Regulated DC Power Supply Circuit
Below is the regulated DC power supply( 12, 8, 5 v) circuit. This circuit can be customized by adding 9v and 6v voltage regulator. Also, the 4 diodes can be replaced…
A home to software testing, electronics circuits & projects, tips and tricks and digital diary.
A home to software testing, electronics circuits & projects, tips and tricks and digital diary.
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Basic Power Supply Circuits – Part 2
Simplest DC power supply circuit using 78XX is shown below. Parts D1, D2, D3, D4 – 1N4007 IC1 – 7812 IC2 – 7805 C1 – 1000 mf C2 – 330…
Basic Power supply circuits Part 1
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…
Importance of Latency and Bandwidth in Web response time
The six parameters of Web response time are listed below: Page size: Page size is measured in Kbytes, and on the surface, the impact of this variable is pretty obvious:…
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Truth About Test Plan Documents – 98% of test plan documents that are created are not updated, maintained or cared beyond sign off. – The first 5 pages of a…
Linux Tips – How to close a program that has frozen
Although Linux is a really stable platform, there will be some times that a program will freeze. In those cases most people are stuck on what to do. Generally you…
Security Testing – What is 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…
Fundamentals of testing – Why is testing necessary?
Why is testing necessary? Testing is necessary because we all make mistakes. Some of those mistakes are unimportant, but some of them are expensive or dangerous. We need to check…
Basic Electronics – 2
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…