Search found 2768 matches

by haklesup
Tue Mar 12, 2019 12:38 pm
Forum: General Discussion
Topic: Any integrated circuit that works as the old tone decoder but for RF ?
Replies: 7
Views: 1685

Re: Any integrated circuit that works as the old tone decoder but for RF ?

Modern Bugs and WiFi hover near 2.4Mhz so its something else or older tech. maybe you can find a used Spectrum analyzer in an affordable range. here is an interesting Cell phone spectrum analyzer hack and product https://www.youtube.com/watch?v=zu-K1Sslw1Q https://www.youtube.com/watch?v=5LC7YYA6s4A
by haklesup
Mon Mar 11, 2019 3:07 pm
Forum: General Discussion
Topic: Any integrated circuit that works as the old tone decoder but for RF ?
Replies: 7
Views: 1685

Re: Any integrated circuit that works as the old tone decoder but for RF ?

I don't think so, most RF signals have digitally encoded data that do the work (or at least AM or FM modulation in an old system). Getting an FCC license to use a bunch of broadcast frequencies in an interference scheme seems unlikely. If you just want to detect either of these frequencies, then a r...
by haklesup
Mon Mar 11, 2019 11:36 am
Forum: General Discussion
Topic: Antenna Cable Routing.........
Replies: 9
Views: 1901

Re: Antenna Cable Routing.........

Earlier in this thread I complained about a cheap wall wart. When I opened it up, I found one of the 4 input rectified diodes with one leg not ever soldered to the board. it didn't fall out, it was far from the hole and clean. I'm shocked that it actually worked for several months like that
by haklesup
Fri Mar 08, 2019 2:09 pm
Forum: General Discussion
Topic: Energy problem solved!
Replies: 7
Views: 1890

Re: Energy problem solved!

Just a power factor corrector and not a very big one either. That youtube video was very good at explaining this product and its shortcomings Seems to be an incidence of taking real engineering theory and misapplying it to a situation to make money. Most inductive appliances already have PF correcti...
by haklesup
Fri Mar 08, 2019 1:55 pm
Forum: General Discussion
Topic: Antenna Cable Routing.........
Replies: 9
Views: 1901

Re: Antenna Cable Routing.........

My experience with RF antenna Splitters is that you can split 3 maybe 4 times at most and then the signal gets too low to be reliable. I recommend a powered amplified splitter if you do it that way but not for any cable that may go to a router. if that really is a 4 way switch then it appears you sp...
by haklesup
Thu Mar 07, 2019 11:35 am
Forum: General Discussion
Topic: Technology Backfire?
Replies: 38
Views: 4321

Re: Technology Backfire?

I would think the series resistance of a fuse is too low to use as a series resistor. Wouldn't you be looking at uV at the most a few mV differentials. I can't say I've tried because I am biased by that opinion. I'm inspired to get the meter in my first post's link for my explorer. I think the compo...
by haklesup
Wed Mar 06, 2019 4:25 pm
Forum: General Discussion
Topic: Technology Backfire?
Replies: 38
Views: 4321

Re: Technology Backfire?

Even before you start pulling fuses you will want to figure out how many standby states the car has by observing the total standby current over a period of time with and without the key fob nearby perhaps jiggling the car to stimulate an oversensitive position sensor, opening various doors, unlocked...
by haklesup
Mon Mar 04, 2019 12:01 pm
Forum: General Discussion
Topic: Technology Backfire?
Replies: 38
Views: 4321

Re: Technology Backfire?

Lenp, How cold? Its well known that batteries have less capacity in the cold. What is 3-4 days reserve in February might be better when things warm up. I agree it should be more than a week, really you need 2 weeks if you ever want to go on vacation and park at the airport. In my car, the dash cam c...
by haklesup
Fri Mar 01, 2019 1:23 pm
Forum: General Discussion
Topic: Technology Backfire?
Replies: 38
Views: 4321

Re: Technology Backfire?

I've been eyeing this for a while https://www.ebay.com/itm/120V-100A-Battery-Monitor-Meter-DC-VOLT-AMP-temperature-Capacity-power-coulomb/113123071952 it would at least give you the data you need to objectively diagnose the issue. you can deactivate branch circuits one at a time by pulling fuses and...
by haklesup
Tue Feb 19, 2019 11:04 am
Forum: General Discussion
Topic: Odd Commercial Products.........
Replies: 90
Views: 11549

Re: Odd Commercial Products.........

Instructions should read: Put the butter or syrup on the paddles, rub together and yell "Clear" as you press them on the bread when the whining noise reaches a high pitch. Must have a M.D. and license to prescribe to purchase. I guess the gift market for ER doctors wasn't big enough and It's a prett...
by haklesup
Fri Feb 15, 2019 4:59 pm
Forum: Robotics
Topic: Depth-rated Servo
Replies: 1
Views: 3624

Re: Depth-rated Servo

I don't really have any application but I was curious, do you plan to seal the unit with gas inside or backfill with some kind of incompressible inert fluid to keep differential pressure across the seals low?
by haklesup
Fri Feb 15, 2019 4:50 pm
Forum: Reader Projects
Topic: Reel for lowering a sensor
Replies: 6
Views: 5371

Re: Reel for lowering a sensor

Take a look for "Gear Motor" on ebay or google image search. These will give you the reduction in shaft speed and increase in torque you likely need. There are many voltage, speed and torque ranges so you should be able to find a fit for your application Most have output to a shaft but you shouldn't...
by haklesup
Thu Feb 14, 2019 12:50 pm
Forum: General Discussion
Topic: surge voltages
Replies: 11
Views: 2052

Re: surge voltages

Just like HDDs there are multiple Reliability grades of SDD drives and solid state memory, one can get a more robust drive for more money but surges in PCs tend to kill the power supply and not so often the parts on the other side of the PS. A PS failure however can subject the motherboard and perip...
by haklesup
Mon Feb 11, 2019 12:31 pm
Forum: General Discussion
Topic: Television Conundrum SOLVED.......
Replies: 14
Views: 2382

Re: Television Conundrum.......

If a charity will take it at a manned donation station, Fine. But don't dump it in or beside an unmanned clothing/shoe drop off, that's just pushing it off onto someone else who still may have to pay. My Goodwill has a sign saying do not leave donations when unmanned, it may be considered illegal du...
by haklesup
Fri Feb 08, 2019 11:46 am
Forum: General Discussion
Topic: Television Conundrum SOLVED.......
Replies: 14
Views: 2382

Re: Television Conundrum.......

I loved PIP and simply can't understand why a modern 4k TV doesn't have it by now. I gave it a pass on the early generations but present chipsets have plenty of speed and bandwidth to accomplish the task. I had split screen on my 2016 Samsung and could at least use the browser and watch OTA TV (not ...