Projects

Arduino RPM Counter

Arduino RPM Counter / Tachometer Code

Arduino projects, make arduino rpm counter with arduino.   Instruction;1) Connect all jumper wire as shown in diagram. 2) Connect IR LED to digital pin 13. 3) Connect IR Phototransistor (dark) to digital pin 2. Make sure shorter lead connected to digital pin 2 and longer lead to Ground. Upload this code to your arduino/** Optical Tachometer** Uses an IR LED and IR phototransistor to implement an optical tachometer.* The IR LED is connected to pin 13 and ran continually.* Pin 2 (interrupt 0) is connected across the IR detector.** Code based on: www.instructables.com/id/Arduino-Based-Optical-Tachometer/* Coded by: arduinoprojects101.com*/ […]

Arduino Ultra Sonic Sensor 2

Arduino HC-SR04 How to use Ultra Sonic Sensor

Arduino HC-SR04 The Arduino HC-SR04 is different from most of those commonly seen on the market, which have 4 pins compared to 3 pins. But the operation principle is the same, transmit signal, and depends on when the signal is received to estimate the distance. Arduino HC-SR04 not only inexpensive but also practical, use a […]

Arduino Hexapod Robot

Arduino Hexapod Robot

Arduino Hexapod Robot Design I will show you how to build an arduino hexapod robot, from building the body, to how to implement the algorithm. To learn about the implementation of the algorithm, read this first, if you are not sure what is IK, read this. China_icon 中文翻译：http://blog.oscarliang.net/arduino-liu-zhua-kun-chong-liu-zhua-shou-ji-yuan-dai-ma/ I ordered parts from a robot frame […]

Arduino GPS Tracker Circuit

Real-Time Arduino GPS Tracker with iPhone app

[INTRO] This past semester, I decided to build a GPS receiver with an iPhone app that tracks it for my semester project. Here is a step-by-step tutorial to show you how you can build your own. [OVERVIEW] Architecture of my Real-Time GPS Tracker project. I’ll be using the diagram above to explain how the project […]

Arduino GPS Tracking System 2

Arduino GPS Tracking System

This was easily the most time I’ve spent producing an Arduino Tutorial. I’ve been sporadically walking around NYC with this Arduino GPS for weeks as I’ve tweaked the code and gotten it just right. If it wasn’t obvious from the title, this tutorial will teach you how to use an arduino paired with a GPS Module […]

A arduino library circuit

A arduino library for the MAX7221 and MAX7219

These two chips provide an easy way to control either an array of 64 Led’s or up to eight digits made of 7-segment displays with a minimum of electronic components. Besides the chip itself you will need only a single resistor and one or two capacitors. Data is send to the chip using a SPI-compatible […]

An amplifier for Arduino

An amplifier for Arduino

For my project, the Arduino output is not enough so digging on the net and asking to a friend some help, I managed to build an amplifier to feed my 3 computer fans. This circuit can be used as an amplifier to switch on and off a DC motor and to regulate its spinning speed […]

Arduino temperature controlled PC Fan schematic 1

Arduino temperature controlled PC Fan

Oscar Gonzalez gives us a simple tutorial for speed controlling a PC FAN and reading a LM35 temperature sensor with an Arduino microcontroller. He covers the use of an optocoupler, PWM (Pulse Width Modulation) and reading analog voltages with the Arduino. He even has a video showing the fan speed control in action. This article […]

Power Meter using Arduino

Power (Energy) Meter using Arduino

Part 1.  Analog Front-End. Opto-Isolator. Looking at the Power Quality Analyzer display, I was wandering, if there is any error in the measurement results, introduced by transformer. Overall THD picture doesn’t change much, suspiciously drawing same chart in the morning and in the evening, when electrical grid load significantly differs. Obviously, to estimate effect of […]

Audio VU Meter using Arduino 1

Audio VU Meter using Arduino

Biasing AC input using resistor divider and scaling up / down if necessary; Sampling fast and accurately using direct access to Control Registers of ADC and Timer1; Subtract whatever was added at step #1 from result of Analog / Digital conversion and Square; Average / accumulate, filtering following VU specification; Sqrt – take square root, […]

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