4-level LED lamp display power, not working state intelligent automatic shutdown;
The built-in lithium battery protection IC, over-current, overpressure, under-voltage protection;
Dual USB output ports.

The TDA2030 IC is a powerful audio amplifier IC able to deliver up to 20W of output power, so you can use it to run a 4Ω speaker at 12W or a 8Ω speaker at 8W.

We are going to build a water level indicator circuit using 555 timer IC. This is a useful project which detects the water level and gives a signal to the user indicating that the water has reached the desired level.

In this project we use Triac (Triode AC Switch) to control the brightness of the AC bulb with a IR TV Remote. You can also control Fan speed with your TV remote using this Triac Dimmer circuit.

A Panic Alarm Circuit is used to send an emergency signal immediately to the people in nearby location to call for help or to alert them. The possible panic situation can be any, it is not restricted to few situations.

A binary clock is hardly a new idea, but this particular concept is something I haven’t seen anywhere else. And it was idling in the back of my mind for over a decade before finally seeing a working prototype.

Dancing LED lights which dances to the tune of any music playing....

It is going to be the heart of any party and liven up your room and outdoors...

As simple as plugging the music from your favorite music player/ipod/stereo and the lights start blinking with the music...

IR sensor is very popular sensor, which is frequently used in many applications in electronics, like it is used in Remote control system, motion detector, Product counter, Line follower Robots, Alarms etc. We have already covered complete working of IR sensor here in this article: IR Sensor Module Circuit. IR Sensor basically consists a IR LED and a Photodiode.

We have built a Volume Meter or VU meter, with the help of MIC, OP-AMP and LM3914, which glows the LEDs as per strength of the sound, if sound is low, lesser LEDs will glow, and if sound is High more LEDs will glow, check the Video at the end. VU meter also serves as a volume measurement device.

Emergency light is an integral part of household electronics nowadays. We all know Emergency light is used during the power failure to light up the home. As it is used during the power failure, it should last long, hence generally bright white LEDs are used in emergency light, because they produce more light and consume less power.