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Archive for the ‘Test/Measurements’ Category

Apr
19

Arduino ultrasonic range finder

arduino, distance, distance measurement, Test/Measurements, ultrasonic Commenti disabilitati su Arduino ultrasonic range finder 

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Jan_Henrik @ instructables.com writes:

In this project i want to show and explain you a range sensor with ultrasonic and a 20×04 lcd screen. I wrote the code for this project myself and added lots of comments, so that everybody can understand it and use it for other projects (maybe a light range sensor?!). It is easy to build and much more easier to program, it just requires a few cheap parts and can run on battery, for a portable rangefinder.

The maximum rated range is 500 cm, the range is measured 20 times per seccond. It is Displayed on a lcd screen which is 20×4 chars big, it has a custom start message, and it can have a custom design while measuring. It will have a backlight LED and can run on every arduino, which has I²C communication. That mean you can run it on an Arduino nano, which is very small. It also requires 5V so it has to be a 5V version of an Arduino.

Arduino ultrasonic range finder - [Link]

Ott
28

Building a constant current/constant power electronic load

arduino, ATmega328P, current, Load, power, Test/Measurements Commenti disabilitati su Building a constant current/constant power electronic load 

ElectronicLoad200W-600x450

Kerry Wong built a DIY constant current/constant power electronic load. It can sink more than 200W of power:

A while back I built a simple constant current electronic load using an aluminum HDD cooler case as the heatsink. While it was sufficient for a few amps’ load under low voltages, it could not handle load much higher than a few dozen watts at least not for a prolonged period of time. So this time around, I decided to build a much beefier electronic load so it could be used in more demanding situations.
One of the features a lot of commercial electronic loads has in common is the ability to sink constant power. Constant power would come in handy when measuring battery capacities (Wh) or testing power supplies for instance. To accommodate this, I decided to use an Arduino (ATmega328p) microcontroller.

[via]

Building a constant current/constant power electronic load - [Link]

Set
05

Make a WiFi Weather Station With Arduino and Adafruit’s CC3000 breakout

arduino, CC3000, Humidity, temperature, Test/Measurements, weather, wifi Commenti disabilitati su Make a WiFi Weather Station With Arduino and Adafruit’s CC3000 breakout 

cc3000_small

Make a WiFi Weather Station With Arduino and Adafruit’s CC3000 breakout.

As open-source hardware users and makers, we love playing with new chips, boards and tools. And there is one chip which is quite popular these days: the CC3000 WiFi chip from TI. This chip comes with many promises: cheap (around $10), easy to use, low-power … It was featured in many articles around the web, but somehow it was quite hard to use with Arduino as there was no breakout board or library available. Luckily, Adafruit solved that for us with a nice breakout board and a working library for Arduino. In this article, I will show you how to use this chip for home automation purposes. Remember that weather station project? We are going to do the same: measure the temperature and the humidity. But this time we won’t display the information on an LCD screen. Instead, we will transmit the data wirelessly via WiFi to your computer and display it there. Excited ? Let’s get started!

Make a WiFi Weather Station With Arduino and Adafruit’s CC3000 breakout - [Link]

Lug
26

Using an Arduino to Control or Test an SPI electronic device

arduino, SPI, Test/Measurements Commenti disabilitati su Using an Arduino to Control or Test an SPI electronic device 

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techshopdude @ instructables.com writes:

There are many electronic devices that use the SPI bus, or Serial Peripheral Interface bus, for communications (e.g. various sensors, LCD displays, digital potentiometers, D/A and A/D converters, wireless transmitters and receivers, audio volume controls). The devices receive data serially from a microcontroller using a 3-wire set-up that includes a chip select signal (usually titled CS – when this signal is at logic 0, a chip recognizes it will be receiving or sending data), a clock signal for clocking the serial data into the device, and the serial data stream itself.

Using an Arduino to Control or Test an SPI electronic device - [Link]

Lug
22

Tempduino – Arduino Based Temp and Humidity Display

arduino, Humidity, Tempduino, temperature, Test/Measurements, thermometer Commenti disabilitati su Tempduino – Arduino Based Temp and Humidity Display 

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Ktulu_1 @ instructables.com writes:

The temperature in my office at work varies quite a bit depending on the time of day, season, and the whims of the other people I share the floor with. When I’m sitting at my desk shaking uncontrollably or sweating profusely it would be nice to know if it’s due to the temperature or just work related stress. A simple $5.00 thermometer would suffice, but where’s the fun in that? Making my own thermometer might cost ten times as much, but I might learn something in the process and it would be way cooler than any cheap store bought thing? I’d rather make something myself even if I have to pay a “maker’s premium.”

Tempduino – Arduino Based Temp and Humidity Display - [Link]

Lug
07

DIY DC Amp Volt Watt Meter

arduino, Test/Measurements, ZXCT1010 Commenti disabilitati su DIY DC Amp Volt Watt Meter 

arduino86-9

Koltykov A.V. writes:

In this article, I will use the current monitor based on the ZXCT series IC for measuring current voltage and watts. In my task needed measure the load current of not more than 2A, the range of 200 mA to 1.5 A. Load power supply voltage: 12 volts.

DIY DC Amp Volt Watt Meter - [Link]

Giu
26

Arduino Uno 3 million samples per second logic analyzer

arduino, arduino uno, logic analyzer, Test/Measurements Commenti disabilitati su Arduino Uno 3 million samples per second logic analyzer 

Arduino-Uno1

Bob Davis has built an Arduino powered three Million samples per second six channel logic analyzer:

In the video below you can see what the live display looks like. He is using a 74 series decade counter to divide down a 10Mhz crystal so that he has some nice fast stuff to sample. He experimented with the coding style and found that by being a bit verbose with the instructions he was able to speed up the data collection by over 50%. This technique requires a bit more code space and doesn’t look as elegant as a nice tight loop but execution efficiency is the name of the game here.

[via]

Arduino Uno 3 million samples per second logic analyzer - [Link]

Giu
24

Building a simple digital light meter using Arduino and BH1750FVI sensor

arduino, BH1750, light, light meter, Lux, Sensor, Test/Measurements Commenti disabilitati su Building a simple digital light meter using Arduino and BH1750FVI sensor 

DigitalLightMeterTitle2

A light meter is a device that measures the intensity of light. It finds applications in schools, hospitals, production areas, passageways and more to measure and maintain proper lighting levels. It is often used by photographers to determine the proper exposure for a photograph. Today we are going to build a simple light meter using an Arduino board and a BH1750 digital light sensor. The measured lighting level or intensity is displayed on eight seven segment LED displays, in both Lux and Foot-candle units.

Building a simple digital light meter using Arduino and BH1750FVI sensor - [Link]

Giu
20

Arduino LCD Oscilloscope

arduino, KS0108, LCD, oscilloscope, PIC18F2550, Test/Measurements Commenti disabilitati su Arduino LCD Oscilloscope 

IMG_4199

semifluid.com writes:

It has been 7 years (!) since I posted my PIC18F2550 KS0108 Graphical LCD Oscilloscope code and schematics. I have long since taken the circuit apart, sold my PIC microcontrollers, and moved on in my life (as one can surmise from my most recent posts detailing my graduate and postdoctoral work). However, I still get inquiries about the Microchip PIC oscilloscope, so I decided to recreate it using a simpler setup using my Arduino Fio.

[via]

Arduino LCD Oscilloscope - [Link]

Feb
07

Simple Sensor Webserver ENC28J60 and Arduino

arduino, CM-R, ENC28J60, ethernet, LM35, Test/Measurements Commenti disabilitati su Simple Sensor Webserver ENC28J60 and Arduino 

ENC28J60_module

voltsandbytes writes:

Probably, some of you have tried buying cool but cheap products from Ebay. Like some of you, I also have bought items from Ebay several times already. One of the items that I got from Ebay is a small ENC28J60 based ethernet module.

As you can see from the image above, the ENC28J60 module is very small. The PCB is more or less one-inch square which is almost as small as the included ethernet jack.

Simple Sensor Webserver – [Link]



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