Advice Reqd For Tools.

[drogon]

BigEd wrote:

(USB-C allows negotiation of higher voltages, for power delivery (PD) up to 65W)

And for hobby projects, there are many little modules that have a USB-C socket and can provide various output voltages - assuming the input USB-C is capable - they are typically called "decoy modules" and some can have their output voltage changes by setting links or soldering pads.

e.g. modules like this https://www.ebay.co.uk/itm/295636499200

but once you have the keywords to search for there are many options out there and this can make powering hobby projects a breeze.

You do need a good USB-C mains unit though - the cheaper ones just supply 5v but the full PD compliant ones can supply up to 48v at 5 amps.

As an aside, it's often reported that the mains units have more computing power inside them than the Apollo guidance computer...

-Gordon

[barnacle]

drogon wrote:

As an aside, it's often reported that the mains units have more computing power inside them than the Apollo guidance computer...

Yes, but imagine the length of the mains cable...

Neil

[BigDumbDinosaur]

GARTHWILSON wrote:

BigDumbDinosaur wrote:

Wondering how one gets 65 watts out of a USB port.  At 5 volts, you’d need 13 amps flowing through those skinny little wires.

The USB spec. allows the master and a device that has the needed intelligence to negotiate a higher voltage and current limit.

Shows you what I know about the not-so-universal universal serial bus. 

Quote:

How many masters could do it though?  Why not just have the iron plug into the mains, or at least use a wall wart.

That would be my question as well.  Presumably everyone who is a member here has at least one receptacle by their electronics bench.  Lotsa watts to be had there for heating soldering irons, arc welding, making tea, etc.. 

[BigDumbDinosaur]

barnacle wrote:

drogon wrote:

As an aside, it's often reported that the mains units have more computing power inside them than the Apollo guidance computer...

Yes, but imagine the length of the mains cable...

Neil

...not to mention the problems with the cable getting tangled up with airplanes, helicopters and nut cases hang-gliding off precipitous slopes.