Detecting an ultrasonic beacon
How to build an ultrasound beacon and the corresponding receiver.
Electronics
Microcontrollers, smart devices, sensors, everything related to today’s electronic technology.
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!
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.
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.
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
Statie de monitorizare a radiatiei de fond in Timisoara
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.
uRADMonitor – Online Radiation monitoring station
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.
DIY/Homemade Geiger Muller Digital Counter V3
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!
Temperature Sensors DS18B20 and DHT11 with Atmega8
Use the Atmega8 with two temperature sensors: the DS18B20 and the DHT-11. The latter also offers relative humidity data.
Vacuum tube tesla coil (VTTC) using Russian GU-81m
Vasil sent me 3 of his complete tesla coil systems. So here I am rebuilding his GU81m VTTC.
Atmega8 and enc28J60 for ethernet support
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.
Capacitor Discharge Microspot Welder / Cutter
A DIY microspot soldering/welding/cutting device using energy stored in a very large capacitor delivered as precisely calculated pulses to working electrodes.
Projection keyboard
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.
USBAsp – AVR USB Programmer
A good source for cheap AVR USB Programmers. USBasp modules.
Simple Switched power Supplies
Several simple SMPS designs, constructed by Daniel, @danyk.wz.cz . A great resource to learn about various SMPS topologies.
Canon S2 IS CCD Repair and IR Mod
A quick CCD replacement for my Canon S2 IS camera. CCD IR filter removed to enable IR photography options.
AVR Studio 5 snprintf / vsnprintf problem with Floats
How to fix the problem with Float variables in AVR Studio
DIY/Homemade Geiger Muller Clicker V2
This geiger counter circuit features a regulated high voltage supply, with adjustable output. It can run on a single AA battery (1.5V)
Digital Counter using CD4026
A digital counter using CD4026 for fast event counting as those from Geiger Muller tubes or scintillation probes.
How to build a Tesla Coil #4
A small spark gap tesla coil, a good example for an relaxation oscillator.
Rewind a Microwave Oven Transformer
How to rewind a MOT transformer for a high current low voltage power supply.