Dec 30 2019
This is a short post which shows how to create a wireless WEB server on an ESP8266. It uses a microcontroller, in this case an STM32F103C8T6 (BluePill ) to send commands and control the ESP8266 Here is what the wiring looks like:. You can get the Fritzing code for this image here. …
Dec 27 2019
If you read my last post on Solar Power System Monitoring with an Arduino you might be wondering if that circuit could be enhanced a bit. Say, change the LCD to an OLED and add wireless (WEB server) capability? I was not happy to have to go out and look at the device when I …
Aug 20 2019
Previously, I wrote about RS485 communications between two Arduinos using a MAX485 IC. The link for that post is HERE. It showed one Arduino as a tranmitter and the other as a receiver. This post is very similar, however, I am using a different IC, the SN75176BP. This post is about SN75176 RS485 communications between …
May 20 2019
It is possible to use an Arduino Leonardo and a Button for a USB Foot Pedal. Here is the story on how one was built. A long time ago, my daughter used to transcribe audio cassette tapes using a transcribing machine. It had a nice foot pedal to start, stop and rewind the cassette tape. …
Jan 31 2019
There are various ways for two Arduinos to communicate information. A common way is serially via RS232. However, RS232 has distance limitations. If there is a need to serially communication over a longer distance consider using RS485 instead. A couple of MAX485 ICs can facilitate RS485 Arduino communications over that longer distance. Two MAX485 ICs …
Aug 28 2018
The Arduino folks just came out with the Arduino Command Line Interface (CLI) : Announcing the Arduino Command Line Interface (CLI) A while back, I wrote about the Arduino-Builder which is what the Arduino IDE invokes behind the scenes to compile the sketch. (That post is here.) Now, with the Arduino Command Line Interface, everything …
Mar 16 2018
To motivate and engage sales people, have a big red button to push when a sale is made. They push a button and play a video. Something fun! Add flashing lights for extra effect! Here are two different means to accomplish this. One solution involves an Arduino UNO serially attached to a PC running the Windows OS. …
Sep 02 2017
I built another handy circuit to ‘house’ a 4 character 7 segment display. It looks like this: Basically it just ‘breaks out’ the 16 pins of the display with two 8 pin female headers. Pins 1-8 are connected to the header at the bottom and pins 9-16 are connected to the header at the top. …
Aug 28 2017
My latest project involves collecting data from a number of sensors connected to multiple Arduinos. I2C (or 2-wire) is a perfect fit for this project because I needed an easy way to connect the Arduinos and aggregate the data. With I2C, I can have one Arduino as the master and several other Arduinos as slaves. …
Apr 24 2017
For many Arduino projects, there is a need to display information graphically or display more text than what fits on a 16×2 LCD. For that need, consider using SSD1306 OLED Displays. SSD1306 refers to the controller or driver chip for the display. OLED or Organic Light Emitting Diodes refers to the dot-matrix graphic display system. These …
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