corrected old post

Here are some old post which i have corrected now and also added some extra content in it.
do tell us if you find any broken links while surfing our site

1. 4G networks
2. Mini UPS
3. Anti sleep alarm
4. Weekly Reminder
5. Cell Phone Jammer
6. How to overcome stage fear
7. USB socket
8. Dancing LED
9. Invisible broken wire Detector
10. Electronic Candles
11. Electronic Stop watch
12. Pyroelectric Fire alarm
13. Alarm circuit
14. Temperature Controller 
15. Wireless Switch
16. Remote operated Master Switch
17. Car Reversing Horn
18. Quiz Table
19. Rain Sound effect Generator 
20. Ethical Hacking

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