Simple circuit to detect mobile phones

Cell phones typically send and receive signals in the frequency range 0.9 to 3GHz. This article provides a simple circuit that detects the presence of an activated mobile phone by detecting these signals.
The basic principle of the mobile phone detector circuit is to detect radio frequency signals. In Schottky diode circuits, Schottky semiconductors are used to detect mobile phone signals because of their unique properties of being able to correct low-frequency signals with low noise rates. When an inductor is placed near an RF signal source, it receives the signal through mutual inductance. This signal is rectified by a Schottky diode. This low-power signal can be amplified and used to power any indicator light, such as an LED in this case.

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ChipWhisperer - Automotive grade chip blasting equipment

ChipWhisperer is a complete open source tool chain launched by NewAE for side-channel power analysis and fault attacks. The tool chain includes hardware, host computer software, and hardware chip firmware, all open source on Github. This set of equipment is mainly dedicated to hardware security research.

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Power Profiler Kit II - Open source second-generation power measurement kit from Nordic

The Power Profiler Kit II (PPK2) is a stand-alone unit that, in addition to external hardware, can measure and optionally source current on all Nordic DK boards from sub-uA up to 1A.

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STM32 OpenSource Multimeter - an open source multimeter suitable for DIY entry

An open source multimeter design based on STM32F1/F3, with dual-range V/I, RMS measurement, continuity, component testing and other functions. The author has made all design files open source, which is very suitable for DIY entry.

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Full open source reverse "blasting" tool

Through this open source tool, everyone can better understand how program firmware is "exploded", thereby improving product security. Crack AES, crack RSA, crack DES and so on.

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Open source wearable watch (including firmware, schematics and 3D printing diagrams)

This smartwatch can measure linear acceleration, rotational speed, heart rate and SpO2 (oxygen saturation) of the hand

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FPGA-based Ethernet controller (MAC) source code

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AUTOSAR_Fee implementation source code

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Simple walking robot program source code

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usb keyboard and mouse dual use source code

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CAN bus FPGA development board schematic diagram

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Three-axis gimbal source code schematic software

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DIY simple obstacle avoidance car (with schematic and source code)

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Microcontroller hand-mounted fan C source code and schematic diagram.rar

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Electric vehicle control board mass production schematic PCB

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Remote video monitoring source code and schematic diagram based on STM32F4

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Agilent power supply schematic diagram

The complete circuit diagram can be used directly for circuit design reference. Simple CNC DC power supply, core power circuit part. Including AC and DC input parts, the pre-voltage regulation part is helpful for dispersing the heat of power devices; input and output protection, startup delay, communication functions; voltage control, current control, overvoltage and overcurrent protection;

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1200W switching power supply design schematic diagram and PCB design information

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PIC30v voltmeter schematic diagram

The 30v voltmeter made with PIC16f676 includes schematic diagram and source program.

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Smoke detector schematic and PCB source files and BOM

Smoke sensor design includes principle circuit design, PCB and BOM list

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