Monday, April 22, 2019

Project of the Month for May 2019

Project of the Month

This month's project is the ESP8266 Weather Station Kit by Ideaspark!

Why not buy one now and build it along with me? Here's a link via my Amazon Associates account. Purchase it here and help me support My Parts Chest website and App (available on Google Play and the Apple App Store).

ESP8266 Weather Station Kit with DHT11 Temperature Humidity BMP180 Atmosphetic Pressure BH1750FVI Light Sensor 0.96" OLED IIC YellowBlue Display for Arduino IDE IoT Starter(Guidance Document Included)


  • ✔️The weather station uses the ESP8266-12E to obtain data from the Internet: time of a city, weather data and forecast information for the next 3 days, scrolling on the SSD1306 OLED Display; the device can switch to display data from any city in the world - maybe your relatives or friends live there
  • ✔️The device uses sensors DHT11, BMP180,BH1750FVI to collect temperature, humidity, Atmosphetic Pressure and light data. The weather station reads data indoor via sensor every 5 seconds and uploads it to the Internet every 60 seconds.You can see real-time data charts from your phone or computer.Of course you can modify the code to implement different functions
  • ✔️【ESP8266】:CP2102 chip inside,Micro USB,4MB flash,full I/O port and wireless 802.11 supported IOT platform Arduino compatible. 【DHT11】 Sensor: A digital signal output with a calibrated temperature and humidity combined sensor.The simple communication protocol greatly reduces the programming effort required
  • ✔️【BMP180】:high-precision, small size, ultra-low power 3μA pressure sensor.Its performance excellence, the absolute accuracy of the lowest can reach 0.03hPa.Can directly through the I2C bus connected with a variety of microprocessors.Pressure range: 300 ~ 1100hPa. 【BH1750FVI】:Digital Light intensity Sensor.Direct digital output, complex calculation is omitted, omitting calibration. 【OLED Yellow Blue Display】:0.96" SSD1306 128X64 Yellow&Blue OLED LCD Display with I2C IIC SPI Serial
  • ✔️We have prepared weather station hardware.And 50M guidance manual,demo code,burning tools,necessary class libraries already on CD-ROM disk.or contact us on Amazon,we will send download link to you.Package List:1 x Esp8266-12E,1 x DHT11,1 x BMP180,1xBH1750FVI ,1 x OLED Display,2 x breadboard,20 x dupont cable,1 x usb cable,1xGuidance document CD-ROM disk

Friday, March 1, 2019

Project of the Month for March 2019

Project of the Month

This month, I chose a robotic arm kit from MicroBotLabs. 

Why not buy one now and build it along with me? Here's a link via my Amazon Associates account. Purchase it here and help me support My Parts Chest website and App (available on Google Play and the Apple App Store).

ArmUno 2.0 MeArm and Arduino Compatible DIY Robot Arm Kit With MeCon Motion Control Software and Arduino Source Code Via Download Link


  • Robotic Arm Kit includes Servo motors, Structural pieces and all Fasteners needed for assembly Plus MeCon Software and Arduino Source Code Via Companion Web Site and Download Links.
  • Windows PC Motion Control Software Allow you to Teach and Record Motion Paths for Automatic Playback
  • Make your own desktop size 4-axis parallel-mechanism Mini Industrial Robotic Factory Arm!
  • This kit features a Companion Web Site full of information resources and makes a great educational resource kit for robotics and micro controllers.
  • Precision Laser Cut Parts Require only a Screwdriver to Assemble and an Arduino Micro Controller for the Servo Motor Logic - *(Screwdriver and Arduino not included)* 

Thursday, February 28, 2019

IoT HVAC Monitor

I built this project in July of 2018 and posted it on


IoT HVAC Monitor

Monitors the fan speed, on/off cycles, temperature, and humidity of my HVAC system and posts data to

Parts used:
I built this project for two reasons. (1) I've been looking for an excuse to play around with IoT, and with the ESP8266 in particular. (2) My electric bill has been steadily increasing and I wanted to see how often my HVAC system was cycling on and off (and at what temperature).
I figured I could monitor on/off cycles by attaching a small DC fan motor to the return air grill. When the HVAC unit turns on, the airflow will cause the fan to turn; acting as a generator. I can then read the voltage generated by the fan motor by connecting it to an analog input pin on the ESP8266.
I thought I might also be able to determine the fan speed by the variation of the voltage generated. And I might as well measure the temperature and humidity while I'm at it.
I had an old, non-working power supply from a Dell PC in my junk box, so I decided to salvage the fan for this project. I hot glued magnets on the four corners of the fan, so I could easily attach it to (and detach it from) the metal return air grill.
For my processor, I chose the SparkFun ESP8266 Thing because it includes a built-in LiPo charging circuit. I mounted the Thing to the fan using hot glue and a small breadboard. Then, I wired up the fan to the ADC analog pin and GND. I also added a 1K pull down resistor to make sure the analog pin read zero volts when the HVAC unit was off.
I glued a LiPo battery to the fan as well and plugged it into the Thing.

I connected the DHT11 to the SCL pin (which also serves as digital I/O pin 14) to read temperature and humidity.

Once I put everything together and uploaded my sketch, I snapped the device to my return air grill and kicked on the A/C.

After running it for a while, I logged into and grabbed some results!

As you can see, the on/off cycles look nice and symmetrical, but my voltage readings jump around a lot. I probably need to clean that up a bit with a rectifier or some such. The temperature and humidity readings give me a good idea of when it's cycling. All I have to do now is find out how often a "normal" A/C unit should cycle and I'll be good to go! 

The Arduino code is posted on Hackster along with the project