Glen Chenier @ edn.com wanted to find out the characteristics of an unknown diode to be able to replace it with an equivalent one so he decided to make some measurements using his test equipment. In this article he show us how to measure the junction capacitance, Cj, and reverse...

Researchers at the University of Wisconsin-Madison have revealed a unique phototransistor that is flexible and faster and more responsive than any similar phototransistor. The innovative phototransistor could improve the performance of myriad products -- ranging from digital...

This is an Arduino powered Weather Station Project that can run on batteries for almost a year! In order to achieve that we use a bare ATMEGA328 chip along with some accurate sensors. We use the DHT22 temperature and humidity sensor, a BMP180 barometric pressure sensor, a BH1750 light...

Here is a PDF document written by D. Grover, explaining how to understand a manufacturer's datasheet. It goes through the 555 timer IC datasheet and gives an explanation on various parts. How to Read a Datasheet -...

This tutorial will guide you through the process of installing an FTP server on Raspberry Pi. Check it out: For uploading files on a Raspberry Pi you should install a FTP server. Such a server is very useful if you use your Pi as a web server or even if you want to have a network...

The project designed around L293D IC. The L293D device is quadruple high-current half-H driver. The 293D is designed to provide bidirectional drive current up to 600mA a voltage from 5V to 36V. L293D Adapter Board can be used as dual DC motor driver or bipolar stepper motor driver....

This is a great ATtiny85 watch that uses a SSD1306 OLED display and is powered by a CR1220 battery. Today core subject, ATtiny85. Someone suggest me to use SOIC version to reduce the watch size and I found the coin cell mAh calculation method will count the battery voltage down to...

Sergey @ malinov.com has build another FTDI FT231X based USB to Serial adapter and provides the design files to the public domain. This adapter allows connecting micro-controller boards that have 5V or 3.3V serial interfaces to a PC USB port. The converter is compatible with FTDI...