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I am doing a engineering project basis on jammer.. I need a adjustable range cell phone jammer circuit..? Answered

Cell phone jammer


The wave bubble project has a lot of schematics and ideas:


Not sure about adjustable range, but I'm sure you could disturb/limit the transmission power if need be. Ask a HAM geek if you're not one yourself. Keep in mind that cell jammers are illegal in tons of places, in many even to possess the device without using it.