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The Microcontroller Blog

The microcontroller blog keeps you up-to-date with all additions and changes to the best-microcontroller-projects.com Web site.


Easily make an IR Pulse Rate Sensor with one opamp, an Arduino, and a matched Infrared phototransistor and LED pair.

How to make a Pulse Rate Sensor using a simple single opamp circuit with an Arduino and a few other components.

Continue reading "Easily make an IR Pulse Rate Sensor with one opamp, an Arduino, and a matched Infrared phototransistor and LED pair."

74HC595

74HC595 : How to add nearly unlimited outputs to any microcontoller.

Continue reading "74HC595"

Using the MAX6675 or How to easily measure Extreme temperatures

How to use the MAX6675 and an Arduino to measure temperatures from 0°C to 1024°C with two components: A chip - the MAX6675, and a Sensor: - a type-K thermocouple.

Continue reading "Using the MAX6675 or How to easily measure Extreme temperatures"

How to use the DHT22 (or DHT11) with an Arduino; full code and description. Also including a comparison of the DHT11 vs DHT22.

The Essential Guide to the DHT22/11 humidity sensor including a library code guide for the Arduino. Learn how to determine Humidity, Dew point and Heat Index.

Continue reading "How to use the DHT22 (or DHT11) with an Arduino; full code and description. Also including a comparison of the DHT11 vs DHT22."

How to Use the MAX7219 to drive an 8x8 LED display Matrix on the Arduino.

The Essential Guide to the MAX7219; What it is and how you can easily use one in any of your projects.

Continue reading "How to Use the MAX7219 to drive an 8x8 LED display Matrix on the Arduino."

How to use a DS18B20 (single or multiple on one wire) for temperature measurement using the Arduino Uno.

How to Easily Use the DS18B20 Maxim One-Wire thermometer with Arduino example code showing external or parasitic power modes.

Continue reading "How to use a DS18B20 (single or multiple on one wire) for temperature measurement using the Arduino Uno."

The best Microcontroller projects and resources.

Do you want to learn how to use a microcontroller in your electronic projects or do you need inspiration for your next project? If so you have found the right place!

Continue reading "The best Microcontroller projects and resources."

Digital Signal Audio Circuit

How to identify the end of a programming sequence using a signal listening circuit.

Continue reading "Digital Signal Audio Circuit"

Blind Spot Detector

Blind spot detector : How to make a device to warn you of a car in the blind spot where your mirror can not see.

Continue reading "Blind Spot Detector"

Infrared Audio Transmitter System

Infrared audio transmitter system : How to make an infrared assisted hearing audio transmitter circuit

Continue reading "Infrared Audio Transmitter System"

Nail Finder Circuit

Nail Finder Circuit: How to find nails in walls using a radar circuit not electromagnetic (very simple).

Continue reading "Nail Finder Circuit"

A PIC Serial LCD project.

How to create a serial LCD module using the PIC microcontroller's built in USART.

Continue reading "A PIC Serial LCD project."

Flame Detector Circuit

Flame detector circuit : How to use UV light to detect a flame.

Continue reading "Flame Detector Circuit"

Gem Tester Circuit

Gem tester circuit : How to test whether your gems are real using conductivity.

Continue reading "Gem Tester Circuit"

Digital I/O Expansion - How to increase your microcontroller Input and Output pins.

Digital I/O expansion. Several diferent serial design techniques with different tradeoffs to increase the number of input or output pins in your microcontroller design.

Continue reading "Digital I/O Expansion - How to increase your microcontroller Input and Output pins."

Alkaline Battery Charger

Alkaline battery charger : How to make a simple dry cell alkaline battery charger circuit

Continue reading "Alkaline Battery Charger"

An Ultrasonic Distance meter project.

A PIC Ultrasonic Distance meter project using a PIC microcontroller which is ideal since it has a capture timer that can accurately measure the ultrasonic echo time, so calculating the distance is easy.

Continue reading "An Ultrasonic Distance meter project."

Charlieplexing

How to drive multiple LEDs with very few microcontroller outputs.

Continue reading "Charlieplexing"

A dot matrix LED display project for an 8x8 or 5x7 led matrix.

How to drive a dot matrix LED display. This project shows you how to drive one with 64 LEDs (8 rows by 8 columns) or less e.g. 35 LEDs (7 rows by 5 columns).

Continue reading "A dot matrix LED display project for an 8x8 or 5x7 led matrix."

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Recent Articles

  1. Easily make an IR Pulse Rate Sensor with one opamp, an Arduino, and a matched Infrared phototransistor and LED pair.

    How to make a Pulse Rate Sensor using a simple single opamp circuit with an Arduino and a few other components.

    Read more

  2. 74HC595

    74HC595 : How to add nearly unlimited outputs to any microcontoller.

    Read more

  3. Using the MAX6675 or How to easily measure Extreme temperatures

    How to use the MAX6675 and an Arduino to measure temperatures from 0°C to 1024°C with two components: A chip - the MAX6675, and a Sensor: - a type-K thermocouple.

    Read more



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