Electronics > Projects, Designs, and Technical Stuff
small ISP connectors
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Amper:
As i said in my first post, i want it to work in the field without much work, this is not for just flashing once and then selling a product, i want to change firmaware conveniently, so a cable connection with a plug would be optimal.
SiliconWizard:
Yes, but very small SMD connectors are a nightmare reliability wise if you're going to plug/unplug more than a couple times. We had done this in the past on a very small board, this was breaking all the time - even if you're being very gentle.

So yeah I also recommend a pogo-pin thing, either Tag-connect or something custom, as you prefer.
Dave:

--- Quote from: cgroen on March 08, 2020, 03:51:12 pm ---Tag-connect "no leg":
The 3 holes are 35 mil/0.89 mm each

--- End quote ---
This one is not routed well. According to Tag Connect, no tracks or vias should be between the 6 exposed contacts.
Source
cgroen:
Well,
until now, approx 50.000 boards does not agree on that (not of this exact design, but others using the same connector here, also with tracks between the 6 pads) ;)
I can't see what problem that should give you whatsoever, the pads are big compared to the "pogo" pins in the connector. The connector is very well centered with the 3 holes/pins

Amper:
Thats exactly the reason why i was asking ^^ A half size micro match would have been awesome, they are robust and survive many cycles, but well, if it doesnt exist im out of luck.

I will also print some hook to go under a board, in case i want a semi permanent connection the side of the pogostick with the two pins will be on the boards edge, just two alf circles should give nice registration combined with the other one and having it on the edge will allow hooking under the board without having large holes around as with the original design.
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