Yaesu WiFi TX and Voltage Sensor for Home Assistant

MadPsy : May 14, 2021 17:52 : Electronics, Radio

A simple and quick project for detecting when a Yaesu transciever is transmitting and feed that status to Home Assistant to then perform actions. This can be used to, for example, automate killing the power if the radio gets stuck TX’ing when using automated digital modes software such as WSJT-X remotely. It can also measure the supply voltage, which is always useful information to know, especially when operating remotely.

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FT8 DMC Awards

MadPsy : May 14, 2021 09:33 : Radio

All my FT8 Awards from

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FT8: How to configure WSJT-X and useful tips

MadPsy : July 18, 2020 13:44 : Radio

At almost 1000 QSOs with FT8 using WSJT-X I thought I’d share a quick set up guide and some tips.

I won’t go into TX here, only RX for now.

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Calculating performance of outdoor wireless network links

MadPsy : January 15, 2017 14:07 : Networking, Radio

This article contains information on how to calculate the operating margin of a wireless 802.11 network using a known distance between the two points.


I wrote this quite a while ago and although the throughput of wireless links has dramatically increased the basic theory still applies. Of course we now have 5GHz available, which is very useful for this application. You should be able to substitute ‘f’ for 5000MHz and the maths will still work.

You can now get a 150mbps PTP link over 15km using equipment that costs £160 for both ends – that’s the entire cost of the system (minus a couple of poles and brackets). Crazy value for money when you think about it. The Ubiquiti NSM5 NanoStation is one such example. The Ubiquiti product range is pretty impressive to say the least. The NSM5 seen below is the big brother of the LOCOM5, which at £125 can still do 10km at the same rate and are around half the size.



If you are considering an outdoor wireless link, give this article a read so you understand how high above objects you need to mount your shiny new kit!

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FM Transmitter with Raspberry Pi

MadPsy : October 13, 2015 22:52 : Electronics, Radio, RaspberryPi

When I first read about this I thought it can’t be real but it is. The Raspberry Pi can be used as a stereo FM transmitter. It’s a pretty nifty discovery which uses a GPIO pin on the Pi to generate spread-spectrum clock signals and outputs FM Radio energy.

Radio Pi FM

There’s no point in me rewording what has already been written so here is the explanation from the guys who discovered it over at »

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