Search found 3680 matches

by Chris Smith
Thu Aug 23, 2007 10:01 pm
Forum: General Discussion
Topic: alarm contacts
Replies: 5
Views: 3548

$2.75 each at All Electronics http://www.allelectronics.com/cgi-bin/category/700025/Alarm.html http://www.allelectronics.com/cgi-bin/item/MS-11/700025/PRESS_FIT_MAGNET_SWITCH_.html ******************* Starting at $2.80 http://search.homesecuritystore.com/search.aspx?sKeyword=magnetic+door+contacts *...
by Chris Smith
Thu Aug 23, 2007 5:18 pm
Forum: General Discussion
Topic: A little earth ground humor
Replies: 100
Views: 203202

We used to have a great humorist here, but he left.

I guess each one finds humor where they can.
by Chris Smith
Thu Aug 23, 2007 5:13 pm
Forum: General Discussion
Topic: alarm contacts
Replies: 5
Views: 3548

A lot of companies still sell them.

I have a lot of the bi metal 2 piece contacts but I think "Door King" sells alarm systems as well as gate openers.

Also always try "all electronics".
by Chris Smith
Thu Aug 23, 2007 2:39 pm
Forum: General Discussion
Topic: A little earth ground humor
Replies: 100
Views: 203202

I was, thats why I added in Al Bundy, goofy as it gets.
by Chris Smith
Thu Aug 23, 2007 12:04 pm
Forum: General Discussion
Topic: A little earth ground humor
Replies: 100
Views: 203202

Almost as good as asking the wife on TV, what is the light switch for? Up and down goes the neighbors garage door. What keeps them all alive is the blind attitude that "well I don’t know" ? If they did find out its always.... Im not an electrician? But Al Bundy showed us all why you shou...
by Chris Smith
Thu Aug 23, 2007 11:40 am
Forum: General Discussion
Topic: ceiling fan speed controls
Replies: 13
Views: 6411

Shorted widings can make one speed run, also switches but usually they fall apart then short. If you are using caps, yes they could be blown, which is back to bad wiring, reverse polarity, buzzing CBs etc. A poor ground/ neutral will increase the return wire resistance. The strain on it could cause ...
by Chris Smith
Thu Aug 23, 2007 8:47 am
Forum: General Discussion
Topic: ceiling fan speed controls
Replies: 13
Views: 6411

Start with your grounds, and if you’re a mobile / modular home, extra grounds on the body are required. See if your bonded at the panel for neutral to ground also, while some fans don’t have a controller, they wire the motor windings for the different speeds, then chose that wiring on the switch...
by Chris Smith
Wed Aug 22, 2007 6:20 pm
Forum: General Discussion
Topic: Revers Polarity Protection
Replies: 19
Views: 10054

In the hundreds of examples of using the diodes to block any cross fire back to a parallel circuit in a VR, I never had any problems. [heat yes] It wasn’t like you ramp it up, and one VR conducts, the other is delayed, it was more like on and off, while both were protected from interference and cr...
by Chris Smith
Wed Aug 22, 2007 6:02 pm
Forum: General Discussion
Topic: Voltage Controlled Voltage Amplifier/ Mr. Al
Replies: 29
Views: 12426

They rate it at normal air, or forced air. Those usually work better but as I said they don’t have the CPU types that I always used, tons of fins, thin aluminum, 2 inch cube, and with a fan, they ran real cold on hot items. My basis here was visual, rather than the tried and true from the past. Th...
by Chris Smith
Wed Aug 22, 2007 4:54 pm
Forum: General Discussion
Topic: Revers Polarity Protection
Replies: 19
Views: 10054

Its ambiguous and a conflict to say in one PS, diodes are bad, but in the next they are the cure? In both circumstances they may cure the problem, or perhaps not, but as a learner all options should be on the board, and tried for the learning experiences of building that project. Yes and No leaves m...
by Chris Smith
Wed Aug 22, 2007 8:25 am
Forum: General Discussion
Topic: Revers Polarity Protection
Replies: 19
Views: 10054

A rectifier bridge will sort out the correct polarity, no matter what direction the pole are, as long as the voltage is high enough to over come the slight drop. Even AC will be corrected into DC but you dont have any filters so ripple will come through. I placed one on my Timming light that was 12 ...
by Chris Smith
Tue Aug 21, 2007 9:41 pm
Forum: General Discussion
Topic: Revers Polarity Protection
Replies: 19
Views: 10054

absolutely not I’ve seen this misconception before from others. The assumption that a diode only drops its rated Vf (forward voltage) value without regard for the current flowing through it. A diode only has this rated voltage drop just after it turns on and with the current through it generally ...
by Chris Smith
Tue Aug 21, 2007 8:16 pm
Forum: General Discussion
Topic: Analog Speech scrambler
Replies: 14
Views: 7931

What radio freq are you on, and is side band enough? Jumbling can occur many ways. If you only want to screw with the government, make up a fake dialog, let them get sucked in, and bleed them dry. Its worth every second.....[ mine was two years] Dumb and dumber The bigger the false story, the more t...
by Chris Smith
Tue Aug 21, 2007 4:31 pm
Forum: General Discussion
Topic: Voltage Controlled Voltage Amplifier/ Mr. Al
Replies: 29
Views: 12426

The part I came up with was the ..........532568303B00 E style T-03

http://www.mouser.com/catalog/631/1702.pdf

My favorite was the CPU type which they didn’t have, but theirs was the thickest metal with the most amount of fins, and fans were suggested if needed.
by Chris Smith
Tue Aug 21, 2007 9:39 am
Forum: General Discussion
Topic: Revers Polarity Protection
Replies: 19
Views: 10054

From what I can see in the photo, a simple bridge rectifier will steer the power in the right direction no matter what the input is.

The only draw back is will the diodes drop the voltage too much from the PS for the device to operate?