Light from a mobile phone's display screen could be used to trigger a switch. When a brief (free) phone call illuminates the d...
Home / Posts filed under Phone
Showing posts with label Phone. Show all posts
Showing posts with label Phone. Show all posts
Cell Phone Detector
This is a mobile phone sniffer circuit that can detect the signals being used in the GSM (Global System for Mobile Communication) band...
Use old phones as an intercom
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The explained circuit in this article is probably the simplest and the cheapest, since it employs minimum number of components and the m...
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The ZN414 is a low cost, single-chip AM radio integrated circuit. Launched in 1972, the part was designed and supplied by Ferranti. The ZN...
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It is a very simply 220 V or 110 V operated 1 watt LED driver circuit, that would cost you not more 1/2 a dollar, excluding the LED o...
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Graphic Equalisers are a must in any good hi-fi systems! They enable you to shape the response of the system to the particular room, ...
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This circuit will turn on an AC Bulb when the sun sets, the working of the circuit is simple and the heart of this circuit is an LDR (Lig...
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