Christmas Tree lighting circuit

Christmas is just around the corner and its time to decorate our home with attractive lighting and other stuffs. The above given electronic design may help you to make a personalized Christmas tree lighting by your own. This circuit uses simple IC 555 and Dual flip flop IC to generate various frequency signals and use those signals to lit the LED's in a pattern. This will give a beautiful lighting effect. Also the cost of building this simple circuit is pretty low.

Vertical Image flip using CSS and HTML

Image flipping hover effects can be very useful where we need to display dual images about a specific theme or product in a single spot. This effect can be implemented very easily using simple CSS and HTML. You can view the demo of this vertical flip effect in the below link.

Universal Liquid level indicator with pump control

Liquid level indicator circuits are highly useful to monitor the level of liquids present in a tanks where access to the tanks are difficult. This circuit uses pressure sensor to sense the level of liquid in the tank which eliminates the drawbacks such as: corrosion of the sensing electrodes, ionic conduction property of liquid etc., which were used in the primitive liquid level indicator circuits. Also  the alarm in this circuit offers the added advantage of alerting the user to turn OFF the liquid pump or valve.