LED driver schematics

Build a long-lasting night lamp circuit using a 1.5V cell and voltage doubler to power a bright LED. Extend battery life up to 6 months with an optional photoresistor for automatic daylight shutoff, potentially tripling run time.... [read more]

Build stunning, high-intensity lighting solutions with this innovative LED circuit, delivering light equivalent to a 35W bulb! This meticulously designed circuit, costing between Rs 200 and Rs 400, utilizes a robust design with surge protection and flicker-free illumination, perfect for illuminating VU and SWR meters.... [read more]

Build a dynamic appliance control circuit with red and green LEDs, instantly monitoring power status. This innovative design illuminates a red LED when your appliance is active and a green LED when it’s off, providing immediate visual feedback. Easily integrate this circuit into your projects using components like a BC337 transistor, 1N4007 diodes, and a SPST mains switch. Unlock powerful control and monitoring capabilities for your next electrical project.... [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]

Transform your PC enclosure with this innovative circuit, enabling clear visual indication of both IDE and SCSI disk activity. Build a robust, multicolour LED solution that simplifies drive monitoring and enhances your system’s performance.... [read more]

Build a robust LED circuit for mains power indication or safety lighting, operating from 100-240VAC. This innovative design utilizes a special X2 capacitor and includes a 1M resistor for reliable current limiting. Perfect for stairs, corridors, and other pilot lamp applications.... [read more]

Build a reliable emergency light with this innovative circuit, featuring a powerful 6.8V battery and 12 white LEDs. This automatic light turns on during power outages, providing critical illumination, and features a 9V charger powered by a 9Vac transformer.... [read more]

Build a powerful LED torch with up to one month of continuous service from just 4 AA batteries. This innovative circuit, utilizing a 7555 timer, achieves 80 times longer battery life than traditional torches, illuminating pathways with a focused 400 mcd beam and adaptable voltage options for optimal performance.... [read more]

Build your own chime doorbell circuit with this easy schematic and discover how a 22 ohm resistor extends battery life while providing a reliable visual indicator, perfect for tracking doorbell presses and boosting your security system.... [read more]

Design a stunning 25-LED circuit with a peak voltage of 170V, unlocking your creative potential for innovative lighting solutions. This detailed guide reveals the precise resistor value – 2.4K – and power rating – 0.96W – needed to maximize your LED performance and achieve a powerful, efficient 71% duty cycle. Build this circuit and illuminate your projects with confidence!... [read more]

Power a LED from 120V AC with this innovative circuit, achieving a safe 5V output with minimal ripple. Learn to control LED current and build a robust, low-power AC-to-DC converter for exciting projects.... [read more]