My first OpenGD77 project
Posted: Fri Mar 06, 2020 9:39 pm
Hello,
Ali Kemal TA5AYX from Turkey.
My OpenD77 project is over and I have been using it for 1 month without any problems.
I transformed it into a radioddity metal box and send cool air to this box for cooling with a turbo fan and heat sensitive sensor circuit and fan speed control depending on the heating rate. When it is cold, when the fan speed is low, it increases according to the fan speed and the heat ratio. In the box cover, two 40mm fans are controlled proportionally with the internal temperature control.
I used raspberry pi3 and put coolers on it.
I made the energy source with 12v 5 amp and also used 7.8v regulator for Opengd77 and 5v regulator for raspberry.
Except for the 220, it can work uninterruptedly with automatic switching with 12v battery behind the terminal.
I used ferrite filters in the power line and in-box cables.
I use X300 antenna and 15 meters cable 9 meters above ground level. I had the chance to use it 17 km away from my house, for now, I could not try it from farther.
Over time, I will have a chance to try from more distances.
My 2 friends can connect and use through this system.
I wrote with Google translation, sorry for the mistakes.
I will share some photos and videos from the working phase and the testing phases.
All DMR amateur radio users from Konya, Turkey greetings of love.
TA5AYX 73's.
Ali Kemal TA5AYX from Turkey.
My OpenD77 project is over and I have been using it for 1 month without any problems.
I transformed it into a radioddity metal box and send cool air to this box for cooling with a turbo fan and heat sensitive sensor circuit and fan speed control depending on the heating rate. When it is cold, when the fan speed is low, it increases according to the fan speed and the heat ratio. In the box cover, two 40mm fans are controlled proportionally with the internal temperature control.
I used raspberry pi3 and put coolers on it.
I made the energy source with 12v 5 amp and also used 7.8v regulator for Opengd77 and 5v regulator for raspberry.
Except for the 220, it can work uninterruptedly with automatic switching with 12v battery behind the terminal.
I used ferrite filters in the power line and in-box cables.
I use X300 antenna and 15 meters cable 9 meters above ground level. I had the chance to use it 17 km away from my house, for now, I could not try it from farther.
Over time, I will have a chance to try from more distances.
My 2 friends can connect and use through this system.
I wrote with Google translation, sorry for the mistakes.
I will share some photos and videos from the working phase and the testing phases.
All DMR amateur radio users from Konya, Turkey greetings of love.
TA5AYX 73's.