These devices have key drawbacks. Water level indicators require manual pump operation and often waste power as multiple LEDs ...

Building an Arduino speed detector using IR technology to measure the speed of a moving object is much more cost-effective, and it is also very simple to build. All you need are a few basic parts, ...

An Automatic Plant watering system is a device (or setup) that uses sensors to monitor the soil moisture and if the moisture ...

As this PIN is only known to you, your accountant (if not self-filing), and the IRS, it prevents scammers from filing a tax return using your Social Security Number and personal information.