Most commented posts
- MicroPython WebREPL on Android — 23 comments
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- Arduino as a Network Monitor — 18 comments
- LM317 to output 3.3 Volts — 15 comments
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Author's posts
Jul 28 2020
WebRTC Screen/Video Sharing
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 30 2019
A Wireless WEB Server on an ESP8266
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
STM32F103C8T6 Solar Power System Monitoring
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
Solar Power System Monitoring with an Arduino
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. …
Nov 28 2019
How a Web Server on an STM32F103C8T6 can be used to control a Relay Switch
Here is the circuit showing how a Web Server on an STM32F103C8T6 can be used to control a Relay Switch: The Fritzing code used to create that diagram/image can be downloaded here. An ENC28J60 ethernet module is used to connect the STM32F103C8T6 (BluePill) to a network. Here is the source code for the sketch to …
Aug 20 2019
SN75176 RS485 Communications between two Arduinos
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
Use An Arduino Leonardo and a Button for a USB Foot Pedal
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
RS485 Arduino Communications
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
Nuttx on the STM32F103C8T6
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
Turn an STM32F103C8T6 (BluePill) into an STLink Programmer
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 …
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