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Advantages and Disadvantages of Convertible Laptops

Traditional laptops are portable enough but many of us are now used with touch and pen interface because of the penetration of the smartphones. The tablets with an i7 processor are just too damn expensive. Within a budget of $2,000, convertible laptops with 2K to 4K displays are simply ludicrous. The convertible laptops are designed for the budget-conscious audience who do not need a graphics … [Read more...]

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Does Intel Optane Memory Module Work?

These days especially for the laptops, the salespersons will tell you "This model has 16GB of Intel Optane Memory. You can upgrade it to 32GB." Intel Optane memory module is the worst form of pushing a thing before which there is a lot of hardware needs to get upgraded. A computer's performance becomes better with more amount of faster RAM (right now that is 16GB to 32GB), a faster SSD and a good … [Read more...]

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How Autonomous Emergency Braking (AEB) Works

An autonomous emergency braking system is an extension of the emergency braking assistant. An emergency braking assistant is a predictive driver assistance system for motor vehicles that warns the driver in case of danger, supports emergency braking (brake assistant) or brakes automatically. This is to avoid collision with an obstacle or reduce the collision speed. Some emergency braking … [Read more...]

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ESP32 as Hardware Random Number Generator

The capability of the ESP32 to generate truly random numbers is important for cryptographic operations. A random number generator generates a sequence of random numbers. A hardware random number generator is also known as a true random number generator. It generates random numbers from some physical process, not from code. A fundamental distinction is made between non-deterministic and … [Read more...]

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How Server-Based Gaming (SBG) Works

The casino industry uses the server-based gaming (SBG) hardware system to operate Video Lottery Terminals slot machines. General non-casino gaming systems differ from the casino systems in various ways. Server-Based Gaming (SBG) is built upon the server-centric gaming technology borrowing the principles from thin client. Reliability, scalability and stability are few of the requirements in the … [Read more...]

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Reusing the Technologies of Latest Vaping Devices

The goal of this article is to discuss the art of engineering employed in various mods which may be employed in other devices of day to day usage. Vaping can be illegal or restricted in certain countries. Purpose of this article is not to encourage breaking the laws. For developmental purpose, first, we need to briefly discuss the construction of an e-cigarette. Table of Contents 1 … [Read more...]

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Note on Calculating Distance From RSSI Value of BLE Devices

A quick question from one reader after publication of Smartwatch BLE to Trigger IBM Watson IoT Event was "can I measure the distance in meters and broadcast?". The answer is - it is not reliable with easy formula against a single BLE device. If we were using Raspberry Pi, then we could think of using complex coding. BLE technology and works with Indoor Location Positioning is not new. RSSI … [Read more...]

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Detect Samsung Smartwatch BLE and Trigger IBM Watson IoT Event

We can trigger ESP32 to send message to IBM Watson IoT in Presence of a Particular Samsung Galaxy Smartwatch. This involves BLE and WiFi. In our one series of articles on Samsung Smartwatch as Proximity Switch, we triggered a local event, such as control of a relay. In our other series of articles, we sent message to IBM Watson IoT with upon pressing a button (this guide and this guide). Now, … [Read more...]

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Solve ESP32 Sketch Too Big Error on Arduino IDE

Sketch too big is a common issue faced inside Arduino IDE while working with BLE. Most of us set up the Arduino IDE for ESP32 and forget to alter any other settings of the IDE because except some situations, we never face this problem. The error will suggest you navigate to this official webpage of Arduino (which is not exactly related to ESP32), which will tell you … [Read more...]

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DIY IR Blaster Circuit For Smartphone

An IR blaster emulates an infrared remote control to control devices such as a DVR or VCR, Air Conditioner, Television and so on. IR blaster was a common feature of Nokia's most of the mid-range smartphones of the 2000 era. Most of the manufacturers (read Samsung) have stopped including this feature at least in the mid-range phones. This is not just another article to join two IR LEDs with a 3.5mm … [Read more...]

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Samsung Smartwatch as Proximity Switch : Part V [END]

This is the final part of the series. In Part I, we talked about the basics which continued to Part II. Part III had a working code non-specific to any particular device. Part IV had a partially working code specific to a particular device. circuitdigest.com's code (in Part IV) was not working with Samsung Galaxy Watch LTE. Samsung's smartwatches shutdown both BLE and traditional … [Read more...]