You old guys
Our nowadays generation prefers short and into the point texts.
All respect to all of you!

What happens when all of old guys are gone? The ones you depend on for your short to the point answers??? If you don't read and try to understand things you'll spend your life looking for those short answers, and who will keep you employed?

 

Now for your resistors, have you considered tantalums too?

No, I didnt, but I will check them.
Thanks Jpanhalt​

 

What happens when all of old guys are gone? The ones you depend on for your short to the point answers??? If you don't read and try to understand things you'll spend your life looking for those short answers, and who will keep you employed?

Hahaha very true!
By the way I might be older than you guys! You never know

 

...and who will keep you employed?

Ummm... McDonald's?

 

Ummm... McDonald's?

There you go!

 

Hello,

The following page will tell you a lot about those capacitors:
http://my.execpc.com/~endlr/electrolytic.html

And here is the new page from the site:
http://www.iequalscdvdt.com/

Bertus

As did I. Yet even with the internet I still try to verify and read most links that are given when a question here or anywhere is answered. Even when it isn't my question.

Ummm... McDonald's?

Yes Ceramic or Mylar will do, around 100nF .

Polyester would be another choice for de-bouncing, The capacitance is well controlled. +-5% is common.

Use tantalums. As you observed, they are much prettier and come in a variety of colors. Now for your resistors, have you considered tantalums too?

Accuracy matters when and where it counts. It hardly matters in a switch debounce circuit.

MrChips, YOU'RE TOTALLY RIGHT! that is in brief what my problem is all about! My pedometer circuit alike works with 50% counting error, and sometimes more! Below are the sensor motion switches that I tried so far beside a couple more types. Once I feel that I found the right capacitor value I notice that my sensor switch is bouncing 10 times per second. So, I try to go up with the cap value, which it does fixes the bouncing issue, but the down side is it delays counting because it works against the sensitivity of the switch, unless you start jumping so that you shake the switch crazily and your ckt start counting. It is such a pain! Thats why I was trying to try different types of caps, I thought this might fix the issue, because I cant really find a good stable bouncing sensor switch.
Here are the switches that I've tried so far:









Moderatots note : removed doubles

 

That is because that is a very poor way to debounce a switch contact.

 

The best way to debounce a pushbutton is to use a SPDT switch.

The actual implementation will depend on the logic IC family.

 

Granted, you do not always have the liberty to select a SPDT switch.

If the switch is SPST, then you have to settle for less ideal solutions using capacitors and Schmitt trigger.

This is only one example:

 

My pedometer circuit alike works with 50% counting error, and sometimes more! Below are the sensor motion switches that I tried so far beside a couple more types

Then why not use a sensor made for a pedometer? Instead of ones made for alarms? Just the first one I looked at -
https://www.nxp.com/products/sensor...for-iot/intelligent-pedometer-sensor:MMA9553L

 

Then why not use a sensor made for a pedometer? Instead of ones made for alarms? Just the first one I looked at -
https://www.nxp.com/products/sensor...for-iot/intelligent-pedometer-sensor:MMA9553L

But the price for this piece only is around $100! My whole circuit now doesn't cost more than $5.

 

But the price for this piece only is around $100! My whole circuit now doesn't cost more than $5.

Duh! That's the price for a complete sensor development board. This is what you should be looking at. Only $6.50 for the sensor itself.

However, if that's still too expensive and you'd rather use a simple tilt switch or similar, get rid of that screwball circuit you showed and use the one @MrChips gave in post #29. It'll work a LOT better.

 

Then why not use a sensor made for a pedometer? Instead of ones made for alarms? Just the first one I looked at -
https://www.nxp.com/products/sensor...for-iot/intelligent-pedometer-sensor:MMA9553L

The best way to debounce a pushbutton is to use a SPDT switch.

The actual implementation will depend on the logic IC family.

I'm not sure if was able to explain myself well here, my poor ESL English ! The way I'm using the sensor switch in my circuit is as show in this new image. And it should start counting/triggering based on the body movement/motion, therefore I'm not sure how I'm gonna use this non-sensing SPDT switch! I want it to click while I move!

 

Look at the next post, #29.

 

Look at the next post, #29.

Duh! That's the price for a complete sensor development board. This is what you should be looking at. Only $6.50 for the sensor itself.

However, if that's still too expensive and you'd rather use a simple tilt switch or similar, get rid of that screwball circuit you showed and use the one @MrChips gave in post #29. It'll work a LOT better.

MrChips & OBW0549,
Thanks a lot for your assistance! I will build this additional circuit and let you know!
OBW0549, yes, $6.50 still too much and I love my screwball circuit and just attach MrChips' ckt to it

 

If I'm working with microcontroller, I've always considered software debounce the most effective way.

 

Well, it looks like I got what I wanted so far without going through the valuable links were given to me, thankfully, by Bertus. I don't see whats the point of your entry here, with all respect Ebp!
Another thing Ebp, it is such honor for me to chit chat with you guys here instead of just throwing members to an outside links (though they are beneficial too)! It is a forum were everyone can share his views and thoughts!

I encourage you to go as far as you can, but you need to consider if ever doing anything of serious consequence in electronics is a goal of yours, or just a fanciful idea. Your honest decision with yourself (I don't want or need to know), will determine your success in this and all other electronics endeavors. Insulting people who gave you valuable links won't help your cause either- with anyone. Makes you look lazy and ungrateful.

 

Bertus

.

.

I encourage you to go as far as you can, but you need to consider if ever doing anything of serious consequence in electronics is a goal of yours, or just a fanciful idea. Your honest decision with yourself (I don't want or need to know), will determine your success in this and all other electronics endeavors. Insulting people who gave you valuable links won't help your cause either- with anyone. Makes you look lazy and ungrateful.

This a request to the esteemed Moderators to delete some trash nonsense postings!
This is sick and going way too far! You and the other guy who delivered the same useless comment are just being rude and feel bored and try to stir the fire among members and break the peacefulness of the this website! Dont throw useless comments in my threads and go mess away from here. Your sick assumptions have no foundations at all! Just like this , accusing others of being lazy and try to take advantage for doing nothing!!!! Seriously, that is how big your brains! So childish and so irresponsible!
I do have a lot of respect to all members and especially, Bertus, because he was the one who helped resolve some issues with my account when I started here, so please, get away and don't accuse me of being disrespectful and don't pretend to be a person of morals and good manners! Check your accusation for me and come back talk to me!! Don't act like the Police of manners on this website!!!
Such a wasters of time!

 

I encourage you to go as far as you can, but you need to consider if ever doing anything of serious consequence in electronics is a goal of yours, or just a fanciful idea.

He's told us before that he wants to become a "good circuit designer" and to become sufficiently adept that he can get employment as an engineer. However, his behavior-- cavalierly flipping off attempts to give him good, professional-quality information because he's not a "real big fan of those prolonged articles" and doesn't want to have to look for information outside AAC-- is not consistent with those goals (to put it mildly). In fact, restricting himself to getting his information strictly through "chit chat" with AAC members will guarantee he never progresses beyond the level of "beginning hobbyist."

Insulting people who gave you valuable links won't help your cause either- with anyone. Makes you look lazy and ungrateful.

And makes people wonder whether it's worth the time and effort of trying to help him.

 

He's told us before that he wants to become a "good circuit designer" and to become sufficiently adept that he can get employment as an engineer. However, his behavior-- cavalierly flipping off attempts to give him good, professional-quality information because he's not a "real big fan of those prolonged articles" and doesn't want to have to look for information outside AAC-- is not consistent with those goals (to put it mildly). In fact, restricting himself to getting his information strictly through "chit chat" with AAC members will guarantee he never progresses beyond the level of "beginning hobbyist."


And clueless.

Seriously OBW0549!!!
And you guys are talking about how to be respectful and nice to others!! How dare you!
Wherever you see a criticism inside one of my threads then you will notice that that criticism was "liked" by OBW0549!!!
Seriously OBW0549, you went through all my past postings and brought them here and mixed them with your fault accusations and nasty nonsense and still talk about manners and behaviors!
Really, I'm so frustrated and shocked with shallowness of thinking of some senior members!
By the way, I'm not young, might be older than you and just entered the world of electronics field 2 years ago! English is not my 1st language and google translate is my best friend, so don't tell my that I'm lazy!
I do my best and please be patient with me and lets act like adults here!