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Uncover the hidden integrity of your printed circuit boards with this simple schematic. Detect 0V, voltages from 3V to 30V, and floating components using LEDs and a FET constant-current generator. Build your diagnostic tool and gain confidence in your board’s functionality.... [read more]

Build a smart refrigerator alarm to prevent food spoilage and save energy. This innovative project uses a light-dependent resistor to detect open doors, alerting you before costly energy waste and food loss. Secure your kitchen and boost your efficiency with this practical DIY solution.... [read more]

Design a robust and versatile DC power supply capable of delivering up to 3A, ideal for prototyping and powering your electronic projects. This adjustable power supply offers a stable 3 to 30V output, perfect for experiments and builds.... [read more]

Build your innovative automatic LED lamp with the PR4403 – a powerful 40mA LED driver now featuring an intelligent LS input. Harness solar energy, monitor light levels, and create a self-adjusting illumination system. This circuit, utilizing a single 1.2V cell, seamlessly integrates a solar module for charging and a light sensor, activating your LED when darkness falls. Discover the potential of 100µA power consumption during daylight, and fine-tune your system with a threshold resistor for optimal evening activation.... [read more]

Build precise electronic circuits with this low-resistance continuity tester, ideal for checking soldered joints and connections with a 0.25-4 ohm range. Unlock optimal performance and illuminate your projects with this powerful diagnostic tool.... [read more]

Build your own ingenious firecracker triggering system with this detailed schematic! This innovative circuit utilizes a remote control to ignite firecrackers safely from a distance, enabling you to control the burst with precision. Discover how a 12V battery and a custom circuit, including an IR receiver and LEDs, create a powerful and reliable ignition system – perfect for ambitious projects and thrilling experimentation.... [read more]