Electronics

Electronic transfer tattoo with a crease amplification effect

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Electronic tattoos can have applications during health and movement sensing on human skin. Nevertheless, the existing versions are nonconformal, sticky and multi-layered. In a new report, Lixue Tang and a research team in biomedical engineering and nanoscience in China achieved the multilayer integration of an 800 percent stretchable, conformal and sticky electronic tattoo. The construct allowed the crease amplification effect, which amplified the output signal of the integrated sensors by three times. The team showed the possibility of transferring the tattoo to a different surface to formed a firm attachment without solvent or heat. The researchers used a straightforward method to fabricate the tattoo based on a layer-by-layer strategy with two materials used to fabricate the circuit mode within the tattoo. The three-layered tattoo integrated one heater and 15 strain sensors for temperature adjustment to monitor movement and to remotely control robots.

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Making your own Segway, the Arduino way

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After obtaining motors from a broken wheelchair, this father-son duo went to work turning them into a new “Segway.”

The DIY transporter is controlled by an Arduino Uno, along with a pair of motor drivers that handle the device’s high current needs. An MPU-6050 allows it to react as the rider leans forward and backwards, moving with the help of a PID loop. Steering is accomplished via a potentiometer, linked to a bent-pipe control stick using a bottle cap and glue.

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Hands-On with the RP2040 and Pico, the First In-House Silicon and Microcontroller From Raspberry Pi

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The RP2040, Raspberry Pi’s first in-house silicon, debuts on the Raspberry Pi Pico, its first microcontroller board — and it’s just $4.

The launch of the original Raspberry Pi in 2012 was the dawn of a new era of low-cost, easy-access single-board computers (SBCs). In the years since the Raspberry Pi family has grown both upwards, now on its fourth full generation, and outwards with a range of devices from the ultra-low-cost Raspberry Pi Zero family to the consumer-ready all-in-one Raspberry Pi 400.

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James Bruton demonstrates the Coanda effect with an Arduino-controlled rig

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The Coanda effect, as you may or may not know, is what causes flowing air to follow a convex surface. In his latest video, James Bruton shows how the concept can used as a sort of inverted ping pong ball waterfall or staircase.

His 3D-printed rig pushes balls up from one fan stage to another, employing curved ducts to guide the lightweight orbs on their journey.

The fan speeds are regulated with an Arduino Uno and motor driver, and the Arduino also dictates how fast a feeder mechanism inputs balls via a second driver module. While the setup doesn’t work every time, it’s still an interesting demonstration of this natural phenomenon, and could likely be perfected with a bit more tinkering.

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This DIY electronic puzzle lets you construct circuits by plugging blocks into a 3D-printed board.

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When ‘victorqedu’ was a child, he had an electronic puzzle game that enabled him to make various circuits from electronic components, such as lights, buzzer sounds, and even a radio. This fascinated him, and as “a programmer with a lot of hobbies,” it certainly had some influence on his life. He wasn’t able to find this game for sale today, so decided to build his own 3D-printed version, with component blocks that plug in to complete various circuits.

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

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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.