KULOGLUELEKTRONİK

My first Arduino project was to build a battery capacity tester. I’ve got a box of rechargeable AA batteries, and it seams they’ve been less and less effective. Since most applications require 4 batteries, invariably one problem battery makes the rest of them look bad.

The Atmel ATMega328 microcontroller has 6 analog inputs with 10-bit A-to-D converters and a external AREF that allows you to define what voltage 0x3FF represents. In other words, it’ll give you ~1.4mV precision measuring 0-1.5V when given a 1.5V analog reference. Plenty accurate for a battery capacity measurement.

The principle is fairly simple. Apply a known load to a battery, record the voltage periodically while the battery discharges, stop recording at some point, and integrate to arrive at the area under the curve in order to derive the amp-hours delivered from the battery.

Enough theory, let’s see how it works. The UI starts with a helpful message:

Buck Boost Regulator using XL6009 with Adjustable 3.3V to 12V Output Voltage

Buck-Boost regulator is made using two different topologies, as the name suggests, it consists of both buck and boost topology. We already know that Buck Regulator Topology provides a lower magnitude of output voltage than the input voltage, while a Boost Regulator Topology provides a higher magnitude of output voltage than the provided input voltage. We have already built a 12V to 5V Buck Converter and a 3.7V to 5V Boost converter Circuit using the popular MC34063. But at times, we might need a circuit that can both work as a buck and a boost regulator.

Kalp atış hızı , vücut ısısı ve kan basıncı izleme, insan vücudunun çok önemli parametreleridir. Doktorlar ateş veya vücut sıcaklığını kontrol etmek için termometre, kan basıncı ölçümü için BP monitörü ve kalp atış hızı ölçümü için nabız monitörü gibi çeşitli tıbbi cihazlar kullanır. Bu projede, bir dakika içinde kalp atışı sayısını sayan Arduino tabanlı bir kalp atışı monitörü inşa ettik . Burada , sensöre parmağınızı koyduğunuzda kalp atışını algılayan bir kalp atışı sensörü modülü kullandık.

Abstract
The Arduino inbuilt 10 bit ADC, can be used for constructing / measuring the 0 Volt to 1000 Volt user selectable Digital Volt Meter. The 16x2 LCD display driver, connected with Arduino Uno will be used for displaying the measured voltage. This voltmeter can read only DC voltage.

M.Pugazhendi build a digital voltmeter using Arduino and MAX7219 display driver.

The Arduino inbuilt 10 bit ADC, can be used for constructing / measuring the 0Volt to 50Volt Digital Volt Meter. Popular MAX7219 display driver, connected with Arduino Uno will be used for displaying the measured voltage. This voltmeter can read only DC voltage.

I found a website that solves all the wiring and coding issues; A library, written by Dean Reading.
I downloaded the zip file, copied it to /usr/share/arduino/libraries/ and unzipped it (includes the .cpp, the .h and an example sketch). (The directory is correct for my Linux Mint 16 system).

Given this library, the example code is simplicity itself.
I used the wiring listed on the webpage, which when interpreted gives us :

This was a great buy, easy to wire up and surprisingly accurate, when I measured up to 3 metres.
I found another blogger who had created the code.

Hello world! Today i made a simple and very cheap to build alarm System with a keypad, pir sensor, relay and a very loud alarm strobe. You have 30 seconds time to leave the room after activating the alarm system, of course this can be changed in the code to less or more seconds. Now it has been set to 30000 milliseconds.
You can change it at this line in the code:
const int timeDelay = 30000; //give yourself time to leave the room

Follow the next step for the Schematic, Code & Parts list.

PIC16F676 mikrodenetleyicisindeki bir voltmetreye ayrılmış bir makale uzun süre sitede yayınlanmıştır . Zamanla, bazı ziyaretçiler voltmetrede değişiklik yaptı ve bu değişiklikleri paylaşmaya karar verdi. Bunun için minnettarlar.

Makale, PIC16F676 üzerinde yapılan 50 voltluk bir ölçüm limiti olan bir voltmetreyi veya bu mikrodenetleyicinin ADC'sinin nasıl kullanılacağını açıklar.

If you don't have an easy way to order an Arduino board or kit, you can etch this PCB design by hand and solder it together. It is pin-compatible with the Arduino Diecimila, and should work with any Arduino shield.

This is the third revision of the board: the Arduino Single-Sided Serial version 3, or s3v3, or Arduino Severino. It was designed by Adilson Akashi, based on the previous version.