Oct 15 2014
With just a few sensors, one can determine a lot about the weather. The BMP085 can be used to sense barometric pressure and temperature and the DHT11 can be used to sense humidity and also temperature. Here is what they look like attached to a mini breadboard: …
Oct 10 2014
Animals such as bats and porpoises use ultrasound for locating prey and obstacles. If you have an electronic device that needs to sense distances from objects (like a robot or an automatic door opener) you might consider using an HC-SR04 Sensor Module. No one can sneak up on you with a couple of these and …
Oct 06 2014
My children bought a present for me recently (yes, another birthday, I really am getting older 🙁 ). It is an ESP8266 Module which is a self-contained [IoT] Wi-Fi networking solution. Here are pictures (with the pins labelled): My module comes from Elecrow.com. Since this …
Aug 09 2014
A PIR or Passive Infrared module is really fun to play with. This is what they look like: They are basically a motion detector and are called ‘passive’ in the sense that these devices do not generate any energy for detection purposes. They work entirely by detecting the energy given off by other …
Aug 09 2014
If you’d like to wirelessly attach your Arduino to another device (such as a phone or tablet) via bluetooth, I’d recommend the serial bluetooth module from Elecrow.com. Here is what they look like: The module has firmware from BOLUTEK. The PDF document with all of the available BOLUTEK commands is BLK-MD-BC04-B_AT COMMANDS . I …
Aug 07 2014
I picked up a couple of these modules: from Elecrow.com so I could attach (communicate with and control) several of my Arduinos through a LAN connection. The main chip is the ENC28J60 from microchip.com. These modules are better than an Ethernet Shield in that you can easily attach these to any Arduino and they …
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