بسم الله الرحمن الرحيم
أقدم لكم هذه المجموعة من دوائر التحكم المختلفة
تحكم بالأضواء حسب التصفيق
Clap Activated Remote
من الموقع
http://www.kingsolder.com/circuit/cl...te_989_153.asp
http://upload.qariya.info/images/qariya-c35ae8dc4e.gif
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انذار لا سلكي لمنع السرقة
anti- theft wireless alarm
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التحكم في أربعة مفاتيح بواسطة راديو أف أم
Radio Remote Control
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دائرة لا سلكية للتحكم عن بعد
(remote control based on PIC (radio transmitter
المستقبل
http://upload.qariya.info/images/qariya-7e07a4ce7e.png
وفي نفس الموقع استخدام IR لاً من RF
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27MHz TRANSMITTER
The transmitter is a very simple crystal oscillator. The heart of the circuit is the tuned circuit consisting of the primary of the transformer and a 10p capacitor. The frequency is adjusted by a ferrite slug in the centre of the coil until it is exactly the same as the crystal. The transistor is configured as a common emitter amplifier. It has a 390R on the emitter for biasing purposes and prevents a high current passing through the transistor as the resistance of the transformer is very low.
The "pi" network matches the antenna to the output of the circuit. See full description in 27MHz Links article.
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27MHz RECEIVER
The 27MHz receiver is really a transmitter. It's a very weak transmitter and delivers a low level signal to the surroundings via the antenna. When another signal (from the transmitter) comes in contact with the transmission from the receiver it creates an interference pattern that reflects down the antenna and into the first stage of the receiver.
The receiver is a super-regenerative design. It is self-oscillating (or already oscillating) and makes it very sensitive to nearby signals. See full description in 27MHz Links article.
اتبع الرابط
http://talkingelectronics.com/projec...200TrCcts.html
Homebrew RF Circuit Design Ideas
مجموعة من دوائر التحكم اللاسلكية
