Hacking Capacitive Touch Buttons

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Leo's Bag of Tricks

Күн бұрын

Пікірлер: 42

@romancharak3675 9 ай бұрын

I will need to study that circuit diagram before I can fully understand it. What a neat idea !

@Skunkola 9 ай бұрын

YES! These touch things are a bugger, thank you for giving me a solution and an option of remote operation. I watch a lot of electionic channels, your's is by far the most inspiring and original. I wish you every success and happiness my dude 🤘

@lily-xi3bn 4 ай бұрын

can you suggest me some electronic channels ?

@stach6265 6 ай бұрын

Thanks to you i've repaired my washing mashine phantom play touches. After drying front panel from inside it works like a charm. Moisture was the problem!

@eightbit3342 9 ай бұрын

Excellent video dude! and such a simple circuit :) my current project is leading me towards the use of capacitive touch as the input device and that circuit looks very robust, could be stuck to almost anything and doesn't break the bank to build, marvellous! much love from over in England, 8-Bit.

@chrisegonmusic 9 ай бұрын

My man sure does own some rad shirts 👕

@yjweaver5108 9 ай бұрын

Capacitive sensing is a proud specialty of cypress psoc microcontrollers. They self tune, can be endlessly configured, and there’s beautiful software to interface with it. Psoc devices are the most underrated microcontrollers on the planet for medium complexity design (Now owned by Infineon, sadly)

@mikegofton1 9 ай бұрын

Thanks. A clear conductive film would be ideal electrode material to preserve the visual switch indication.

@yasirrakhurrafat1142 9 ай бұрын

Das wus I wus thunkin. But wut?

@leosbagoftricks3732 9 ай бұрын

Where would we get this clear conductive film?

@mikegofton1 9 ай бұрын

@@leosbagoftricks3732 there are a number of suppliers online, however I believe a small amount of powered graphite rubbed onto clear adhesive tape may also work.

@jfpsimon 9 ай бұрын

Making a hole in the copper tape before applying, with a paper hole punch, would work too

@mikegofton1 9 ай бұрын

@@jfpsimon good point, the metal spring describes a circle under the front surface - I expect a circular track of copper having the same diameter would still have about the same capacitive effect as Leo’s copper pad.

@Real_YODA_Man Ай бұрын

@Leo's bag of Tricks What happened to episode 4 of the Stirling engine?

@proczniak Ай бұрын

It actually works like a charm! Thank you!

@stuartmclaughlin6823 8 ай бұрын

This is exactly what ive been looking for now for over four years. Currently, i use a mechanical setup to actate a Capacitive button on a mobile air con unit. It is a servo, and arduino nano with a temp/hmidity sensor. Once it hist a certain level, it actualtes the servo and does the same again to switch off when the air is cooled. It is being interfered with by AC i think, works fine for a bit then constantly switches on and off. Im hoping this will solve my issues!!!!

@evilc2048 Ай бұрын

THANKYOU! I can confirm that this circuit works just fine using an Arduino to trigger the button. The Arduino seems to work with or without the pullup resistor on the switch side - so it''s possible to have both the switch (with pullup resistor) and the Arduino connected at the same time - so you can have a physical switch to trigger the button (To test your circuit works), and connected to a GPIO pin (For testing your code)

@leosbagoftricks3732 Ай бұрын

Thanks for the shout-out- the circuit needs a 0-5 Volt signal, your idea of the extra switch is nice, but beware that you will short your IO pin to ground if it's HIGH when you push the button.

@evilc2048 Ай бұрын

@@leosbagoftricks3732 I think I see what you are saying now. I don't have the switch rigged up any more, but if I did, I guess I could add a diode to make sure that current could only ever flow out to the GPIO, and not from the GPIO via the (closed) switch to ground?

@jonasneuhaus4717 7 ай бұрын

Hello, I set up the system according to the plans provided by you, thank you! Im using it on a Boohenka dehumidifier (the one with the 1200ml tank). For switching, im wanting to use a raspberry pi zero 2 w GPIO (so 3.3V instead of 5V). However, i cannot get the system to run reliably. I was playing with the on and off switching times on the raspberry, but only managed to let the dehumidifier switch on once (not reproducible). Could the voltage be the reason, or is there something else I could adjust? Im now upping the voltage with a optocoupler (AZDelivery KY-019) as a first step.

@leosbagoftricks3732 Ай бұрын

Best to use a MOSFET as a level shifter, run the circuit from 5V use the switch version with an NFET in place of the switch if you have 3.3v IO outputs.

@excelisfun 7 ай бұрын

Leo!!! "Button Pusher Thing" and "Perky Jerky", dang you are good!!!! But what else could we expect from a Maybeck student, Berkeley skater and dude with a scar on the neck that chicks love!!!

@NiksSofa 9 ай бұрын

Interesting. that should work with mobile phones or non resistive touch screens too, right?

@leosbagoftricks3732 9 ай бұрын

not necessarily, this is intended for non-matrix, single electrode sensor buttons.

@kpnconsulting8739 9 ай бұрын

Fun little circuit. Presumably the cap is to give a slower transition between levels. Also helps debounce the switch. But what's the deal with the diodes?

@leosbagoftricks3732 9 ай бұрын

The capacitor bypasses the voltage divider node, making it a lower impedance at the high frequencies. The diodes? did you watch the video?

@مصطفىالقرشي-ك1ك 9 ай бұрын

Impressive! Thank you!

@zeusstl 2 ай бұрын

Do the amps (power) on the 5v power supply matter? I'm using a 1A power supply and this circuit does not work consistently for me.

@leofernekes343 2 ай бұрын

Circuit draws a few mA per switch- very low power

@mukundamodell 9 ай бұрын

This is really useful. I hate capacitive buttons so much. Capacitave touch screens are awesome but a touch "button pad" should never replace mechanical switches. Combine this with a $5 esp32 micro and esphome firmware to automate just about anything! Awesome.

@gedr7664 9 ай бұрын

Wow this is so fascinating - thank you!

@JTordur 7 ай бұрын

Very good Here is what I learned, using two diodes like you mentioned, make a very simple high impedance, but simple to control node in a circuit. And as always, the way you make custom hand made boards is very inspiring!

@RoyvanLierop 9 ай бұрын

Interesting! I've used Reed relays in the past for the same purpose. Tip for a new video: creating a variabel frequency sine wave circuit with only analog parts.

@leosbagoftricks3732 9 ай бұрын

Reed relays! nice idea, very simple.