Learn how to make an alarm clock with an Arduino, a 2x16 LCD, and a DS3231 real time clock module Previous Post An easy to follow guide to making a bootable Windows 7 thumb drive for installing on a netbook. Next Post Arduino 3. Volt LiPo Battery Meter. Wire.H Arduino Library Download' title='Wire.H Arduino Library Download' />Arduino ADS1. ADC Tutorial 1. Introducing A Low Cost and Precise Arduino Measurement. The ADS1. 11. 5 is a 1. Analog Digital Converter that can greatly improve your Arduino resolution and measurement accuracy. It has four input channels that can be configured for Single Ended, Differential or Comparator Measurements. This Tutorial will focus on showing you how to make your first single ended 1. ADS1. 11. 5.   Even this mode provides a substantial improvement in resolution over your Arduino Analog input. You need to download another Library to get the Arduino to talk with the DHT11 sensor. The sensor I got didnt come with any documentation, so I Googled around until. Nice sensor. Here is an Arduino Sketch that lights it up Adapted from Pololus Board Since I use 45 for signal, the next pins 23 can be used for power. As you may be aware from my previous post I recently was in the market for a more accurate replacement for the DS1307 RTC clock. I tried with a DS3234 but its SPI. This time I will be showing you how to make a module for letting the Arduino find out the time. Although there are many tutorials for the Real Time Clock module I. Introduction. Welcome to the LCD Library for Arduino and Chipkit. It is a derivate of the original LiquidCrystal Library as sourced in the Arduino SDK. FLX/1NJW/HZ3YAXNL/FLX1NJWHZ3YAXNL.MEDIUM.jpg' alt='Wire.H Arduino Library Download' title='Wire.H Arduino Library Download' />Other tutorials will demonstrate other powerful features. See how to make a differential measurement using your ADS1. This type of measurement allows you to make negative voltage measurements as well. Getting One. As  depicted in pin out drawings below,  the  ADS1. They are available from any of the outlets below. Bay     Amazon     Deal Extreme    Bang Good. Arduino ADS1. 11. Bit DAC Module Pin Outs. The module below is the most common. It will require addressing see the next section. There are four addresses available. This next module is less common. The address is preset to 0x. It also does not include the AlertReady signal. In most applications, you will not require this signal. Arduino ADS1. 11. Bit DAC Module Addressing. The four addresses for the ADS1. ADDR pin to SCL, SDA, GND or VDD. The image below illustrates how these connections are make and provides the address number for those connections. Adobe Premiere Elements Plugins. Understanding the ADS1. Resolution. Is it 1. The output of the ADS1. That means one of the bits in the 1. This will be discussed more later,   but what is important to grasp is that only 1. What this means is that there are 3. Bottom line is that is indeed a 1. ADS1. 11. 5 Full Scale and the Value of Bit. The value of a bit is determined by the Programmable Gain Amplifier PGA setting as is this setting establishes full scale. This differs from the Arduino where full scale is determined by a reference voltage. The PGA will be discussed in another article. In the default mode, the setting is 6. Thus the value of 3. Dividing 6. 1. 44 volts by 3. V per bit.    This is a significant improvement over the Arduino ADC which resolution of approximately 5 m. V per bit.   In fact, its about 2. The neat thing about this is that this is worst case. In another PGA setting, you can establish a full scale of 2. That provides us a resolution of 0. V. ADS1. 11. 5 Maximum Measurement Range. The PGA setting of 6. You cant. Instead, the maximum measurable voltage is established by the supply voltage to the chip. Specifically, the maximum measurable voltage is 0. In fact, exceeding this voltage at your analog input may damage your chip. Note the differentiation here between the PGA range and the maximum measurable voltage. The programmed range determines the value of a bit or scale factor,   while the maximum measurable range determines what your analog input can safely handle. Arduino ADS1. 11. Analog to Digital Converter Simple Tutorial. This is a simple tutorial because all youre going to do is make a simple measurement while observing the resolution and repeat ability or precision of the measurement. In running this tutorial, were going to make use of a library distributed by Adafruit. Download and Install the Adafruit ADS1. X1. 5 Library. As previously mentioned,  you will need the Adafruit ADS1. X1. 5 Library.   It is available HERE. If your are unfamiliar with installing libraries,  you can read this article on the Arduino website found HERE. Connect the ADS1. Module to Your Arduino. In this tutorial, were going to keep it real simple. Were just going to measure the 3. Arduino. Copy, Paste and Upload the ADS1. Arduino Sketch. Notice the constructor where I insert the address 0x. Notice how I also did not make any attempts to set the Programmable Gain Amplifier. This is because default value is already 6. In my loop, you will notice that I applied the 0. V scale factor related to this full scale range to my result. Wire. AdafruitADS1. AdafruitADS1. 11. Voltage 0. 0. voidsetupvoid. Serial. begin9. 60. ADC, we have a sixteen bit integer as a result. ADCSingle. Ended0. Voltage  adc. 0  0. Serial. printAIN0. Serial. printadc. Serial. printt. Voltage. Serial. Voltage, 7. Serial. Verify Your Tutorial Output. If you are successful,  your output will look a lot like the picture below. Notice how rock steady the result is. The difference between readings is less than one millivolt. Now, whats hard to determine is if that fluctuation is due to the 3. Arduino, the ADS1. Never the less, what we clearly have is a measurement that is very repeatable precise. In fact, repeat ability is often a lot more useful in measurements than accuracy. We can quantify the error in a very repeatable measurement and apply a little math to make it very accurate. When the measurement is not very precise,  we are stuck with a degree of uncertainty that is very difficult to correct for.