I’m not sure if this is the correct forum to ask this question, so sorry if I’m wrong.
I’m using an SP511E as a controller for a LED strip. Both LED strip and controller are inside a wooden lightbox. The thing is that I want to add a physical switch to the box so I can also turn it on manually (without opening the box oc) when the internet is not working…
So my question is: do you know if it is possible to “extend” the power tactile button of the SP511E? And if it can actually be swapped for a TTP223 capacitive touchpad so I can turn it on by touching a certain area on the outside of the lighbox?
TTP223:
Please let me know what are your thoughts and thank you in advance.
TTP223 info and schematics: 1 Channel Capacitive Touch Module - TTP223 [4481] : Sunrom Electronics
Greetings.
Certainly can extend the physical button(s).
They are just simple switches soldered to the board, there’s no reason that you can put another physical switch (or a relay for that matter) in parallel with the existing switch.
As for the ttp223 that might work as well, it’s certainly worth a try.
Worst case, you could drive a relay with the ttp223 and put that across the button.
Hey, thank you for your answer. I’m pretty new to electronics tbh, so I’ll have to read some more about relays to understand I guess.
My unexperienced brain tells me I just gotta take the positive line from one side of the tactile switch and connect it to the TTP223’s vcc pin, find the negative line and connect it to the ground pin and then the output just connect it to the other side of the tactile switch. But it’s only based on the little I’ve learned so far. I just want to be sure I won’t mess the wifi controller.
I’m not really sure where should the relay go tho. And what type of relay should I use? Also I don’t really understand why would I need the relay in the first place lol
Alright, after reading some more about relays I finally get it. A relay is used to control a large current through a smaller current.
In this case the TTP223 works with 2 - 5V and the SP511E works with 12v. So using the relay, I can connect the TTP223 to a 5V battery (Through the VCC and GND pins) and connect it to the relay (Through the I/O pin), then the relay to the SP511E tactile button. Touching the TTP223 would allow current to travel through the relay to the SP511E. This would allow me to protect the TTP223.
Is this correct?
Based in this I guess I would need a SPDT, right?
