I’m building an anemometer to measure wind speed. I’m building the typical 3 cup style anemometer, and using a hall effect sensor (digital, non-latching) to trigger an arduino (or esp8266). It’s a open collector unit (output pulls low when triggered with a magnet), and therefore uses a 10k ohm pull up resistor, or use pinMode(inPin, …
The 18650 Lithium Ion Battery is becoming the go to battery for rechargeable projects, from microcontrollers to skateboards and ebikes. We have been powering our Raspberry Pi, Arduino, and Ham Radio projects with them. Although soldering the tabs on these batteries have been difficult (and damaging) in the past, there are now solderless interlocking kits …
Tutorials for adding a LCD to a Arduino are all over the net. It’s pretty simple, and I2C makes the wiring even simpler, and libraries prevent complicating the code much. However, adding a LCD to a ESP8266 is not as common, and there is much misinformation posted about logic levels, and what not. So here …
Here is an easy project using a Echo Dot (Alexa) to control my ESP8266. I give it simple commands (Alexa, lights, off) and the command shows on the LCD screen attached to the ESP8266. Actual relays will be the next step to attach. The project is based on the Adafruit tutorial at https://learn.adafruit.com/easy-alexa-or-echo-control-of-your-esp8266-huzzah/overview with LCD and …
One of the things I find myself making often, is plastic (plexiglass) control panels. I still have not made my desktop cnc yet, but when I do, I can stop drilling these panels by hand. Mounting LED’s is always a task, and I started using these very nice chrome LED holders. They come with a …
I just installed FreePBX, a linux based open source phone system at work (12 SIP trunks, 40 extensions), and thought, why not a home / small office unit based on a Raspberry Pi? The Raspberry Pi can easily handle multiple SIP trunks, and enough IP phones for the whole family / small business to have …