In order to power an airband radio I have found some curious voltage specifications, exactly 7.2V, and the input we have from the motor is 12V, therefore, we have had to build our own current regulator.

In the search I found the regulator LM317, essential when you want to obtain currents that are not as common as 5V, 9V, ….. it has three terminals, and is capable of supplying more than 1.5 A in a range of between 1.2 V and 37 V.

Here I leave you the assembly diagram, however, keep in mind that in the diagram the pins of the LM317 are not in the correct physical order, for this reason there is the drawing above the diagram.