This App generates DTMF Tones of a 4x4 keypad and It can be usedinRobotics and Embedded Systems also . What is DTMF?Dual-tonemulti-frequency signaling (DTMF) is used fortelecommunicationsignaling over analog telephone lines in thevoice-frequency bandbetween telephone handsets and othercommunications devices and theswitching center. The version of DTMFthat is used in push-buttontelephones for tone dialing is known asTouch-Tone. How it Works?The DTMF keypad is laid out in a 4×4matrix in which each rowrepresents a low frequency and each columnrepresents a highfrequency. Pressing a single key sends asinusoidal tone for eachof the two frequencies. For example, thekey 1 produces asuperimposition of tones of 697 and 1209 hertz(Hz). Initialpushbutton designs employed levers, so that eachbutton activatedtwo contacts. The tones are decoded by theswitching center todetermine the keys pressed by the user.

Synopsis of DTMF decoder circuit project for electronicsengineering.

many people were looking for an app to controltheir bot using smartphone tones....so i have created this app... and in case any one wants source codefor this app...you can mail me at sapfubundy@gmail.com

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Bulan Ramadhan adalah bulan yang dinantikanoleh semua umat muslim di dunia. Syukur Alhamdulillah kita tinggaldi negara dengan mayoritas muslim sehingga bulan Ramadhan terasabegitu meriah dan menyenangkan. Apakah bulan Ramadhan hanya milikorang dewasa saja. Tentu saja tidak. Anak-anak pun sangat antusiasmenyambut bulan Ramadhan.Nah, bagaimana dengan buah hati anda yang masih balita?Bagaimanakah cara anda menjelaskan apa itu Bulan Ramadhan dankeutamaannya kepada sang buah hati? Mengenalkan bulan Ramadhankepada buah hati dengan cara yang menyenangkan sangatlah penting.Hal ini untuk menanamkan kepada anak-anak bahwa bulan Ramadhan itumenyenangkan.Kini telah hadir MARBEL PANDUAN PUASA RAMADHAN khusus untukanak-anak. Aplikasi ini mengajak anak-anak untuk belajar :1. Apa itu puasa?2. Apa saja keutamaan bulan Ramadhan?3. Apa saja rukun puasa?4. Apa saja amalan yang bisa dilakuakn di bulan Ramadhan?Marbel menggabungkan konsep belajar dan bermain menjadi satusehingga melahirkan cara belajar yang lebih menyenangkan. Materiakan disajikan dalam bentuk yang menarik dilengkapi dengan Gambar +Sound Narasi + Animasi untuk menarik minat anak-anak dalam belajar.Selanjutnya, mereka bisa mengasah kemampuan melalui permainanedukasi yang disediakan.Kelebihan :------------------Aplikasi ini dilengkapi dengan gambar dan ilustrasi serta animasiyang menarik, sehingga anak-anak akan merasa tertarik untukbelajar. Setiap materi dilengkapi dengan narasi pendukung. Aplikasiini dilengkapi juga dengan doa berbuka puasa, niat berpuasa sertaniat shalat tarawih lengkap dengan voice narasi, tulisan dalamhuruf arab dan latin, serta artinya dalam bahasa Indonesia.TENTANG MARBEL--------------------------------------------------Marbel adalah aplikasi pendidkan khusus untuk anak-anak usia 2 s/d8 tahun. Bersama Marbel, anak-anak bisa belajar banyak hal dengancara yang menyenangkan. Tersedia materi pembelajaran yang akanmembantu anak-anak dalam belajar mengenal sesuatu misalnya sajahuruf, angka, buah, sayur, hewat, alat-alat transpotasi, warna, danmasih banyak lainnya. Yang paling menarik dari marbel adalah :Permainan edukasi yang menyenangkan. Ada berbagai macam permainanyang akan menguji kemampuan mereka. Permainan itu terdiri dari :tepat cepat, ketangkasan, daya ingat, kecerdikan, asah otak danmasih banyak lainnya. Marbel dilengkapi dengan gambar dan animasiyang menarik, musik orisinil, serta narasi panduan yang bergunabagi anak-anak yang belum lancar membaca.Kami mengharapkan kritik dan saran dari anda, jangan ragu untukmengirimkannya ke :support@educastudio.comInformasi lebih lanjut mengenai Marbel:Website: www.educastudio.comFacebook: www.facebook.com/educastudioTwitter: @educastudioBagi bunda yang suka menemani anak-anak bermain, tak ada salahnyamencoba aplikasi Marbel. Anak-anak tak hanya mendapatkan kesenangandalam bermain, namun juga ilmu yang bermanfaat. Belajar sambilbermain..?? Kenapa tidak..?? Ayoo kita temani anak-anak belajar,bersama Marbel tentunya.. :)The month of Ramadan is amonth that is eagerly anticipated by all Muslims in the world.Praise to God we live in a country with a Muslim majority thatRamadan was so festive and fun. Is Ramadan belong only to adultsonly. Of course not. The children were very excited to welcome themonth of Ramadan.Well, what about your baby are still toddlers? How can you explainwhat it was the month of Ramadan and its primacy to the baby?Introduce the month of Ramadan to the baby in a fun way is veryimportant. It is to instill in children that Ramadan was fun.Now has come Marbel RAMADAN FAST GUIDE specifically for children.This application invites children to learn:1. What is fasting?2. What are the virtues of Ramadan?3. What are the pillars of fasting?4. What can dilakuakn deeds in Ramadan?Marbel combines the concept of learning and playing into one thatgave birth to a way of learning more enjoyable. The material willbe presented in an attractive form comes with Image + SoundNarrative + animations to attract children's interest in learning.Furthermore, they can hone skills through educational gamesprovided.Advantages :------------------The application comes with pictures and illustrations andinteresting animation, so the children will feel interested inlearning. Each material is equipped with a supporting narrative.This application is also equipped with a prayer iftar, theintention of fasting and of prayer tarawih complete with voicenarration, written in Arabic and Latin letters, as well as itsmeaning in Indonesian.ABOUT Marbel--------------------------------------------------Marbel is a special education application for children ages 2 s / d8 years. Together Marbel, children can learn a lot of things in afun way. 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Ayoo we accompany the children to learn, along Marbelcourse .. :)