TheBackShed.com

Forum Index : Microcontroller and PC projects : 10 GHz beacon monitor

Author

Message

vk4tec

Senior Member

Joined: 24/03/2012
Location: Australia
Posts: 239

Posted: 02:07am 13 May 2016

Copy link to clipboard

Print this post

Hello

I am helping a friend monitor a 10 GHz beacon

He would like to send data from the pole to the ground.

I am thinking a maximite and an RF module ( easy radio )

8 Analogue voltages and maybe a wind speed PPS

Ideas ?

- Andrew -

Andrew Rich VK4TEC
www.tech-software.net

lew247

Guru

Joined: 23/12/2015
Location: United Kingdom
Posts: 1702

Posted: 06:17am 13 May 2016

Copy link to clipboard

Print this post

HC-12 433 Mhz module, if short distance is what you need, it's simple serial data at any baud rate you require
The serial is TTL and it works direct from Micromites serial ports at 3.3V although don't power it from a micromite pin direct, it would draw too much current. You can power it from 3.3V or 5V whichever you prefer but the serial data must is TTL only.

If you want long range then probably a LORA module would be best, these are reliable over 1KM range

The voltages you can do easily from the Micromite and the wind speed PPS is easy also, all you need is some kind of anemometer with a reed switch and count the number of clicks per second then work out the speed in KPH or MPH whichever you prefer.
lots of instructions for making anemometers online including how to work out the speed from the diameter/circumference of the cups used to capture the wind.

On the anemometer I used on my weather station (still in progress not ready to give all details out yet)
This might help you

Const WindFactor=0.4166666666666667 'unique to each enenemeter type
To find your windfactor turn your anenemeter upside downso the cups are on a piece of paper, using a pen at the end of one of the cups turn it one complete turn not moving the pen, and you should have a circle. calculate the circumference of the circle made by the rotating cups by measuring the distance around the circle that they make (using a tape measure or a piece of string you can measure with a ruler). Then convert this to miles by dividing the number of inches by 12 to get feet and then dividing that number by 5,280 (the number of feet in a mile). Multiply this number by rpm. Finally, divide your product by 60 (to convert minutes to hours) and you will have an approximation of the velocity at which the anemometer is spinning (in mph), although this does not take friction in to account. (to get Kph measure in Centimeteres then divide by 160934 instead of 5280)

If you have one reed switch closure per revolution then its a simple math calculation to get the speed.
Edited by lew247 2016-05-14

Print this page

To reply to this topic, you need to log in.