by Kalle Hyvönen:
I needed a display for a project of mine and was just going to use a regular HD44780 -based text LCD display, until I spotted some very neat looking TINY OLED-displays from eBay.
The displays are monochrome 128×32 pixel displays with a 4-wire SPI bus and they are around 30x11mm in size (the actual display area is under an inch diagonally!). The exact type of the displays is UG-2832HSWEG04. I found a datasheet for the displays and a datasheet for the actual display controller (SSD1306) and they seemed easy enough to use so I ordered a two of them for just $13.
Using a neat little OLED-display with an Arduino - [Link]
Here’s Oscar Liang another Arduino GPS project, he writes:
Garlow stands for GPS Arduino Rechargeable Logger OLED Watch. The device gives GPS information which is logged on SD card and shown on a OLED display. It can be carried as a watch or simply used as a GPS data logger. The whole system is based on Arduino Nano, with a Lipo power management module which enables USB battery recharge.
A small GPS Arduino watch/clock - [Link]
Heinz Pieren writes:
ArdaSol is the project name for my solar energy and Arduino based monitoring system. This description shows how the system is built and how it works. The energy production of a photovoltaic plant is monitored and also the consumption or feeding to grid of the energy. Data acquisition during a solar day and publishing on the internet is also a function of this system.
ArdaSol – Photovoltaic Energy Monitoring System - [Link]
bbustin @ instructables.com writes:
Not everyone lives somewhere with central air, or is willing to pay for a Nest or similar “smart” thermostat. The Climaduino is a DIY Arduino-based thermostat designed to control a wall unit A/C. I incorporated both temperature and humidity sensors in order to optimize comfort and reduce energy usage. I then developed a Raspberry Pi-based web interface to control the Climaduino from my phone.
This is still a work in progress, but is definitely functional. I am posting this instructable so others can both build their own smart thermostats, and hopefully build on this project with their Climaduino improvements.
Introducing Climaduino – The Arduino-Based Thermostat You Control From Your Phone! - [Link]
Mizchief100 @ instructables.com wanted a way to control with dorm air conditioner so he build an Arduino thermostat that controls the control knob using a servo motor:
I am currently living in a college dorm. Like most dorms it’s about the size of a tissue box but less comforting. Fortunately, my room has a heater/AC with four positions: low, medium, high, and off. Unfortunately in winter an hour on the low setting makes the room a stifling 80 degrees and when turned off it drops quickly to 60 degrees. My solution uses an arduino, temperature sensor, and motor to automatically turn the heater on/off to keep the room within a desired temperature range. Not only is this more comfortable but it dramatically reduces the time the heater is used, saving lots of energy. (Also note that the motor is only driven to switch the setting and then turned off so no holding energy is wasted.)
Arduino Thermostat (Mechanical) - [Link]
Raj @ embedded-lab.com writes:
Here is an instructable that describes a DIY shield which would convert your Arduino board into a multifunctional digital multimeter. This shield can be used with “Arduino” UNO und Duemilanove boards, and can display the measurements on a 16X2 character LCD and/or on the serial monitor window on PC. This digital multimeter Arduino shield has the following features:voltmeter ranges : 0-10V; 0-30V; 0-100V ampmeter range : 0-500mA ohmmeter ranges : 0-1KOhm, 0-250KOhm diode, LED, continuity tester LED functionality tester transistor Beta meter.
Turn your Arduino board into a digital multimeter with this shield - [Link]
Printoo is an Arduino-based platform of paper-thin, low-power boards and modules that gives makers new levels of creative flexibility
Printoo is a platform of paper-thin circuit boards and modules. It gives makers an open-source, lightweight, flexible, and modular Arduino-compatible platform to create just about anything you want! What makes Printoo amazingly unique is that it comes with a range of printed electronics modules previously unavailable to the public. These are electronics building “blocks” of the future, only not so rigid.
Printoo: Paper-Thin, Flexible Arduino™-Compatible modules! - [Link]
Movies look cool with those EKG (electrocardiogram), the one that beeps and detects heart activities. A few months ago, we had to shoot a hospital scene for our school project. We needed an EKG instrument. To keep the movie authentic, we didn’t want to fake the readings so we made the next best thing, a pulse monitor. Since my dad is a doctor he gave me some advice to design the pulse monitor.
Homebrew Arduino Pulse Monitor - [Link]
praveen @ circuitstoday.com writes:
In this article we explain how to do PWM (Pulse Width Modulation) control using arduino. If you are new to electronics, we have a detailed article explaining pulse width modulation. We have explained PWM in this tutorial using 2 examples which will help you learn how to control LED brightness using PWM and how to control DC motor speed using PWM.
PWM Control using Arduino – Learn to Control DC Motor Speed and LED Brightness - [Link]
This Instructable will teach you how to use the Arduino Analog ports. johnag @ instructables.com writes:
Digital Voltmeters (DVMs) are a special case of Analog to Digital converters- A/DCs.- they measure voltage – and are usually a function of a general purpose instrument called a Digital Multimeter( DMMs), commonly used to measure voltages in labs and in the field. DMMs display the measured voltage using LCDs or LEDs to display the result in a floating point format. They are an instrument of choice for voltage measurements in all kinds of situations. This instructable will show you how to use the Arduino as a DC DVM (Direct Current Digital Volt Meter).
Make a Mini Arduino programmable 4 channel DC-DVM - [Link]