DHT-22 is a small size, compact, dual temperature and humidity sensor featuring one-wire connectivity.
Build an ultrasonic sonar for non-contact distance measurements, using an Atmega8 and a HC-SR04
Locuiesc in Timisoara, si de curand am terminat o statie de monitorizare a nivelului de radiatii de fond. Cu exceptia catorva institute din tara, care rar dau publice graficele, statia mea e probabil singura alternativa de acest gen, accesibila utilizatorului obisnuit. Acest articol, redactat in romana, prezinta detalii asupra statiei, explica ce este radiatia de fond si cum apare ea, dar si ilustreaza grafice in timp real.
I’ve developed the uRADMonitor as an Environmental Radiation Surveillance automated monitoring device. Data is gathered in real time, 24/7, and is exported via the Internet to a database online. The data is available in customizable charts for analysis.
A story of making a DIY Digital Geiger counter circuit, that can be used with several tubes. Add an enc28j60 Ethernet module and use the data to create graphs available online!
Use the Atmega8 with two temperature sensors: the DS18B20 and the DHT-11. The latter also offers relative humidity data.
Vasil sent me 3 of his complete tesla coil systems. So here I am rebuilding his GU81m VTTC.
A Geiger Muller tube for Gamma radiation.
A TR Switch tube used in Radar technology, manufactured by Raytheon.
A sensitive photomultiplier tube, used in scintillation detectors.
A klystron capable of up to 6000MHz
Read a post on my new acquisition, a Bauch&Lomb compound binocular microscope, a high quality tool, put to some good use to capture a few micro photographs. It can get up to 1000X with its current optics.
Learn how to create a network interface for your microcontroller projects. Here I have shown an example using the Atmega8 and the enc28j60 . Build a simple Webserver to show sensor data such as temperature or humidity.
Learn how to create a mouse cursor in Android OS programatically, using Overlay Views.
Find the default orientation on Android devices, and intercept orientation changes even for activities locked in portrait or landscape mode.
Learn how to use the BluetoothManager private APIs on iOS / iPhone/ iPod to discover nearby connections, populate a list view with the results, and try to establish a Bluetooth connection to the remote devices.
A short guide to get started with iOS development. How to build a simple list view.
A DIY microspot soldering/welding/cutting device using energy stored in a very large capacitor delivered as precisely calculated pulses to working electrodes.
A short review on a Mac Mini that I recently acquired. I plan to use it as my new fixed workstation instead of my older P4 PC.
For my first oscilloscope, I opted for the Atten ADS1102CAL. A few months after, I could say I’m extremely happy choosing this robust device, that does an excellent job on my workbench.
The laser keyboards use laser and infra-red technology to create the virtual keyboard and to project the hologram of a keyboard on a flat surface.
A digital pen solution for Android OS.
A good source for cheap AVR USB Programmers. USBasp modules.
Several simple SMPS designs, constructed by Daniel, @danyk.wz.cz . A great resource to learn about various SMPS topologies.
Three possible solutions for injecting events (both keys or touch events) in Android.
A quick CCD replacement for my Canon S2 IS camera. CCD IR filter removed to enable IR photography options.
How to fix the problem with Float variables in AVR Studio
The device consists of a hot cathode (filaments), anodes (phosphor) and grids encased in a glass envelope under a high vacuum condition. The cathode is made up of fine tungsten wires, coated by alkaline earth metal oxides, which emit electrons when heated by an electric current.
SBT-10A, a rare geiger muller tube for professional equipment.
Build C++ projects with AVR Studio 5