Idea suggested -- no longer in search  -- tactile switches 6x6 mm .... - Page 1
Forum section: electronics / general

author: coromonadalix
author_rank: Super Contributor
timestamp: August 08, 2024, 06:46:25 pm
content: searching models like this photo, not the commonly contacts6x6 6 or 7 mm shaft length SURFACE MOUNT not thru holesis there a name for this configuration, some sites call them type 2 ??I want to avoid Aliexpress and Amazonthks

author: Swake
author_rank: Frequent Contributor
timestamp: August 08, 2024, 07:48:07 pm
content: You want them with the legs bent to the outside?If legs bent underneath are ok then a 90° rotation solves the issue as long as you use a square sized switch such as the format 6.2 x 6.2 mm. Legs are still not in same place but difference is much smaller, can adapt PCB.C&K has one like that model KSC6, see page 6 of attached PDF

author: PlainName
author_rank: Super Contributor
timestamp: August 08, 2024, 10:22:41 pm
content: Seem to be many on LCSC. Just one example:https://www.lcsc.com/product-detail/Tactile-Switches_YIYUAN-YTS-D003-3K_C2910958.htmldatasheet:https://www.lcsc.com/datasheet/lcsc_datasheet_2201121200_YIYUAN-YTS-D003-3K_C2910958.pdf

author: coromonadalix
author_rank: Super Contributor
timestamp: August 08, 2024, 10:43:40 pm
content: thks guyspls see the picturesthey are not the same contacts positionsnormally seen are 1-3 together, 2-4 together, and short between thembut not what i wanti want 1-2 together and 3-4 together .....

author: Swake
author_rank: Frequent Contributor
timestamp: August 09, 2024, 05:45:30 am
content: That is what I'm saying: rotate it 90° and the 'contacts/switches' are as you write. Don't focus on the pin number but on what the pin does.When you take switches with the pins underneath the pin position difference is minimal and you can easily change the PCB design to accommodate that position.

author: PlainName
author_rank: Super Contributor
timestamp: August 09, 2024, 07:56:44 am
content: What Swake says. Take the pdf I linked to, join the pins as per the illustration and then rotate to match yours. You end up with the pic attached.

author: coromonadalix
author_rank: Super Contributor
timestamp: August 09, 2024, 10:21:15 am
content: can't be rotated the pads wont fitthe story ... a pcb batch, was badly conceived by other people, they badly used the switch pdf's and librairies ...yes to testi rotated the switches, bent the pins, but patching is a mess, and the patch fail after a period of use, pins break, i have 50 of theses to changesi just want to find the inverted models, but outside Ali or Amazon, those 2 call them model type 2 in their ads, but no part references up to now ..

author: PlainName
author_rank: Super Contributor
timestamp: August 09, 2024, 10:44:20 am
content: Ah! OK, now I see the photo you used isn't the one you want, and the black dots are where you want the pins, yes?

author: coromonadalix
author_rank: Super Contributor
timestamp: August 09, 2024, 11:02:24 am
content: yessorry if it confuse peopleslightly re-edited in mspaint

author: Swake
author_rank: Frequent Contributor
timestamp: August 09, 2024, 08:26:37 pm
content: Sorry mate, I searched for about an hour (out of curiosity) and opened many many many datasheets but could not find anything that is 90 degrees rotated compared to usual.Did you find any 'type 2' links? I could use content from that page to search a little deeper.

author: thm_w
author_rank: Super Contributor
timestamp: August 09, 2024, 08:55:46 pm
content: Quote from: coromonadalix on August 09, 2024, 10:21:15 amIf they failed then it was a poor mod job on your part.Cut top right leg, cut bottom left leg, solder switch in place. Fillet epoxy around base of switch to secure. Jumper PCB pads if necessary.Or use a switch like this:https://www.gangyuantech.com/smd-smt-push-button-tactile-switch_p725.html

author: coromonadalix
author_rank: Super Contributor
timestamp: August 10, 2024, 11:19:50 am
content: link hereselect type 2see their offered pinout ?https://www.aliexpress.com/item/1005005275218756.htmli'll order from them but ask before if it is really that pinout ...@thks

author: Swake
author_rank: Frequent Contributor
timestamp: August 10, 2024, 11:56:24 am
content: Unfortunately the pin numbers that are given in that 'type 2' in the top left are in the 'classic' position. The bottom right diagram does not reflect the real physical location. see attachmentHave found some similar cases from datasheets on mouser en RS.

author: Nominal Animal
author_rank: Super Contributor
timestamp: August 10, 2024, 02:30:21 pm
content: I am only a hobbyist and not a professional PCB designer or EE, but I would do tiny (10mm × 8mm) adapter boards for replacing the 6mm × 6mm tactiles with 4.5mm × 4.5mm ones, rotating the new switch by about 30 degrees, so that only two diagonal pins get connected to each pair of close pads that need to be shorted. For soldering the adapter board, I'd use castellated holes at the corners. Aside from the four castellated holes, the adapter would be one-sided (just two solid copper areas, split diagonally). Depending on what you have on the original board the adapter boards will be placed on top of, you might add copper planes on the other side and vias to help with adhesion.(I would probably create a rectangular panel of these at JLCPCB/PCBWay, with plenty of spares; possibly quilliotining them myself. I would add waste space around each tiny tile, for finessing the size with a quilliotine or rotary sander.)Attached is a 3D picture of the quick PCB sketch I did in EasyEDA.Edit: Second one is a 9.6mm × 6.2mm board where the 4.5mm × 4.5mm switch is rotated by 14° (1:4 slope; atan2(1,4)≃14.036°); board pictures only. The underside is the silkscreen and pads for a standard 6mm × 6mm tactile switch.

author: coromonadalix
author_rank: Super Contributor
timestamp: August 12, 2024, 10:58:20 pm
content: good one there, never thought of this oneand yes sadly their type IS the std ones

author: thm_w
author_rank: Super Contributor
timestamp: August 12, 2024, 11:33:32 pm
content: I tested and it fits fine when you just rotate the switch 45 degrees, with the switches I had here. Assuming they are not closely spaced width wise.