Simple UPS Circuit For Cordless Phones

This circuit diagram of UPS is designed to use with a cordless telephones that cannot be operated during power failure. Since the ups is only meant for telephone, it's output power is limiter to 1.5W. This ups circuit is economical and can be assembled on a general purpose PCB.

Simple Electronic Fan Regulator Circuit Using Triac

The circuit diagram provided is a triac - diac electronic fan regulator that would reduce your power usage of electric fans even in slow speeds. A normal resistor-inductor fan regulator heats up to waste eneegy  when the fan is running with lowers speeds or it controls motor speed via applying resistance between fan and power supply.

TDA2030 Subwoofer Amplifier Circuit

This TDA2030 amplifier circuit is ideal for driving low frequency subwoofer speakers in home theater systems.The TDA2030 is a monolithic integrated circuit intended for use as a low frequency class AB amplifier.

LED Lighting Product Design

The performance of led's has improved so much over time that these tiny bulbs aare all set to brighten our home, offices, buildings, light up streets, use in LED projector mobile phones, and they get involved in our lives in very interesting ways. Goverments are challenging companies to come up with viable, sustainable, LED-based home lighting solution not only for saving energy also to increase our lighting standards. LED- based home lighting solutions are cheap enough to replace a 60W incandescent lamp. Eco-friendly, low power led lamps might be the biggest step we take towards saving this planet. 

Rain Sound Generator Using NE555

The circuit diagram shows a timer 555 based rain sound generator. The circuit requires a 9V dc power supply and can be fed from a 9V battery.  The loud speaker for producing sound is of 0.5W 8ohm speaker.The circuit will readily generate a rain like sound whenever the circuit fed by a 9V supply.

Motion Sensor For Security Light Using PIR BS1600

Here's the circuit diagram based on PIR motion sensor module BS1600 (or BS1700) that can be used for security lighting in power saving mode.(If you could not found  one in your local store ,  buy PIR motion sensor online).The special advantage of this motion detector circuit is it doesn't need any transformers in power supply section. The 12V DC required for feeding the motion sensor and driving relay is derived directly from the mains supply.

7 Segment Digital Clock Circuit Using IC 5314

This circuit diagram of digital clock uses six common anode seven segment displays  to show the time. It needs neither micro controllers or PIC for it's operation. It's a MM5314 IC driven digital clock operating at 50 Hz or 60 Hz, and 12 or 24 hour display format.It's very suitable for college mini projects.

Circuit Diagram of  7 Segment Digital Clock : Click  to enlarge