Search found 1294 matches

by Lenp
Sun Dec 16, 2018 7:48 pm
Forum: General Discussion
Topic: ok,, New Project time,,,
Replies: 26
Views: 1563

Re: ok,, New Project time,,,

What is the value of the pot you tried. If it is too low it may load the sensor voltage and it will go too low. Off the cuff, I would try a 10-100 k pot(linear) preferred
by Lenp
Sat Dec 15, 2018 4:05 am
Forum: General Discussion
Topic: Water Leak
Replies: 8
Views: 341

Re: Water Leak

Most of the critical areas are clustered around the laundry area, and the kitchen is above. It's easy wire access and around 100 feeit of wire for all. Second floor will probably be skipped since plumbing access is difficult. The panel could have many zones but probably only a couple are really need...
by Lenp
Fri Dec 14, 2018 2:10 pm
Forum: General Discussion
Topic: Water Leak
Replies: 8
Views: 341

Re: Water Leak

My enhanced sensitivity water detector had a funnel that provided a nominal 1000:1 sensitivity gain! (collecting the water and directing it to the tablet!) Two bare wires on copper pipe? Well maybe a roll of ANCIENT 'twinlead' TV antenna wire with many skinned sections....no, still too much fuss. Ye...
by Lenp
Fri Dec 14, 2018 1:10 pm
Forum: General Discussion
Topic: need help to find blue led bulb
Replies: 17
Views: 609

Re: need help to find blue led bulb

Word on low voltage DC base configuration. If the two bottom contacts were used for the power,the polarity of the LED could easily be reversed, unless the side locating projections provided proper orientation, and obviously 'standard' bulbs don't have polarity issues. Yes, circuitry can be added to ...
by Lenp
Fri Dec 14, 2018 12:59 pm
Forum: General Discussion
Topic: Water Leak
Replies: 8
Views: 341

Re: Water Leak

Not thinking of any pressure scheme at all. There are too many variables in a well system (30-60 psi) so I am only considering physical water on a sensor, like interlaced foil on a pcb. I would put a high value resistor at the end of the foil pattern so a wire break could be detected. A micro's ADC ...
by Lenp
Thu Dec 13, 2018 1:27 pm
Forum: General Discussion
Topic: Water Leak
Replies: 8
Views: 341

Re: Water Leak

Thanks for that info, but that product is just ogging water consumption. If you're on the other side of the world, you get notified that you have a leak by telling you the horror of how many gallons you can expect to cleanup when you get back! Not good! I want to shut the system down when a leak is ...
by Lenp
Tue Dec 11, 2018 5:32 pm
Forum: General Discussion
Topic: ok,, New Project time,,,
Replies: 26
Views: 1563

Re: ok,, New Project time,,,

One pot....
One end to the source
One end to common
Center to the input
It's a classic voltage divider
by Lenp
Tue Dec 11, 2018 11:44 am
Forum: General Discussion
Topic: Water Leak
Replies: 8
Views: 341

Water Leak

We recently had a bad experience with a plumbing leak and I have decided it's time to do something proactive and install a leak detection and shut off system. There are many commercially available systems, and they use a motor driven water valve. I also want to also add a shut off for the well pump ...
by Lenp
Tue Dec 11, 2018 11:29 am
Forum: General Discussion
Topic: ok,, New Project time,,,
Replies: 26
Views: 1563

Re: ok,, New Project time,,,

When the math fails, resort to emperical observation, roughly translated - get a potentiometer and just diddle with it to see what works best! :grin:
by Lenp
Tue Dec 11, 2018 11:26 am
Forum: General Discussion
Topic: About to give up!
Replies: 4
Views: 178

Re: About to give up!

Hi Sean
Well, I guess I'm just 'special' in an odd sort of way! Let me know if anything is determined to squash the bug.
By the way it didn't happen with this response......????
Thanks,
by Lenp
Tue Dec 11, 2018 8:52 am
Forum: General Discussion
Topic: About to give up!
Replies: 4
Views: 178

Re: About to give up!

It's not the browser since it happens with my cell phone as well. Maybe somebody should check my account settings.
by Lenp
Mon Dec 10, 2018 10:45 pm
Forum: General Discussion
Topic: About to give up!
Replies: 4
Views: 178

About to give up!

Every time I move from the editor to preview my post I need to log in again and again and the post is dumped/ The 'remember me' box is checked but it looks like there is a bad bug. Anyone else experiencing this bad behavior? It seems to be more frequent when replying to a post rather than creating a...
by Lenp
Tue Nov 13, 2018 5:26 pm
Forum: General Discussion
Topic: HVAC Missing 'C' wire
Replies: 3
Views: 225

Re: HVAC Missing 'C' wire

Many thermostst cables are stapled inside finished walls and ceilings so it is not always a simple task to pull.one out and another in. The cost of this device is quickly exceeded by wire and the labor expense. If you DYI the circuit, the cost Is much less. Nope, I make nothing from the sale of thes...
by Lenp
Mon Nov 12, 2018 4:34 pm
Forum: General Discussion
Topic: Sysop Note: Logon Amnesia
Replies: 21
Views: 800

Re: Sysop Note: Logon Amnesia

Thank's Sean. Maybe it needs a dose of Milk of Amnesia! :grin:
by Lenp
Fri Nov 09, 2018 6:25 pm
Forum: General Discussion
Topic: How select the Commonly Used Electronic Components
Replies: 5
Views: 328

Re: How select the Commonly Used Electronic Components

What I think is most confusing for most is the sea of capacitor types and the best pick for the application. All types have specific attributes but I have not seen a lot of data on specific applications. The vendor's filters help to separate them but picking the right type is a different problem. Ma...