Electronics

Basic Power supply circuits Part 1

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To understand power supply circuits, we need to understand rectifiers. A rectifier converts AC or alternating current to DC direct current. Rectifiers are used in Power supply circuits which we will discuss in detail. The process of converting AC to DC is called Rectification. Half wave rectification. It requires only single diode. Only positive cycle […]

Software Testing

Security Testing – What is Security testing?

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What is Security testing? Security testing is a process to determine that an information system protects data and maintains functionality as intended. It is the process that determines that confidential data stays confidential and users can perform only those tasks that they are authorized to perform. Security testing covers confidentiality, integrity, authentication, availability, authorization and […]

Electronics

Basic Electronics – 2

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Passive Components RESISTORS To oppose the flow of electrons ( current). The symbols are shown below. Resistance is measured in units called “Ohm”. 1000 ohms is shown as 1k ohm (103 ohm) and 1000 k ohm is shown as M.ohms (106ohm). Resistors can be broadly of two types. • Fixed Resistors and Variable Resistors. Fixed […]

Software Testing

Security Testing

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Security Testing What is Security testing? Security testing is a process to determine that an information system protects data and maintains functionality as intended. It is the process that determines that confidential data stays confidential and users can perform only those tasks that they are authorized to perform. Security testing covers confidentiality, integrity, authentication, availability, […]

Electronics

Basic Electronics – 1

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Introduction Electronic component can be divided into 2 types: Active and Passive components Resistors and Capacitors etc. are known as passive components because they can only attenuate the electrical voltage and signals and cannot amplify. Devices like transistors and operational amplifier(op Amps)can amplify or increase the amplitude and energy associated with the signals and so are […]