It was around 7 meters regardless of supply voltage.
I also verified that the control range was not affected. That means I can use the Raspberry Pi 3.3V output to power up the radio board. I tested it using an adjustable power supply, and found the minimum voltage that made the board function to be 2.3V. It would make recharging the submarine easier, as there would be only one battery on-board.īut does the radio board work with voltage other than 3.7V it it designed for? Now I wanted to remove that and use power from the Lego battery box. In previous submarines I’ve supplied the radio board with a LiPo battery.
Here is a closeup of the board from both sides, after I removed the big green cylinder that was a LiPo battery.
