposes, in this case as a display to a coil winding machine.
Developing for Blackberry 10
A short insight on how to get started with developing for the new Blackberry 10, using dynamically created controls.
Victoreen CDV-717 Remote Gamma Survey dosimeter
The CDV-717 is a very high-range gamma radiation ionization chamber detecting instrument, manufactured by Victoreen back in 1964.
CDV-742 Dosimeter and CDV-750 Dosimeter Charger
The CDV-750-5b Dosimeter Charger is a self contained battery-operated instrument.
Repairing a Victoreen CDV-700 6B Dosimeter
Fixing a CDV700 dosimeter can be difficult because original replacement components are not an easy find.
Tube: USN-5J29
5J29 is a split anode magnetron. This device is water cooled, the water flowing round the metal loop.
How to scale an Android UI on multiple screens
Learn how to scale an user interface to maintain the same aspect ratio, while running the same code on various Android devices.
Atmega8 and Nokia 5110 LCD
A C++ Library for AVR microcontrollers that allows easy connectivity to the Nokia 3110/5110 graphical LCDs.
Detecting an ultrasonic beacon
How to build an ultrasound beacon and the corresponding receiver.
Virtual Reality App Controls Real household objects
You can use your smartphone (android/iphone) to control electrical equipment inside your home. See how.
Dual H-Bridge for controlling two motors
Build a dual H-bridge board to control two motors.
How to set the AVR Fusebits
Learn how to set your atmega to work with various external crystals, program the fusebits, and build a fusebit doctor to revive your AVRs, in case you wrote the wrong settings .
NMEA GPS Library for AVR Microcontrollers
An open source library that allows you to use a NMEA GPS Module with an AVR Microcontroller. UART Communication and NMEA Parser is included.
ATMega128 and HD44780 LCD using 3 Wires with the 74HC164
Learn how to transform your HD44780 LCD into a easy to use, serial LCD, that you can connect to your microcontroller using only 3 wires! It’s time to save a few pins, and expand your project’s functionality!
Microscope photos: White and Blue Mold
White and blue mold as seen under the microscope, magnified up to 1000 (one thousand) times!
Building a robot – Make the robot follow you
Building an autonomous robot using a rover platform and advanced electronics is not an easy job. Kevin asked me to build a robot that would follow its user. A companion, very much like a robo-dog. See the project log here.
uRADMonitor – Unusual Background Radiation Reports – Explained
This page has been created to report unusual activity (radiation, temperature, humidity, luminosity, barometric pressure), as recorded by the uRADMonitor, including all the debug data to support the results. I cannot guarantee the measurement precision, I merely present the data recorded by the instruments.
Programmatically Injecting Events on Android – Part 2
A JNI Library for Android, to inject keys and touches but also listen for incoming input events to and from all applications, available as Open Source under GPL.
Top 10 Radioactive Electronic Tubes
Some of these tubes contain small quantities of Cesium-137, Cobalt-60, Radium-226, Krypton-85. The radioactive elements have been added to increase the electronic response by improving the internal ionization processes.
Digital Soldering station ZD937
A short review on my new Christmas gift, a neat digital soldering station, ZD 937, and a quick light installation that I did with LEDS, running directly on mains , 220V, using the ZD937.
DIY/Homemade Radiation Geiger Dosimeter
A digital dosimeter design that can be used with multiple geiger tubes, constructed around the atmega8 microcontroller and a 2×16 LCD. Equipped with a radio Bluetooth module for remote operation.
BMP085 Barometric pressure sensor
The BMP085 is a compact, low power sensor for reading temperature, barometric pressure and altitude. See it in use with Atmel microprocessors.
Temperature and Humidity sensor DHT-22
DHT-22 is a small size, compact, dual temperature and humidity sensor featuring one-wire connectivity.
HC-SR04 Sonar with Atmega8 microcontroller
Build an ultrasonic sonar for non-contact distance measurements, using an Atmega8 and a HC-SR04