DIY Soil NPK Meter || Measure Soil Nutrient Content using Soil NPK Sensor & Arduino

In this video, we will learn about the interfacing of Soil NPK Sensor with Arduino. The soil nutrient content can be easily measured using NPK Soil Sensor & Arduino. Measurement of soil content N (nitrogen), P (phosphorus), and K (potassium) is necessary to determine how much additional nutrient content is to be added to soil to increase crop fertility.

The soil fertility is detected using NPK sensors. A major component of soil fertilizer is nitrogen, phosphorus, and potassium. The knowledge of the soil nutrient concentration can help us to learn about nutritional deficiency or abundance in soils used to endorse plant production. Apart from measuring Soil NPK, you can also measure Soil Moisture Content using Soil Moisture Sensor, which is explained in my one the previous video.

Use This One Simple Trick to Smooth Large Fonts on Graphics Displays

Graphic displays are great at showing rudimentary numbers and letters in block form at a small 6 x 8 resolution, but kicking those fonts up to a larger size, such as 12 x 16, makes the characters look blocky or distorted. The problem here is the larger magnification also increases the empty areas within the character block; thus, the numerals look jaggy. Electronics enthusiast David Johnson-Davies has come up with a technique to fix that issue and seemingly smooth over those characters, making them readable at a distance.

The smoothing works by checking whether one of the following two situations A or B occur anywhere in the double-resolution character. (đź“·: Technoblogy)

The smoothing works by checking whether one of the following two situations A or B occur anywhere in the double-resolution character. (đź“·: Technoblogy)

In his recent Technoblogy post, Johnson-Davies took a closer look at the problem, analyzed the smoothing problem, and found that the character block’s angled areas were responsible for the distortion, while the horizontal and vertical scaling of the font remained smooth. His fix entails looking at the checkered patterns at what’s being drawn, then adding a single pixel to fill in the blanks, making them appear smooth when upscaled. Johnson-Davies packaged his approach into a simple function that works in an Arduino environment, although it can easily be tailored to work no matter what language users prefer.

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New Off-Grid Solar Inverter Design Reaches 99.5% Peak Efficiency

Solar panels, while they can last for decades, can suffer from loss of efficiency when routed into your home. Instructables user MPaulHolmes has a fairly uncomplicated solution for off-grid solar systems to eliminate pulse width modulation, have bare minimum switching of the transistor, and maintain small total harmonic distortion.

The hardware requirements for this high-efficiency off-grid solar inverter are fairly simple — you will need to build a circuit that can independently control three separate H-bridges. The bill of materials for the prototype, as well as the software and schematic, are freely available should you contact the designer via email, or you can wait to purchase a newer version of the PCB that will soon be made public.

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Invisible Network Device Reveals Machines’ Social Network

This portable device makes the invisible and autonomous communications of machines perceptible and tangible.

To get a better understanding of the ecosystem of networks, Wi-Fi in particular, ECAL (Ecole cantonale d’art Lausanne) University of Art and Design student Evan Kelly developed a portable device that visualizes a machines’ social network of sorts.

“Invisible Network is a portable device that makes the invisible and autonomous communications of machines perceptible and tangible. The way they interact with each other is akin to human communication modes, thus creating an entire social network of machines,” Kelly describes. “This device mediates between users and the machines around them. Via the screen, it transmits fragments of its continuous and silent communications in the form of human social metaphors.”

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How to make Mini Radar | Arduino based

Hello friends in this video I have made a Mini compact Radar with display, for that I have used HC-SR04 ultrasonic sensor, this sensor emit ultrasonic sound which came back to sensor after reflecting from an object, all the data visualization is displayed on 1.8″ ST7735 display, if any object detect by radar it’ll show in display in red line.

The World’s Smallest Portable Nintendo 64 Is Barely Larger Than a Cartridge

There’s a niche arms race among hardware hackers to create ultra compact versions of video game consoles, and YouTube’s GmanModz appears to have successfully miniaturized an entire Nintendo 64 into a portable that’s not much bigger than an N64 game cart—making it possibly the world’s smallest to date.

The last time we featured one of GmanModz creations they had turned an N64 into a super-sized GBA SP complete with a folding screen, but as impressive as it was, the hacked console was still a bit on the chunky side as far as portable gaming systems go. Trying to squeeze it into a pocket would have been an uncomfortable endeavor.

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