How many pins would you think you need

Considering you can sense pressure on each of them?

are you using SPI? I2C? PCF?

None lol

Made the touch board myself

🤔

more than arduino gives you without using *something*

Shift Register?

Each of these boards can handle 16 individual touch buttons

They use 3 pins

2 are common for every board, so using one or ten it's the same

The only overhead is that extra pin

thats the HCF4067?

Trade secret also use Google

Analog mux

just because you can read your own handwriting doesnt mean i can

There isn't much handwriting now

is that SN7192?

Oh don't mind those

Just look at the circuit those were notes

It s a discontinued counter ic

I didn't use shift registers becaus I wanted to get at least 60 reads on every button and Every board, or playing would be akward

You can scale forever if it's a less intensive application, say a keyboard

http://www.gammon.com.au/forum/?id=10918

@Ondsinet grounding bypass and/or decoupling caps
ground to IC gnd pins or arduino gnd plane?
shortest path wins, or save the 4 hot IC gnd pinds from any extra stress?

Connect to ic pins

And they should all be connected together anyway

It really wont matter in this case

Also stress<:covfefe:440543908846632980>

of course theyre all connected 😄

thank you

still no solder wick yet

<:pepe_why:378719408367075333>

The 4 grounds on that ic are there to allow it to sink more current

And the datasheet says for heat dissipation so I guess you are supposed to leave a good blotch of solder to act as a makeshift dissipator

A capacitor there won't cause any kind of stress

it says it wants some copper down there, or a grounded heatsink. mine's not getting that hot but im gonna up the voltage, and then later im gonna stack these bitches for the hell of it

Found a photo of my l283d ic setup