GSM/GPRS/GPS Shield(B) ব্যবহার পদ্ধতি(পর্ব-১: জিপিএস ডেটা রিভিভ করা)
Sending SMS with SIM808 GSM/GPRS/GPS Shield.
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DIY-Audio Amplifier | অডিও অ্যাম্পলিফায়ার
Make an audio amplifier with LM386,resistors,capacitors, speaker, audio jack and battery. Gain of this amplifier is 20.
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DIY-Wireless calling bell | ওয়্যারলেস কলিং বেল
Wireless calling bell made with RF transmiter and receiver module pair, HT12E and HT12D encoder-decoder Remote controlled calling bells are made this way.
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