HiBit

MongoDB is a popular open source and document oriented database system. It belongs to a family of databases called NoSQL, which is different from the traditional table based SQL databases. It makes use of collections, each having multiple documents, and allows the user to store data in a non relational format. Data is stored in flexible, JSON-like documents where fields can vary from document to document. That's the reason for calling it schemaless database.

MPU-9250 is one of the most advanced combined accelerometer, gyroscope and compass small size sensors currently available. It replaces the popular MPU-9150 lowering the power consumption, improving gyro noise and compass full scale range performance. It has many advanced features, including low pass filtering, motion detection and even a programmable specialized processor.

Modern web frameworks take one group of related concepts and split it across multiple places throughout your codebase. Laravel provides a very clear structure with large variety of tools to make the development easier and faster. Along with the huge community it makes Laravel a great option for most starting projects.

Arduino is an open-source electronics platform based on easy-to-use hardware and software. Arduino boards are able to read inputs - light on a sensor, a finger on a button, or a Twitter message - and turn it into an output - activating a motor, turning on an LED, publishing something online. You can tell your board what to do by sending a set of instructions to the microcontroller on the board. To do so you use the Arduino programming language and the Arduino Software (IDE).

Historically a lot of software has used incrementing numbers to represent the identifier of a particular piece of data. They can be auto-generated by many data stores, they are easy to read, efficient to store and naturally time ordered.

As time passes, applications become larger. They need more resources and usually distributed in different places. That may cause some errors generating concurrent numbers and coordination issues. Incremental numbers can also be the source of security problems and they may include implicit information about datasets volume. Modern software architectures also trend to decouple infrastructure layer and move ID generation logic to the domain core.

Instant Payment Notification (IPN) is a message service that notifies you of events related to PayPal transactions. You can use IPN messages to automate back-office and administrative functions, such as fulfilling orders, tracking customers or providing status and other transaction-related information.

MPU-9250 is one of the most advanced combined accelerometer, gyroscope and compass small size sensors currently available. It replaces the popular MPU-9150 lowering the power consumption, improving gyro noise and compass full scale range performance. It has many advanced features, including low pass filtering, motion detection and even a programmable specialized processor.

Goals measure how well your site or app fulfills your target objectives. A goal represents a completed activity, called a conversion, that contributes to the success of your business. Google Analytics goals are a way to capture interactions and allow reports to analyze behavioral, acquisition and demographic data against that information. When a visitor to your site or user of your app performs an action defined as a goal, Analytics records that as a conversion.

Touch sensor (also known as touch button) is widely used to control devices. It detects touch, force or pressure on its surface changing the logic state of the circuit. Actually, it works in very similar way as to buttons. Checkout the wiring and Arduino code implementation to track the current state and the state changes.

Having a public site with forms can become a headache if we do not prevent spam bots from submitting fake information to our application. Luckily, there is a simple and effective way to defer some of the spam using honeypots. This technique is based on creating a hidden input field that should be left empty by the real users of the application but will most likely be filled out by spam bots.