<whitequark>
I will make some time for it one way or another, but right now I'm deep in nmigen guts.
<whitequark>
if you have some time yourself I would greatly appreciate help. if not, no worries
<whitequark>
(someone else volunteering might also work, but I know I trust marcan completely on the PCB design side and his style is pretty much entirely aligned with mine... so less communication overhead there)
setrofim has quit [Ping timeout: 244 seconds]
_whitelogger has joined #glasgow
_whitelogger has joined #glasgow
gsuberland has quit [Ping timeout: 268 seconds]
<marcan>
whitequark: noted. currently my free time is trending towards negative until the beginning of august, sadly :/
<marcan>
but I'll add it to the pile of things for if I somehow manage to find some space in my schedule
<whitequark>
ack
apo has quit [Ping timeout: 252 seconds]
apo has joined #glasgow
futarisIRCcloud has quit [Quit: Connection closed for inactivity]
<electronic_eel>
whitequark: what functionality do you have in mind re test jig?
<electronic_eel>
could a (known good) glasgow be used to do most of the testing and this is mostly about placing pogo pins?
<electronic_eel>
probably also an additional analog mux to allow checking the voltage rails
<electronic_eel>
but even with the analog mux, the vsense of a working glasgow could be used to do the actual adc
<electronic_eel>
will the test jig be used together with a programmable lab psu with ocp? or should current metering & limiting be also integrated into the test jig?
<electronic_eel>
esden: since you will probably do the actual testing - what do you have available regarding programmable power supplies?
<esden>
I have a BK Precision 1688B It has a USB interface that I have not had a chance to test yet.
<electronic_eel>
the 1688b seems to be more for the high power stuff with 20A output capability. current readout is just 3 digits.
<electronic_eel>
100mA lsb (0.2% + 3 digits spec) is very rough to verify if power consumption of a Glasgow is within expected bounds
<electronic_eel>
but it could still be used to limit current draw when there is a short somewhere
<electronic_eel>
but then there should probably be a more precise current sensor on the test jig board
<electronic_eel>
do you have any bed of nails holding hardware which could be used for this?
<electronic_eel>
or how do you currently do testing of your boards, especially if they don't have connectors soldered yet?
<electronic_eel>
i mean mostly holding the boards in place so that the pogo pins line up on the test pads
<tnt>
heh funny, I'm designing a plate to laser cut right now to hold pogo pins in the right place :)
<electronic_eel>
tnt: is the laser cut plate you design a standalone thing or is it designed to fit into a preexisting jig holder?
<tnt>
No, this is my own design ... mostly just a test to see if this is a viable solution to hold onto them.
<electronic_eel>
it is a laser cut jig fixture designed to be laser cut. it uses openscad to create the layout parametrically
<electronic_eel>
i haven't used it yet, but it is my bookmarks to try it out when i need something like this the next time
<tnt>
mm, no I hadn't. Interesting, although all my test points are on the back.
<electronic_eel>
you could place your pcb in backwards?
<tnt>
Wouldn't really fit very well, the other side is covered in components :)
<electronic_eel>
ok, you'd have to modify this design then or do your own
<electronic_eel>
I prefer to use a pcb to hold the actual pogo pins because they can then be directly soldered in (no hanging wires) and i can also place test circuitry directly on there
<electronic_eel>
the pcb can then of course be screwed into the rest of the fixture
<electronic_eel>
and laser cutting should work well to build the rest of the fixture
<tnt>
yeah, this is currently just a quick thing I can do tomorrow rather than wait for another pcb.