What will happen if you set up multiple chips on a single board? Is it feasible to support multiple touch sensors at the same time? Would multiple touch sensors interfere with each other as multiple fingers are pressing on difference sensors because they share the same ground?
one off IC like that, i'd have used the soldering iron, a lot quicker. I only used the hot air for getting them off where you want all joints to melt at once. great little chip and it also does the debounceing for you. nice vid and keep the pet in the brackground :)
Yeah but I need the practice with the hot air. The PET is having it's time in the sun for a while, trying to subconsciously encourage myself to actually do something with it again.
@@DavidWatts I just fixed my PET 4016 upgraded to 4030 spec many years ago, go for it there is lots of information on the interweb. circuits can be found here www.zimmers.net/anonftp/pub/cbm/schematics/computers/pet/ mostly standard 74 series parts, you can still get RAM etc on ebay
Nice video! It made me aware of the sop dip adapters. I checked if there were any sop6 boards but for some reason they all only sell sop8 and up... weird.
I need to put this inside my galaxy buds plus earbuds case to manually toggle the charging state. But the output on those pins is only 1 volt. Any way I can make it work?
Epic overcomplication that makes a simple soldering task into a very difficult one. This is like watching Julian Illet bumbling around wirh solder paste, ending up with a worse result than everyone else can do with a soldering iron.
Spooky ! I was just making a Kicad symbol for theses as your notification came up !...I love 'em, so easy, no hardware or software debounce to worry about, at least they work fine in my sketches (doesn't say that much) I bought mine already on little PCB's so easy to play with, and I'm gonna buy some or just hot plate them off, I found 47pF worked best if you want lite but actual contact. In software I just detect a falling edge and Roberts ya relative.
I also made a symbol for Eagle. I was really surprised to see how low the component count was. I have quite a few of those little modules from an ill-advised aliexpress order years ago so I may do the same.
Sir i desing th pcb using ttp223 bt its not working, i used a 100nf capacitor for the touch sensitivity where am I going wrong.. Shoud i use 50pf capacitor and then it will work
@@Infinion yup i removed the 100nf capacitor it works fine.... Bt i still have 2 questions.. First is it necessary to add a capacitor...? Secondly after i removed the capacitor although it worked fine bt after few minutes it stops working nd remains it ON state forcing me to cut th power... Nd after giving the power back it again works for few more minutes.....
@@burhanuddinbhiwaniwala618 If you connect an oscilloscope you will find that this electrode pin is being oscillated at a frequency to detect small changes in capacitance. As you add capacitance, you are filtering this frequency out and reducing the peak-peak voltage or the voltage ripple. The more capacitance you add, the more it will resist changes in voltage. This is my opinion from a filtering point of view. If the duty cycle and period of the frequency on that pin is fixed, then adding capacitance should reduce sensitivity.
@@burhanuddinbhiwaniwala618 To answer your second question, I am not sure. Make sure to add capacitance (your 100nF and maybe a 1uF) to the supply voltage pins so that the supply voltage is stable.
@@InfinionThanks sir fir your patience and time... I have added 100nf nd 10uf in parallel to 5v supply with GND And the 100 nf to the touch pad pin connecting it to the GND... After i saw your video once again where at first you did not add any capacitor still the touch sensor was working so in order to check my schematic was correct i removed the 100nf capacitor from the touch pad.... But with it my second question rises
This is exactly what I was looking for: a demo that showed how sensitive this chip can be! Now I'm positive this is the chip used in this table: ruclips.net/video/zD9cv4JiNfE/видео.html Using this breakout board: a.co/d/6b4XqRl (not affiliate) You mentioned there might be boards that have touch sensitivity already built into them. You're right! The ESP32 has 10 touch inputs built right in!
Absolutely no need to use hot air to try and solder that IC, plus doing it that way is incredibly difficult compared to just using a normal soldering iron. Using solder paste makes it even worse LOL. Note you can buy prebuilt TPP223 modules for under 20 CENTS each that do everything shown here. Cheaper than buying the bare chips LOL
Hot air is almost magical - with the component being drawn into alignment on the pads by surface tension - if you flux the heck out of everything with a flux pen before you start.
Thanks David. Nice demo, this is better than getting a ready-made board with the TTP223. Take care.
I was looking for this exact video! Thanks bro!
What will happen if you set up multiple chips on a single board? Is it feasible to support multiple touch sensors at the same time? Would multiple touch sensors interfere with each other as multiple fingers are pressing on difference sensors because they share the same ground?
Awesome project to quickly get done. I have some of those on the red module boards with the touch pad integrated. Nice!
Ha ha, I have those too and I've never used them.
@@DavidWatts at least now you know the IC inside and out!
one off IC like that, i'd have used the soldering iron, a lot quicker. I only used the hot air for getting them off where you want all joints to melt at once.
great little chip and it also does the debounceing for you. nice vid and keep the pet in the brackground :)
Yeah but I need the practice with the hot air. The PET is having it's time in the sun for a while, trying to subconsciously encourage myself to actually do something with it again.
@@DavidWatts I just fixed my PET 4016 upgraded to 4030 spec many years ago, go for it there is lots of information on the interweb. circuits can be found here www.zimmers.net/anonftp/pub/cbm/schematics/computers/pet/
mostly standard 74 series parts, you can still get RAM etc on ebay
@@DavidWatts practice hot air on test boards and maybe watching a few hot air soldering tips vids, you be a pro in no time.
Thanks for the example David but just one question, how big it could be the “touch sensor area” ??
Nice video! It made me aware of the sop dip adapters. I checked if there were any sop6 boards but for some reason they all only sell sop8 and up... weird.
“Now I need a breadboard. What’s this one?” That is my line ! :-)
it'd be interesting to see how this works *through* things like an enclosure.
With no sensitivity cap you get about 2 - 2.5 mm distance and no problem with fr4 PCB material or thin plastics that I have tried.
andymouse123 Thanks - thats great. I’m going to fire up EasyEDA :-)
Hmmmm, interesting :-)
I'm using the red TTP223 modules inside casing front covers. Works like charm.
either you have gigangtic tooth sticks or these IC are so tiny
nice project
sot-23, absolutely minuscule. I can just about hand solder them with a conical tip, with a lot of difficulty:)
I imagine when the electrode is grounded sensing is disabled? Or does this cause the chip to heat up?
Neat, can see a few useful applications. As others have said proximity switch through a case would be amazing. :-)
Not sure about how well it would work through materials.
what happens when you touch it with metal?
I need to put this inside my galaxy buds plus earbuds case to manually toggle the charging state. But the output on those pins is only 1 volt. Any way I can make it work?
Actually quite nice 👍
Wow! ... putting solder paste down with a toothpick... hot air gun..BOOM! Dude... epic work... I guess there don’t exit in 8 pin DIL :-)
Epic overcomplication that makes a simple soldering task into a very difficult one. This is like watching Julian Illet bumbling around wirh solder paste, ending up with a worse result than everyone else can do with a soldering iron.
Your standards for 'epic' are too low John
@@DavidWatts - LOL, that is very true David. Cheers!
even I out the solder paste with a toothpick....... :-)))
I love you're videos
*YOUR
Spooky ! I was just making a Kicad symbol for theses as your notification came up !...I love 'em, so easy, no hardware or software debounce to worry about, at least they work fine in my sketches (doesn't say that much) I bought mine already on little PCB's so easy to play with, and I'm gonna buy some or just hot plate them off, I found 47pF worked best if you want lite but actual contact. In software I just detect a falling edge and Roberts ya relative.
sorry Andy, Bob's my aunt now :)
I also made a symbol for Eagle. I was really surprised to see how low the component count was. I have quite a few of those little modules from an ill-advised aliexpress order years ago so I may do the same.
Cool. So no capacitor will give you a proximity sensor. Nice. A covid-19 friendly "no touch" switch! :)
there is a slight buzzing sound wheever you touch the pad
Yeah I noticed that.
Interesting, I missed that. The power supply cable must have been next to the microphone wire, same thing happens with the soldering iron.
Can u tell me plz.. how to run it on ac main . I mean can I use it on ac by use of register to operate optocoupler or some MOSFET.
You could do it with a relay but I don't usually play with mains electricity so I cannot give any good advice.
Sir i desing th pcb using ttp223 bt its not working, i used a 100nf capacitor for the touch sensitivity where am I going wrong.. Shoud i use 50pf capacitor and then it will work
100nF seems too large. The datasheet specified 0-50pF max
@@Infinion yup i removed the 100nf capacitor it works fine.... Bt i still have 2 questions..
First is it necessary to add a capacitor...?
Secondly after i removed the capacitor although it worked fine bt after few minutes it stops working nd remains it ON state forcing me to cut th power... Nd after giving the power back it again works for few more minutes.....
@@burhanuddinbhiwaniwala618 If you connect an oscilloscope you will find that this electrode pin is being oscillated at a frequency to detect small changes in capacitance. As you add capacitance, you are filtering this frequency out and reducing the peak-peak voltage or the voltage ripple. The more capacitance you add, the more it will resist changes in voltage. This is my opinion from a filtering point of view. If the duty cycle and period of the frequency on that pin is fixed, then adding capacitance should reduce sensitivity.
@@burhanuddinbhiwaniwala618 To answer your second question, I am not sure. Make sure to add capacitance (your 100nF and maybe a 1uF) to the supply voltage pins so that the supply voltage is stable.
@@InfinionThanks sir fir your patience and time...
I have added 100nf nd 10uf in parallel to 5v supply with GND
And the 100 nf to the touch pad pin connecting it to the GND...
After i saw your video once again where at first you did not add any capacitor still the touch sensor was working so in order to check my schematic was correct i removed the 100nf capacitor from the touch pad.... But with it my second question rises
The pin is big enough, but you can't touch the wire insulation also.
That'll be it, it was freakin out when I touch the jumper earlier in the video so that makes sense.
0:02 you made it to the finish :)
This is exactly what I was looking for: a demo that showed how sensitive this chip can be! Now I'm positive this is the chip used in this table:
ruclips.net/video/zD9cv4JiNfE/видео.html
Using this breakout board:
a.co/d/6b4XqRl (not affiliate)
You mentioned there might be boards that have touch sensitivity already built into them. You're right! The ESP32 has 10 touch inputs built right in!
Absolutely no need to use hot air to try and solder that IC, plus doing it that way is incredibly difficult compared to just using a normal soldering iron. Using solder paste makes it even worse LOL. Note you can buy prebuilt TPP223 modules for under 20 CENTS each that do everything shown here. Cheaper than buying the bare chips LOL
The was absolutely no need for anything in this video. I thought you had been around a while John, are you forgetting the type of videos I make?
Hot air is almost magical - with the component being drawn into alignment on the pads by surface tension - if you flux the heck out of everything with a flux pen before you start.
Very poor presentation.
I'll get a refund in the post to you