Arduino controlled Dual Mono AK4490 DAC (part 3)

Following up on Part 2, it’s time to talk about the output stage. This output stage is the brainchild of my friend Kostas, all I did was lay out the PCB. It is a fully discreet single-ended class-A output stage, outputting ~2.4V RMS. This is its schematic: This is the PCB: And this is the BoM: AK4490 dual mono DAC - Discreet Analog stage BOM (509 downloads) The BoM includes part numbers for most parts from ...

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DEBUGGING PCBS WITH AUGMENTED REALITY

Mihir Shah has designed many a PCB in his time. However, when working through the development process, he grew tired of the messy, antiquated methods of communicating design data with his team. Annotating photos is slow and cumbersome, while sending board design files requires everyone to use the same software and be up to speed. Mihir thinks he has a much better solution by the name of InspectAR, it’s an a ...

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Control LED Using IR Remote : Simple

Hello everyone, In this instructables we will control LED using IR remote. Step 1: Gather the Parts A breadboardA LEDA 220ohm resistorAn Arduino UNOA TSOP382 IR receiverSome jumper or hookup wires Step 2: Wiring Hookup all the components according to the circuit diagram shown above. Step 3: Receive the IR Signals From the Remote Download Ken Shirriffs IR library from github then add the library to ...

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Arduino for Nerf: Ballistic Chronograph

Arduino is an amazing tool for Makers, and as I got back into Nerf and started modding, I began to wonder what I could do with Arduindo to help determine the effect of modifications. Take a look at any older Nerf video and you will find a kid firing darts on their lawn over a tape measure. Take a look at any recent Nerf video, and you will see them shooting darts through an expensive ballistic chronograph. ...

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Peggy – Arduino Portable RF Rain Tracker

My country mild climate lets the sun to shine for the greatest part of the year, then tumble driers are not widely used and so we often use to drain clothes in the sun. What to do when a sudden rainfall comes? This project has been made for anyone drain clothes in the sun or, simply, needs an alert when it starts to rain. "Peggy" project is a simple portable rain traker that uses a rain sensor, 433 Mhz tran ...

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DIY Muscle Sensor / EMG Circuit for a Microcontroller

Measuring muscle activation via electric potential, referred to as electromyography (EMG) , has traditionally been used for medical research and diagnosis of neuromuscular disorders. However, with the advent of ever shrinking yet more powerful microcontrollers and integrated circuits, EMG circuits and sensors have found their way into prosthetics, robotics and other control systems. Yet, EMG systems remain ...

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SODAQ ONE board – GPS + LoRa + Solar charger

Overview: This is the third generation of our succesful SODAQ ONE board. It is equipped with a solar charge controller and runs on a LiPo or a permanent battery. It has the Ublox Eva 8M GPS module which is not only miniature but with it's assisted GPS feature it can get a fix within seconds. We've now added an extremely low power Accelerometer/Magnetometer. This gives the board a nifty feature where it can ...

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Sensirion Presents Pressure-Resistant Mass Flow Meter

The SFM4200 mass flow meter is a new star in the Sensirion range. Thanks to its high pressure resistance, it can be operated at pressures of up to 8 bar and measures flow rates up to 160 slm with a rapid signal processing time of 0.5 ms. It is particularly suitable for gas mixing in medical applications. Sensirion is one of the leading manufacturers of innovative sensors and sensor solutions that millions o ...

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OpenMV- Machine Vision for Beginners

MV is the ability of a computer to see using analog to digital conversion and digital signal processing. The key characteristics that make a machine vision module better are sensitivity and resolution. These systems allow machines to see a broader spectrum of wavelengths such as x-rays, infrared or UV light. Nowadays, it is mainly used for object recognition, signature identification, material inspection, m ...

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AI PHONE APP LEARNS BASEBALL SIGNALS

Watching a sport can be a bit odd if you aren’t familiar with it. Most Americans, for example, would think a cricket match looked funny because they don’t know the rules. If you were not familiar with baseball, you might wonder why one of the coaches was waving his hands around, touching his nose, his ears, and his hat seemingly at random. Those in the know however understand that this is a secret signal to ...

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Drones- A Blessing or a Curse?

The increasing popularity of unmanned aerial vehicles (drones) has created a lot of security issues and possible privacy threats. Drone manufacturers have made them easy to fly so that any person without any experience can buy one and fly it without reading the instruction manual first. This has made them attractive for consumers, but also for criminals. Most of them have a camera to allow the user to go to ...

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TIME SYNC THROUGH YOUR VGA CONNECTOR

While it might be in its twilight years, the venerable VGA video connector conceals a versatile interface that  can still provide the experimenter with the opportunity for a variety of hacks. We’ve not seen anything quite like [flok]’s one, in which he uses the VGA interface to insert timing information from which an NTPd instance gets its reference. If this seems counter-intuitive because a VGA i ...

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