Making a simple power distribution hub is easy. However, to make sure things will work and not result to magic smoke, make sure that:
All electronics that will be used for this must have the same voltage (e.g. all 12v or all 5v)
You MUST know the maximum power draw in Amps of all the components that may or will be connected to this hub. Refer to your electronics documentation to get the maximum amp draw and add them all up.
Next, prepare the materials:
Get a UBEC suitable for a) the voltage and b) the maximum Amp draw of all your components. In this example, I’m making a power distribution for my portable FPV ground station which is attached to my transmitter. My components consists of a 7″ LCD, the AV receiver and (soon!) an EzUHF LRS transmitter.. all of which draws a maximum of 1.8A. This means a 2.5A UBEC at a minimum should be enough (it wont hurt if we get something with a higher Amp output). This 12v 2.5A UBEC from HK is adequate for my purpose.
A male XT60 or Deans plug, a servo extension (this is optional in case you dont want to hardwire distribution plugs to the UBEC) and several female JST cables. Of course this assumes that all your components will have JST male power plugs as well =) Anyway, here’s the materials prior to assembly:
Finally, solder them all together making sure that the positive wires are connected to the correct connectors otherwise.. poof! Ok here’s the end product:
Make sure to use heat shrink tubing to insulate soldered connections.
My FPV kit arrived about a week ago, having opted to get the (relatively) humongous 2W transmitter (at 180g) and which does not have any mounting to speak of.. what you get is an aluminum heat sink and perforated steel sheet casing at the bottom.
Some folks insert steel clamps at the bottom, whatever those are they must really be small and almost impossible to find anywhere. My solution was make a custom mounting made out of PVC sheet using good ‘ol used phone cards (or credit cards). The first thing to that needs to be done is to take the screws off the the fan (dont worry they’re pretty much securely screwed in the aluminum heat sink):
The next step is to cut out some kind of base from the phone card, this will be attached and screwed on top of the fan. Dont worry the screws are long enough for a good secure fit. Here’s the end result:
Now this transmitter is ready to be mounted anywhere!