Hi,

Finally getting around to this one on my workbench...

Two Questions on Teensy mounting and audio shield

1. is this the best socket approach.? (see photo below). Starting at the top,??

a. Audio Shield
b. Male/female strip with male headers soldered to Audio Shield
c. Male male pins. The Teensy is sandwich between the strip on top and the upside strip on the audio shield. In this configuration, I would solder the male/male pins to the top of the teensy?
d. Male female strip on bottom, with male being soldered into JACKAL board.

1.?

2. Been staring at the mounting for the Teensy into the main board. In photo 2-11 of Section 2 of the assembly manual (ver 16), there is a secondary set of headers on the inside (one 3 at top and one 5 at bottom) and a cross set of headers (5 pins to the right). The Teensy also has a position for one more pin right next to the usb header, but Figure 2-11 does not show a corresponding socket.?

?

Yet figure2-2 Does not include the headers on the top (neither the 3 or 1 pin and does not include the 5 pin on the right)>

?

I assume that Figure 2-11 is correct? And what about that extra pin that is on the top on 2-11 and just to the right of C10 (On the board it looks like VUSB?) . Should that pin be socketed and connected to the Teensy?

?

Thanks
73
mark
AJ6CU

开云体育

Sounds like i'm at about the same point as you.? I just went thru the pre-testing list and am now at the point of mounting the teensy.

Not sure about "best" but I planned mine a little different.?? Not that I see anything wrong with what you propose.

I'm using male pins soldered to the audio shield.? That plugs into female headers with long male pins on the bottom that go thru the teensy and that the teensy is soldered to those male pins.? Those same long male pins are left long below the teensy and plug into a second set of female headers with short male pins.? Those short male pins are soldered to the JackAl board.? So essentially you can unplug the audio shield from the teensy (male pins on the audio shield plugging into female below), and the teensy from the JackAl (male pins on the teensy plugging into female on the JackAl).? Does that make sense??

I toyed with just using male pins on the teensy for the 20 pins that the audio shield doesn't touch.? This would be the male pins in your picture on the right side sticking up from the teensy.? But I figured, (1) that might make some difficulty mating the teensy to the JackAl due to difference in pin length and, (2) there might be a future need to be able to plug something into those pins for testing or expansion.?

Hope this helps.? Just my $0.02.

Gary - KD8GQM

Gary,

Thanks! I think I will explore your path. Sounds like I have one less part than my approach.

Did you figure out the "interior" plugs on the Teensy (that was my question 2). The VUSB pin (that appears to be missing in all the photos in the assembly manual) may be related to a discussion on cutting a trace on the teensy depending on how you plan to power it. I saw the discussion, and had planned on looking at it before I grabbed my soldering iron. :-)

73
Mark
AJ6CU

开云体育

I know nothing for sure but my assumption was that those (interior plugs) were left over from Jack & Al's testing.? I could find nothing in the manual that anything hooks to them so my plan was to leave them out.? If i'm wrong, I can always remove the teensy and solder them in later.

I haven't cut the trace on the teensy but I plan to.? Not sure but I believe that separates the usb power from the power coming from the JackAl so if you have them both on at once, you won't blow anything up.

Cheers

Gary - KD8GQM

Gary,

I looked on the circuit board trace diagram on page 35 and 36 of Section 2 of the assembly manual and I believe that you are correct on the two parallel inside headers. However, it looks like the ground pin on the cross header (towards the edge of the board) is connected. I am not knowledgeable enough to understand whether that ground pin is important or not. I will probably connect it. The rest of the cross bar pins don't appear to be connected.

Let me know if you check this one or not.

73
Mark
AJ6CU

Gary

Found this in the archives. ?Seems to indicate that should add those extra headers. ?Still don't believe they are needed, but...

/g/JackAl/attachment/475/1/CPU%20PINS%20_2_.pdf

mark

And this is the message id

/g/JackAl/topic/29540974#553

Note that the pdf had headers on top of the audio shield. Neither Jack's description in the above message or details in the assembly manual have top headers. Only male pins.

73
Mark