I agree with the problem of the very limited sample size; it’s 1! I didn’t
intend for this to become my life’s work and spend money to destroy switches
??, just provide some idea about any obvious changes when you take a switch and
operate it 300 cycles on & off.
Hey, at least I feel better.
So, I’ll check the resistance and compare to when I started, take it apart and
check the internal contacts, over-heat another switch during soldering and
check that one for a few hundred cycles, then finally summarize what I see in
the two test switches compared to the control.
Real simple, and perhaps too simple for some. Kind of like twisting wires. OMG
Richard Dierking
From: Alexander Jones<mailto:uscjones@xxxxxxxxx>
Sent: Friday, January 20, 2017 8:30 AM
To: roc-chat@xxxxxxxxxxxxx<mailto:roc-chat@xxxxxxxxxxxxx>
Cc: James Dougherty<mailto:jafrado@xxxxxxxxx>
Subject: [roc-chat] Re: Twisting Wires
Yeah, not statistically rigorous....though, assuming you do get a failure
eventually, you will have at least identified a possible failure mode....you
just don't know whether the frequency or probability of its occurrence per your
test is representative or an outlier. Even having 3 of them instead of one
would be an improvement.
On Fri, Jan 20, 2017 at 7:27 AM,
<richsilv@xxxxxxxxxxx<mailto:richsilv@xxxxxxxxxxx>> wrote:
For you to actually draw conclusions… You need to test a few hundred switches…
Testing a single unit is, well, interesting at best…
From: roc-chat-bounce@xxxxxxxxxxxxx<mailto:roc-chat-bounce@xxxxxxxxxxxxx>
[mailto:roc-chat-bounce@xxxxxxxxxxxxx<mailto:roc-chat-bounce@xxxxxxxxxxxxx>] On
Behalf Of R Dierking
Sent: Friday, January 20, 2017 7:04 AM
To: James Dougherty; ROC Chat
Subject: [roc-chat] Re: Twisting Wires
Yes, I would like to learn more about Arduino and switches gone wild. LOL.
But, I don’t want to go too far OT.
I think the 110-220 switch issue is going to have some conclusions shortly.
As for twisting wires as an alternative to switches, I don’t think that one
will be going away. It’s cool, but should be done the way that Gerald showed.
Richard Dierking
Back to doing laundry and turning the switch.
From: James Dougherty<mailto:jafrado@xxxxxxxxx>
Sent: Thursday, January 19, 2017 9:41 PM
To: ROC Chat<mailto:roc-chat@xxxxxxxxxxxxx>
Subject: [roc-chat] Re: Twisting Wires
Richard,
I would add the LP55231 new driver chip if we did the board, then
I would show a color for each FET channel.
This is another Wire() API job, driver already exists.
Check it out
https://www.sparkfun.com/products/13884
So now you would have a debounce switch which could on/off electronics.
In the real design, we would have multiple power sources and inputs,
Switches gone wild!!!
BTW, the Pixhawk Autopilot uses this and drives PWMs when calibrating the IMU.
-James
On Thu, Jan 19, 2017 at 9:31 PM, James Dougherty
<jafrado@xxxxxxxxx<mailto:jafrado@xxxxxxxxx>> wrote:
It's a few lines. I think the loop would check/count each button press and then
drive a GPIO
to open each fet. Couple that with a buzzer and you've got a crowd-pleaser.
I like the feather and the pro-mini for prototyping or writing some driver for
an I2C/seria/spi chip
Cheap and fun, plus little projects like this are very satisfying.
To prototype, here's some gear to check out:
fet board - http://www.ebay.com/itm/371557158763
pro mega -
www.ebay.com/itm/Mini-Device-for-Arduino-Nano-V3-0-with-PRO-ATMEGA328P-Module-Board-Hot-New-LS-/<http://www.ebay.com/itm/Mini-Device-for-Arduino-Nano-V3-0-with-PRO-ATMEGA328P-Module-Board-Hot-New-LS-/>
under $6.
Study
https://www.arduino.cc/en/Reference/HomePage
digital{Read,Write}()
setup() will set the pin state
loop() will check pins you designate as buttons and drive output (FET inputs)
Once you have a sketch, we can make a little PCB if you guys
are interested.
On Thu, Jan 19, 2017 at 9:22 PM, Kenneth Brown
<ken@xxxxxxxxxxxxx<mailto:ken@xxxxxxxxxxxxx>> wrote:
I have some code for an Arduino Nano to debounce switches..... somewhere.
I better find that folder or I'm gonna have to do it all over again.
Ken
On Jan 19, 2017, at 9:03 PM, James Dougherty wrote:
So go get yourself an Arduino pro-mega and write some code to de-bounce the
switches
so you can drive a FET for power - it is a fun an easy project and you would
have one button
for multiple sources.
Hey, maybe there is a market for something like that. Maybe we should make a
little switch board
with some open source firmware...