Rohde & Schwarz

What is a Phototransistor?

Multipage easy to read phototransistor (photo transistor) tutorial providing details about phototransistor its properties, how it works and how it is used.

Facts of the day

24 April 2014

History - It was on 24th April 1970 that the People's Republic of China launched its first satellite. Then on this day in 1981, IBM first introduced the personal computer or PC.

Quote - You cannot teach a man anything; you can only help him discover it in himself. - Galileo Galilei

The way things are - A computer program does what you tell it to do, not what you want it to do.


Spectrum Analyser Basics Tutorial

Essentials of the RF spectrum analyzer, what they are, the various forms of spectrum analyser, and what they are used for.


Wi-Fi 802.11 Channels & Frequencies

List of Wi-Fi / WLAN / 802.11 bands, their channel frequencies and bandwidth, 2.4 & 5 GHz allocations worldwide, & summary of which WiFi channels can be used together. news from

Dilbert from

Sensors, Actuators, and Their Interfaces: A Multidisciplinary Introduction
Sensors, Actuators, and Their Interfaces: A Multidisciplinary Introduction

Nathan Ida
Sensors and actuators are becoming increasingly important. While they had...
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