Circuit diagram for Interfacing SIM300 GSM modem to A89S52

SIM300 is an GSM modem which can be controlled through AT Commands. In this tutorial i am going to explain how to send/receive sms, how to make/receive a call, how to send a tweet to twitter using the SIM300 modem.I am going to use the sim300 modem with TTL output so it can be directly connected to the microcontroller ports.Sim300 needs a power supply of 3.4v to 4.5v, but the microcontroller circuit has only 5v supply. I am just using a Diode 1N4007 in series with the Vcc of the modem. So a 0.6v...

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Simple Battery Level Monitor Circuit on Ultimate EC 2013

This simple circuit can monitor the charging process in 12 Volt Lead Acid battery or Tubular battery. The status of LED indicates whether the battery is accepting charge or not. It also indicates the full charge condition. The circuit can be incorporated in any battery charger like 6 volt, 9 volt, 12 volt etc. The only change needed is replacement of the Zener ZD with appropriate value. That is for 6 volt charger , use 6.1 volt Zener and for 9 volt charger it should be 9.1 volt Zener.  Battery...

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Graphics Text For Facebook Chat and Message By Ultimate EC

Graphical Text For Facebook Chat by Ultimate EC 2013 ...

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Electronics & Communication Engineering Interview questions With Answers (Part-I)

Electronics & Communication Engineering  Interview questions With Answers Exclusive  on Ultimate EC http://snk.to/f-cu3wdf5k  only 170 kb (Link Updated) ...

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Quck Heal TS 2011 10000% workiing Crack by MahammadVasim Khatri Ultimate EC

THIS POST IS WILDCARD ENTRY FOR THIS BLOG           [password: Comment Below and Add as Friend  http://www.facebook.com/mahammadvasim.khatri]                             I MahammadVasim Khatri(Wangdu) has developed this software to To fix "Some DLLs ARE MISSING"  after Cracking Quick Heal TS 2011  (x86)  To use it Just Run File Quick Heal DLL FIXER.exe As Admin     ...

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Cellphone-Based Device Control With Voice Acknowledgement

Cellphone-Based Device Control With Voice Acknowledgement  Govani Hardik Here is a circuit that lets you operate your home appliances like lights and water pump from your office or any other remote place. So if you forgot to switch off the lights or other appliances while going out, it helps you to turn off the appliance with your cellphone. Your cellphone works as the remote control for your home appliances. You can control the desired appliance by pressing the corresponding key....

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Getting Started With Atmel Microcontroller : ATMEGA16 : Ultimate EC :~M.Vasim Khatri

Here is a Simple TuToRiAl to learn how to start using atmel microcontrollers   Will use atmega16 microcontroller in this Tutorial Here is a link for atmega16 datasheet : datasheet Total Nine(9) Presentation Are Give in RAR file: List of Presentations: Course contents 1- Introduction. 2-Memories in uc. 3-I/O ports. 4-External and Internal interrupts. 5-Timers. 6-clock sources and sleep modes. 7-reset sources and watch dog timer. 8-communication using SPI or USART. 9-dealing...

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