Jul 28 2020
As many readers of this site can tell, I am a bit off topic with this article. None the less, I think those same readers will find it useful. The topic is WebRTC Screen/Video Sharing and shows how to communicate with another person (peer to peer) via video and audio using a Web browser. This …
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 …
Dec 08 2019
Sometimes, people wonder about the practical side of using an arduino. I do get asked what is the real use for some of the articles I post here. Are these ‘gadgets‘ just toys or do they have a practical use? Most people who ask though, are not that familiar with arduinos or microcontrollers in general. …
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 …
Jan 17 2019
Wouldn’t it be C 🙄 🙄 L to have a Linux prompt on the STM32F103C8T6. Not likely, however, Nuttx on the STM32F103C8T6 is about as close as you will get. Nuttx is a RTOS which runs on a wide range of microcontrollers including the STM32F103C8T6. To compile Nuttx for the STM32F103C8T6, a development environment needs …
Sep 24 2018
It is relatively easy to turn an STM32F103C8T6 (BluePill) into an STLink programmer. All that is needed is a copy of the STLink firmware and a means to flash it. Do a search for STLinkV2.J16.S4 and download it. Flash that binary file into the STM32F103C8T6. See my other post HERE on the STM32F103C8T6 as it mentions …
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 …
Apr 16 2018
I recently created an STM32F103C8T6 DIY programming cradle. Here is what it looks like: It comes in handy when you need to program a bunch of STM32F103C8T6s. (Note: I made a similar ‘cradle’ for programming bunches of ESP8266s’. Read about that here.) A standard USB to serial converter is attached to the 6 pin header …
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. …
Feb 27 2018
MicroControllers are digital devices and usually do not have built in digital to analog converters (or DACs) to output an analog signal. Some, however, do have analog input. For digital output, the voltage is one of two values. Output voltage is either 0 volts or near equal to the voltage source (‘off’ or ‘on’). Using a technique …
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