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Build your ultimate security system with this simple transistor-based burglar alarm. Featuring automatic Exit and Entry delays, a timed Bell Cut-off, and a system Reset, this 30-second alarm empowers you to protect your property. Expand your defense with a modular design, adding as many as you like – perfect for buildings requiring up to four zones.... [read more]

Unlock extended range IR communication with this circuit design, boosting signal power fourfold and utilizing a laser pointer for maximum reach. This innovative design, featuring an IR laser and a 38 kHz frequency modulator, delivers a powerful, directed beam for reliable communication, perfect for building your own advanced remote controls.... [read more]

Build a captivating Halloween badge circuit that brings sound to life! This innovative project uses a microphone and two LEDs to create a mesmerizing visual effect, mimicking the eyes of a spooky character. With components like a 10K resistor, BC547 and BC557 transistors, and a small electret microphone, you can craft a truly unique and engaging Halloween accessory. Unleash your creativity and build a circuit that reacts to sound, illuminating your badge with spooky brilliance.... [read more]

Build your own electronic die and unlock unpredictable results with this innovative circuit! Featuring a 4060 digital counter, this project delivers a truly random dice roll, ensuring no more biased outcomes. Create a captivating display of seven LEDs, designed to mimic the classic die, and experience the thrill of instant, unpredictable results.... [read more]

Build a smart parking system with this innovative circuit. Trigger alerts with LEDs, indicating distances from 6cm to 20cm. This circuit, utilizing an infra-red level detector, provides visual feedback for precise parking assistance, adaptable for various applications.... [read more]

Build a powerful, high-efficiency oscillator circuit using a complementary transistor pair to drive your loudspeaker. This innovative design, featuring 200mA output, allows you to create a sustained, steady tone by charging a capacitor, unlocking a world of sonic possibilities.... [read more]