ShillehTek ADS-1115 Pre-Soldered Analog to Digital Converter

This was excellent for integrating analog photoelectric sensors into our last robotics build We made an arm that waves when you turn on the light and needed an analog to digital converter since the Pi didnt have any inputs and this worked great No staggered or noticeable idle power draw which was good for our battery and even had extra pins for input so were thinking about adding a temperature sensor to display or announce room temp 1010

For me this was a 20 hour learning curve I used this with the LILYGO TDisplayS3 LCD which is an ESP32 device with a VDD of 33 volts I didnt realize the display has a tiny I2C connector near the end pins 4344 Most ADS1115 examples do not allow or explain how to specify the I2C pins I dont have the tiny I2C connector so I needed to specify my own pins I found the ADS1X15 library by Adafruit on Arduino IDE was the easiest and best library to use I used 33K pullup resistors for both the SDA and SCL pins to pull them up to 33v Doing this allows the I2C bus to run at a faster speed Example codeinclude AdafruitADS1X15hAdafruitADS1115 ads Use this for the 16bit version In Setup WirebeginI2CSDAPin I2CSCLPin specify custom pins for I2C adsbeginADS1115I2CAddressWire adssetGainGAINONE 1x gain 4096V 1 bit 0125mV adssetDataRateRATEADS111532SPS 32 samples per second it takes 32 ms per sampling To read ADC values int16t adc0 adc1 adc2 adc3 adc0 adsreadADCSingleEnded0 adc1 adsreadADCSingleEnded1 adc2 adsreadADCSingleEnded2 adc3 adsreadADCSingleEnded3Note the I2C address of this ADS1115 device is 0x48Be sure to connect something to all 4 pins A0 A1 A2 A3 If any of these pins are unused connect the unused pins to either VDD best or GNDCheck out Roberts Smorgasbord on Youtube for an explanation of ADS1115

Most modern microcontrollers have some form of internal DAC function but few have a 16bit DAC This higher resolution gives you higher accuracy no matter what youre doing Since this is just basically a ADS1115 on a breakout board it can be connected to nearly any device that supports I2C Im using this to measure the voltage across a shunt to determine how much current is being drawn Since this is higher resolution that the internal DAC on my MCU I can get a much more accurate reading Based on my research of different DAC ICs this seems to be one of the better ones and I can recommend it

Been using in a project for a few months now have not encountered any issues Good value

Most microcontroller boards have analog inputs which are digitized internally This provides a very convenient was of monitoring the output of many types of sensor device These onboard analog to digital signal converters typically have a 10bit digital resolution which provides an output count range of 01023 A few boards use 12bit 4095 count range but if higher resolution is wanted an external ADC board will be neededThis development board is based on the ADS1115 ADC integrated circuit This multiplexes 4 separate inputs that can be read and converted to digital values The digital results are communicated to an external MCU through an I2C interface This interface is very easy to connect to a typical MCU such as an Arduino only 2 wires are needed plus ground and power The 16bit resolution will give an output count range of 065535 which is more than enough for most applications One concern about high resolution ADC systems is that electrical noise can become significant in the digital domain and a few bits of precision can be easily lost High precision requires low noise or else theres not a lot of point in doing itThis product from ShillehTek appears to be wellmade All parts are already soldered onto the board including the pin headers for connection to a pushpin breadboard The board appears to be generic and I see other vendors seem to be offering this board I used the Arduino IDE to test this board with an Arduino Nano and a photoresistor module see photo I used the Arduino library ADS1X15 written by Rob Tillaart The device worked very nicely I was particularly impressed with how much could be configured for this ADS1115 chip gain data rate voltage range differential mode etc etc The signals were nice and clean and with the inputs shorted a stable value of 3 counts was seen There was very little noise apparent The light sensor circuit worked well I could tweak the settings until I got the best quality dataThe main limitation for me with this device was the fairly slow sampling rate maximum 860HzAt a current price of 849 its reasonable value for a 4channel 16bit ADC

Tested with ESP32Arduino using the Adafruit ADS1x15 library Works well in my use case a shunt resistor where micro voltage readings are necessary I am measuring 5v analog signals with a 33v processor using a level shifter on the I2C lines with better accuracy than can be obtained with the ESP32 ADC inputs There are huge advantages to the level of accuracy that these chips are capable of over typical onboard 12 bit ADC and being available over I2C means you can have a nearly infinite number of channels however if you want more than the 12 channels possible with the pinned addressing configuration you will unfortunately have to multiplex

Like other boards by upandcoming seller ShillehTek this board takes a very common jellybeanclass SMT surface mount technology breadboard adds necessary passives to make it usable and brings it out to 254mm100 posts so those of us with aging eyes jittery hands or even just the hobbyistprofessional that wants to breadboardperfboard up a prototype with DuPont cables those temporary flexy wires and where you can attach meters and scopes for testing quickly and easily before committing to soldering anything down or putting boards into production This makes this class of board handy for both the seasoned pros that just dont WANT to mess with SMT and for inexperienced where attaching cables measuring results and experimenting is a key part of the learning processI did take a look at this board and while the PCB appears to be professionally wave soldered the connector was done by gasp a human Unfortunately the human left flux on the board so there is some risk of oxidation and yes rusting even if kept dry unless we get after the board with a toothbrush pro tip use your brothers and alcohol or an ultrasonic cleaner to float out the rosin I didnt dock a star for this because this is somewhat common in boards of this class the posts are added later because the plastic meltable base goes on the parts side where the machine has added parts and splashed solder over them to melt into placeNo doc is provided but the silk screen is marked Data sheets and example code are available in common libraries and OS driver collections ranging from Arduino to Nuttx to ZephyrThis chip is a member of a family of six ADS1013 14 and 15 have twelve bit resolution ADS1113 14 and 15 have sixteen bits This i2c component has only four registers and two of them are the threshold on write and data on read so while configuration isnt quite trivial its far from a complex driver to write even if you do have to roll your own The data sheets just LOOK scary its not complicatedThe part is well known in the industry because of its accuracy Its reasonably priced and it offers a 16 bit resolution when some commodity microcontrollers offer only 10 or none at all The justifications for moving to an external ADC even if your referred SOC has one includes like Needing more inputs than are available in the System On Chip Needing better precisionaccuracy The included device SOCs may arrive uncalibrated or have design issues making one or more of the buckets under or over represented Some demanding designers consider the ADC for Arduino and ESP32 in particular to be unusable in some applications Needing fieldreplaceable units Sometimes a design issue can leave ADCs exposed to the elements Replacing a socketed SOC may involve the loss of data andor requiring reprogramming Replacing a socketed external one is grabandgo because there is no data stored on this boardIve used the ADS1115 before between two resistors in a voltage divider configuration to let me monitor the current voltage Worked greatIts a good chip mounted onto a good board at a good price Use it to go make something good

This is a nice presoldered package of an ADS1115 Cost is higher than if you tried to build your own but the quality of the build is reasonable and there is the convenience of having it prepackaged If you look up ADS1115 there is plenty of documentation for incorporating it into your next project Overall this is a a decent development module

Used this ADS1115 in a battery charger project for a solar panel and it works great Very accurate and easy to use

I am trying to build a GSR galvanic skin response monitor using an Arduino I got the SHILLEHTEK ADS1115 convertor board to prototype the project and convert the signals from the hand sensors to digital input and then into the display circuitry Initial results look good but I need to do a lot more work on the code

This analog to digital converter works well and comes at a good price I highly recommend it

You ever get a little tipsy and start having great ideas and ordering things Yeah well thats what happened here I didnt even know what exactly I was looking at when it arrived at my door Other than a well made and packaged product But did it work After checking my order history it became clear I needed an analog to digital converter for a bright idea I had that lonely and peaceful night So I used it Worked like a charm

I got this for my Arduino projects Its a basic Texas Instruments ADS1115 analogtodigital converter chip with I2C and ability to change the I2C address depending on whether the ADDR pin is connected to VDC or GND Instructions for changing the address can be found on the ADS1115 data sheet Example code is is widely available with an internet searchThe board works as described the soldering is neat and clean and its a good but not great price

The ADS1115 is an analog to digital converter ADC IC that has 16bit resolution with 4 singleended or 2differential analog inputs and an onboard programmable amplifier PGA It may be used with microcontrollers like Arduino Raspberry PI ESP32 etc The 16bit resolution is much better than most microcontrollers builtin ADCs if such are available which often are 10bit onlyIf you are measuring small signals such as from a Wheatstone bridge the high resolution of this breakout board allows for enhanced accuracyIve shown photos of my basic test setup using an Arduino UNO microcontroller to control the ADS115 breakout board I recommend the Arduino libraries from Adafruit for use with this board They have free libraries for Arduino C and Circuit Python The example code available from Adafruit is complete free and fully tested as are the wiring diagrams for use with a variety of microcontrollers

I plan to use this AD converter to monitor the outputs of some current sense transformersI built a simple breadboard circuit to test the module An ESP32 development board was attached to the ADC module I used a simple resistor divider to provide a sample voltage I used a few different resistor values to vary the voltage for the testingFor the ESP32 code I was able to use the library written by Adafruit It was able to read this module just fineMy final circuit will include some protective devices and buffering but the module tested out fine

Received this item and immediately tried it out with my Arduino kit This items gives very good reading There are plenty of examples and writing diagrams out on the internet if you dont know what to do with it Super compact I would recommend this product

This ADC1115 provides a more precise 16 bit conversion more precise than the 12 or 10 bit ADC found in Raspberry or ArduinoThis product is simply a breakout board of the ADC1115 chip without manual specification url tutorial and the like There is no additional jumper wires as well Also there is no pro gain amplifierSo customers need to research on their own on the usage connection etc Fortunately it is a simple and straightforward chip and infomation can be found easily online

Much higher resolution and accuracy than the ones built into Arduino Easy to interface with I2C Easy to use with available librariesClean board Soldered properly

I appreciate the convenience of the presoldered board especially for prototype work or small projects I have nothing bad to say about this board everything works as it should with nice clean soldering of all the pins

I made a little solar powered camera for taking pictures of birds in my yard I want to be able to measure environmental conditions in the camera enclosure that will be exposed to the Arizona heat and Sun My intention is to have the data logged in the cloud with an alert if conditions exceed a certain threshold This will help me monitor the environmental extremes the circuit and battery are exposed to and recognize if any moisture gets into the enclosureI was getting weird readings using the BME280 by itself so I am hoping this will reduce some of the signal spikes and filter out some of the noiseI tested this module and I am able to send and receive data now I just need to get it all wired up and out it in the SunThanks for soldering

The part works as expected I am very fond of the ADS1115 its great to have the PGA and the differential if you need them inputsOne of the caps is askew and looks like it was moved during the reflow processI2C comms work fineGet the TI datasheet and youll be fine There are already a lot of libraries available for different platforms Arduino ESP32 STM32 etc But build your own and youll have more funFYI this is in a DC Electronic Load circuit I have multiple singleended inputs coming in

Looks great and works as expected

Solid product and works as expected Thanks for soldering

Worked great with my temperature monitoring system