Compact Bounceless Momentary Switches For Lazy Hobbyists - Page 1
Forum section: electronics / projects

author: JoeN
author_rank: Frequent Contributor
timestamp: November 17, 2016, 06:34:55 am
content: I like messing with TTL and raw hardware and I find myself making bounceless switches over and over using the RC/inverter method. I decided to make a module so I didn't have to do it anymore. It's compact, which allowed me to play with some small parts, has two switches, and allows either switch to be positive or negative logic depending on a solder jumper setting. In addition, it has an optional onboard regulator, if necessary. It's nice and small and is 0.1" compliant for breadboards. Should I sell these guys on eBay for lazy hobbyists or am I the only person who ever had this requirement? I don't see a similar product out there, maybe it's a nice project but a terrible product.Left one with the optional regulator, button one positive logic, button two negative logic. Right one without a regulator, both buttons positive logic.

author: jonovid
author_rank: Super Contributor
timestamp: November 17, 2016, 07:03:47 am
content: QuoteIF Yes then you add programmable LED 3x3 dot matrix atop of your tactile switchs as 3d printed button caps. the 1st Dice face switch.winner winner chicken dinner

author: Jeroen3
author_rank: Super Contributor
timestamp: November 17, 2016, 11:52:50 am
content: Cool. No more messing around with buttons thatalmostfit in your breadboard.Will you also make one with apotentiometer*?*3386F-1-502TLF

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: November 17, 2016, 12:38:22 pm
content: http://www.digikey.ca/product-detail/en/maxim-integrated/MAX6816EUS-T/MAX6816EUS-TTR-ND/774084

author: JoeN
author_rank: Frequent Contributor
timestamp: November 17, 2016, 11:02:00 pm
content: Quote from: Jeroen3 on November 17, 2016, 11:52:50 amIt's interesting that you mention this because I have done all sorts of breadboard adapters. Most of them are passive - BNC into 2 pins, VGA breakout into 15 pins, different kinds of switches into 2 or 3 or 4 pins, etc. As you note, these common momentary switches don't breadboard well. My prior version of this adapter is just two switches directly connected into the pins. Then I made this debounced version to take care of that issue. However, I have never had trouble with that kind of pot. The leads are 0.1" apart and long enough that it doesn't pop out of my breadboard. Why are you having trouble with that thing?

author: JoeN
author_rank: Frequent Contributor
timestamp: November 17, 2016, 11:04:10 pm
content: Quote from: Alex Eisenhut on November 17, 2016, 12:38:22 pmYou have replaced my $0.19 cent part with a $2.23 part. The part is physically larger. There is no obvious way to provide both positive and negative outputs. No thanks.

author: Jeroen3
author_rank: Super Contributor
timestamp: November 18, 2016, 06:32:48 am
content: Quote from: JoeN on November 17, 2016, 11:02:00 pmIf you want to buffer them, you have to add a small rail-to-rail amp on a soic adapter.

author: obiwanjacobi
author_rank: Super Contributor
timestamp: November 18, 2016, 08:08:22 am
content: Would be awesome if you could design the PCB such that you'll get a strip of say 10 buttons you can break of...

author: SeanB
author_rank: Super Contributor
timestamp: November 19, 2016, 08:25:36 am
content: +1 for a breakout board you simply take the needed number and break off 9 probably in pairs) , and a lot cheaper than the Maxim vapourware.

author: Bryan
author_rank: Frequent Contributor
timestamp: November 20, 2016, 09:40:31 pm
content: Quote from: Alex Eisenhut on November 17, 2016, 12:38:22 pmThe datasheets referenced in in the link are pretty good reads.

author: t1d
author_rank: Super Contributor
timestamp: November 23, 2016, 05:00:35 am
content: I vote for putting your board on Ebay. Please be aware that your shipping cost will likely not be for just a plain envelope and stamp. The machines that process letters have rollers that crush hard objects. Your going to need at least a cardboard sleeve and that moves you into package rates.FYI:Recently, I discovered that momentary tactile switches come in a two pin, through hole design. The pins are straight and long, which is much better for breadboarding. I bought mine on Ebay.