i_soul wrote:You made my day Dave as I was wondering if I can easily find a couple of these DIY micro USB connectors! One last question, which is somewhat irrelevant to powering a RPi 3 but it has to do with powering stuff using an UBEC.
UBEC's output is at minimum 5V 3A. Could this be used to power stuff like a RPi Zero or pHATs that take external power (like motor controlling pHATs)? Could the 3A output potentially damage a RPi Zero?
The UBEC can supply up to 5A peak (not continuously) but can supply 3A continuously - Current is "requested" by the device being powered. For example if the Pi "wants" 1A then the UBEC will give it 1A, if the Pi then wants 1.5A the UBEC will give it a bit more etc... Unlike voltage, that is "given" by the power source. (This is just a very basic explanation)
You can use the UBEC to power any 5v device you want that won't draw more than 3A continuously. You will need to make sure that the power input to the UBEC can handle the power output from the UBEC though.
Power = Current x Voltage
Max Output Power = 3 x 5 = 15W
The UBEC has about a 90% efficiency rating so you'll need an input power of about 16.67W
These are just rough values and the reality is you will get a bit of a voltage drop (depending on the device you are powering), so you will want to up the input power a bit.
Hope that makes a bit of sense