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Some time I have uploaded some image files to my server to include them into my post or page, but I never use or forgot to include them and especially these image files are not deleted after your a post or page deleted.Actually,I can delete these unused image files via any FTP client software.But , I must check every image files to determine it is used or unused image files and it is waste of my time.So I’ve created my first WordPress Plugin called DUI(Delete Unused Image).It may not the best plugin but it works on my website. Read more

Yesterday I want to send a message to my friend’s computer on my network(home network behind a router) without install a new special software.After do some search on the Internet I found a “net send” command which included in Windows 95, Windows 98, Windows Me, Windows NT, Windows 2000, Windows XP and Windows 2003.Net send command is a command line interface that pop-up a message in a simple Message box on your friend’s computer like the bottom picture.

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Firmware v1.0
Hi-tech PICC source code
This is a PIC based water level detector.Why I choose PIC ? First I have a lot of them for my DIY projects,second I want to use this project with 4.5V batteries and PIC Micro has the sleep mode which has very low power consumption,so the life of the battery can be extended.Most of time of this circuit operates in the sleep mode and wake-up from sleep through watchdog time-out every about 2 second. Read more

How to create screenshot with Media Player Classic ?My friend asked me about how to create screenshot without special software.Actually, If you have Media Player Classic installed in your computer it easy to create screenshot like the below image.

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