Teensy 4.1 USB Host cable

Fozz said:
Hi,

This is the Teensy 4.1 USB Host cable :
https://www.sparkfun.com/usb-host-cable-for-teensy-4-1-and-teensy-3-6.html

Sparkfun does not have them in stock yet.

It has 5 wires, 2 are ground.

Sparkfun does have a 4-pin variation, with one ground:
https://www.sparkfun.com/panel-mount-usb-to-4-pin-female-header-cable-6.html

Question: could this 4-pin be used instead of waiting for the official 5-pin version?

Thanks,
Bill
Click to expand...
It will NOT have the 5V pin.
Search for Teensy Host connector, a number of suppliers have them...Pimoroni, protosupplies etc.
 
BriComp said:
It will NOT have the 5V pin.
Search for Teensy Host connector, a number of suppliers have them...Pimoroni, protosupplies etc.
Click to expand...
Doesn't hurt to get the right cable, yes.

But where do you see that the 4pin connector is missing the 5V pin? There are two GND pins in the 5 pin connector where you can omitt one. The 4pin connector should also work.
 
I agree with TomChiron and jmarsh that the 5v line is one of 4 pins.

This Teensy page shows the USB Host 5-pin configuration:
https://www.pjrc.com/teensy/card11b_rev4_web.pdf

+5v
D-
D+
GND
GND

Pages like this show the USB 4-pin configuration:
https://www.nextpcb.com/blog/usb-pinout

+5v
D-
D+
GND

I didn't do enough research to find out what the 2nd GND is connected to. Maybe it is connected to the USB enclosure. Maybe with the 4-pin configuration, ground is connected to the ground pin AND the enclosure.
 
That's more or less how it is. With the 5-pin plug the second GND is usually connected to the shielding inside the cable and the ground shield around the plug.
 
I have moved on to using the DataPro cable; originally because they have accurate dimensioning info on their website, which I needed to be able to design a front panel without costly errors; but also it seems to be a well made product, they are helpful, and there is a 3D model available. One downside (from my perspective) is that the mounting bolts are US imperial rather than metric (but no big deal).

www.datapro.net

USB Panel-Mount to 5-pin Socket -- DataPro

USB Panel-Mount to 5-pin Socket
www.datapro.net www.datapro.net
 
Nantonos said:
I have moved on to using the DataPro cable; originally because they have accurate dimensioning info on their website, which I needed to be able to design a front panel without costly errors; but also it seems to be a well made product, they are helpful, and there is a 3D model available. One downside (from my perspective) is that the mounting bolts are US imperial rather than metric (but no big deal).

www.datapro.net

USB Panel-Mount to 5-pin Socket -- DataPro

USB Panel-Mount to 5-pin Socket
www.datapro.net www.datapro.net
Click to expand...
Easy enough to put an M3 tap through them.
 
And you would tap an existing incompatible screwthread? Which might be larger? And not wrench the insert out of the plastic in the process?
 
Yes,

no.

I give advice based on my own personal engineering experience over five decades. It is up to you what you do with it. All examples of these that I have used take an M3 nicely. If you have one which is larger than normal, then tap M3.5 or M4 as required.
 
MarkT said:
And you would tap an existing incompatible screwthread? Which might be larger? And not wrench the insert out of the plastic in the process?
Click to expand...

When using a tap, it is important to keep backing it out to clear the swarf as it cuts and a smear of grease will keep the swarf together. There should be no risk of destroying the insert unless you go at it like a Gorilla!
 
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