[kicad-users] Semicircular solder-bridge pads

[[e-mail] [kicad-users]]

Hi


Please can someone advise a good way to create small semicircular solder-bridge pads? That shape is supposed to promote "blob-ability".


I'd like to make a row of these pads in pairs


---(| |)---


---(| |)---

---(| |)---


etc.

[Pedro Martin [e-mail] [kicad-users]]

Hi,

There is a thread in the forum about something similar.

https://forum.kicad.info/t/layout-challenge-make-this-contact-pad-with-kicad/5634/9


Regards,
Pedro.

Post by ***@yahoo.co.uk [kicad-users]
Hi
Please can someone advise a good way to create small semicircular
solder-bridge pads? That shape is supposed to promote "blob-ability".
I'd like to make a row of these pads in pairs
---(| |)---
---(| |)---
---(| |)---
etc.

[Cirilo Bernardo [e-mail] [kicad-users]]

Aside from small oval + rectangular pad, which probably won't give you as nice a shape as you'd want, the only other thing I can think of is to have a footprint with two small circular pads and use a script to generate a semicircular fill zone around them.

From: "***@yahoo.co.uk [kicad-users]" <kicad-***@yahoogroups.com>
To: kicad-***@yahoogroups.com
Sent: Friday, March 10, 2017 5:06 AM
Subject: [kicad-users] Semicircular solder-bridge pads

  Hi
Please can someone advise a good way to create small semicircular solder-bridge pads? That shape is supposed to promote "blob-ability".
I'd like to make a row of these pads in pairs
---(| |)---

---(| |)---
---(| |)---
etc.
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[[e-mail] [kicad-users]]

I think I get what you are asking and that may or may not be a bit tricky to do. This is the pad shape I've seen used for this and might be easier to make.


.-.
======O )======
`~`

I hope this turns out ok. It should be easy to make the round inner pad. The outer ring can be done as a pour which will leave a clearance with the round inner pad and it's trace. This shape will promote the same round blob, but have a lot more edge for overlapping. Personally, I would use a short piece of wire and actually lay it across the gap as a jumper or a surface mount zero ohm resistor. I just don't trust solder blobs.

Rick C.

[Clemens Koller [e-mail] [kicad-users]]

Hi!

I recommend to start with a regular i.e. 1005M (0402 imperial) footprint to be able to allow assembly of regular 0 Ohm resistors just in case you want to stay compatible with mass manufacturing.

If you want to (hand-)solder these solder jumpers/bridges you can additionally bring copper+solder masks together as far as your clearance allows. With a narrow gap, it's very easy to close the bridge but more difficult to open. If the gap is wide, it's easy to open the bridge but hard to close... so you can adjust depending on your preferences. YMMV.

Regards,

Clemens

Post by ***@yahoo.co.uk [kicad-users]
Hi
Please can someone advise a good way to create small semicircular solder-bridge pads? That shape is supposed to promote "blob-ability".
I'd like to make a row of these pads in pairs
---(| |)---
---(| |)---
---(| |)---
etc.

[[e-mail] [kicad-users]]

Thanks for all the feedback.

I recently had made some boards with just 0.3mm gap for bridging. Also, the solder mask was removed between.

Even so, it was not easy to bridge. I think this was because the pads themselves had very little copper area on the side where the bridging was designed to be.

I might try the bitmap2component route.

Ideally though, I would design the pad using an arc. I need lots of solder bridges - these are for optional connections from a central 'power' trace to pads on an IC.

(I have tried the 'overlay 2 pads' method, and it creates a lot of problems, both on the schematic and when laying out a board).