Be prepared. Use the setup routine to setup your code ever time your IoT controller boots up. Read more
Tag: Arduino
Synchronized Switching Relays in Action
So, here it is. My dual channel antenna switch built and working in the lab. A project of synchronized switching relays. Read more
Diversity Reception Antenna Switch
My first attempt failed. My second attempt to build a diversity reception antenna switch will work! Here goes. Read more
NodeMCU Expansion Options for IoT Control
NodeMCU expansion solutions provided you with great wireless control of your projects and multiple control pins at low cost. Read more
Arduino Sleep Modes and RFI
Several folks suggested that I try putting my Arduino to sleep in an effort to reduce RFI with my relay controlled antenna switch. So, here are some experiments with Arduino sleep modes. Read more
Reducing RFI with PCF8574 GPIO Expander Board
I was able to use a PCF8547 GPIO Expander Board to reduce but not eliminate RFI from my Arduino. Here’s how that works. Read more
Tracking Down Antenna Switch RFI Ingress
Well, it’s settled. I have a major antenna switch RFI ingress problem. As much as 30 dB on some frequencies. Sigh. Read more
Homebrew Radio Switching Board
I am moving a large part of my shack to a wall mounted radio switching board. My goal is complete remote relay switching of antennas for my diversity receivers and loop array. Read more
Arduino Controlled Relays Module
You can use these Arduino controlled relays modules for all sorts of local or remote switching for your radios, antenna and other things. Read more
Arduino Returns to My Maker Workbench
After four years absence, Arduino returns to my top of mind. Time to do some more remote motor control projects. Read more