20 Watt Inverter
This circuit will drive a 40 watt fluorescent or two 20-watt tubes in series. The transformer is wound on a ferrite rod 10mm dia and 8cm long. The wire diameters…
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A home to software testing, electronics circuits & projects, tips and tricks and digital diary.
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Lamp Dimmer
12v LAMP Dimmer Parts IC 1 – NE555 Transistor – 2N2955 -1 Resistance – 1k(2 no.), 100 Ω Variable Resistance – 50k Capacitor – 0.1 µF Diode – 1N4001 –…
LED Basics
Today LED has become an integral part of consumer electronics. LED TV, LED Display, LED Lights and so on. These are becoming very popular because of there low power consumption.…
How to remove windows default share?
Windows default share C$, D$ etc are recreated on machine restart or restarting the server service. To remove these share we can add a batch file which will remove the…
Saving perfmon data
If you are using perfmon tool in windows, you may sometime want to save the data for future analysis. To accomplish this you need to follow the following steps. …
MAC Address Spoofing
To change MAC-Address for a Network card in Windows Registry: Click Start – Run, type “regedit” Navigate to [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002BE10318] HKEY_LOCAL_MACHINE \SYSTEM \CurrentControlSet \Control \Class \{4D36E972-E325-11CE-BFC1-08002BE10318} 3. Under this key, you…
Load Testing using The Grinder
Introduction The Grinder is an open source load testing tool. The Grinder uses Jython scripts and the scripts are executed using agents which can be distributed over the network. Property…
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…
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…