Making a cell mobile phone detector
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The aim of this project was to design a mobile phone detector. A circuit was designed using operational amplifier, resistors, capacitors, transistors, led diode, bread board and battery.it was then used to detect cell phone signals in the range of 0.9GHz to 3GHz and a radius of one and a half metres while in usage during phone call and short messaging services. The results were positive with in that range.