Search found 2767 matches

by haklesup
Tue Dec 17, 2002 6:13 pm
Forum: General Discussion
Topic: Hollywood tracker beacon?
Replies: 9
Views: 1715

Re: Hollywood tracker beacon?

A bit more on avalanche beacons can be found here:http://www.couloirmag.com/gear/reviews/accessories/beacons99/beacons99.htm<p>I think that the beeping reciever you describe from the movies would probably work like this: The transmitter would be a continuous wave TX at a relatively low frequency of ...
by haklesup
Sun Dec 15, 2002 7:10 pm
Forum: General Discussion
Topic: NANOSTYK
Replies: 2
Views: 630

Re: NANOSTYK

If I read you right, you want to market this ruler and make some $. I know a few teachers and they are all experts at begging for materials and educational discounts, there simply isn't much money in the school systems. Your only chance might be to sell it to an educational publisher or maybe the di...
by haklesup
Thu Dec 05, 2002 5:20 pm
Forum: General Discussion
Topic: Waves Converter
Replies: 38
Views: 5437

Re: Waves Converter

Seems to me that most digital phones would simply switch over to Analog mode if it couldn't lock onto a Digital tower. You would have the honor of draining their batteries faster though. Perhaps pulsing the jammer output would cause a dropped call as fast as it came in.
by haklesup
Mon Nov 25, 2002 4:23 pm
Forum: General Discussion
Topic: PCB CAD viewer
Replies: 1
Views: 451

Re: PCB CAD viewer

What program generated the .CAD file? I find that the design files made by most PCB CAD programs (whatever the extension)are propriatary and can only be viewed in the native program. Generally you may be able to port a netlist or a set of gerber files but not much more.<p>Try these links as a starti...
by haklesup
Fri Nov 01, 2002 3:01 pm
Forum: General Discussion
Topic: Metal Enclosures
Replies: 4
Views: 1818

Re: Metal Enclosures

As you probably have seen from the catalogs you mentioned, BUDD is a popular Brand. Hammond amkes stuff too but mostly industrial.<p>Whenever I am not sure of the best vendor, I turn to a buying guide like <p> www.thomasregional.com or www.electronicssourcebook.com <p>for lists of manufacturers segr...
by haklesup
Tue Oct 08, 2002 12:03 pm
Forum: General Discussion
Topic: Drilling out PCBs
Replies: 11
Views: 1944

Re: Drilling out PCBs

Check out this link http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=34640 <p>50 piece set of just the right sizes for only $13 and they should fit in your dremel.<p>In case the link fails their item # is 34640-2VGA or search on "micro" I had trouble finding them searching on "drill ...
by haklesup
Tue Oct 01, 2002 5:30 pm
Forum: General Discussion
Topic: LED tail light bulbs
Replies: 11
Views: 2153

Re: LED tail light bulbs

Try rigging a float switch (normally closed)to interrupt the current to the bulb either directly or with a relay. Mount the switch on the back of the licence plate holder or any other convenient location below the lamps. Shield the float and switch from wind and road debris inside a section of pipe ...
by haklesup
Mon Sep 23, 2002 4:44 pm
Forum: General Discussion
Topic: PC ps into testbench supply?
Replies: 7
Views: 1234

Re: PC ps into testbench supply?

you could use the +12V and -12V supplies together to get an effective 24V source, then use the -12V output as your new ground. one limitation is that you can't use the 5V outputs at the same time since there ground is at a different potential. Another concern is that on many supplies, the -12V suppl...
by haklesup
Fri Sep 20, 2002 11:31 am
Forum: General Discussion
Topic: WAVETEK SAM 1000 (Sig Analysis Meter)
Replies: 3
Views: 741

Re: WAVETEK SAM 1000 (Sig Analysis Meter)

First off, NiCad batteries have a terrible shelf life. If this thing is more than a few years old, the batteries may not take a charge anyway.<p>How many batteries. Normally 1.4V per cell. Charge voltage is a volt or two above the battery voltage. Current regulation is necessary to prevent overheati...
by haklesup
Fri Sep 20, 2002 11:12 am
Forum: General Discussion
Topic: PC ps into testbench supply?
Replies: 7
Views: 1234

Re: PC ps into testbench supply?

AT power supplies are no problem, they power up as soon as you plug them in but ATX power supplies have a sense line ( blue wire I think but it may be the orange one)and it has to be connected to ground (I believe but it may be one of the red 5V lines) before it will power up at all. Normally this i...
by haklesup
Sun Sep 15, 2002 10:16 pm
Forum: General Discussion
Topic: Hold Button
Replies: 2
Views: 676

Re: Hold Button

Cheap maybe but not lazy. Buying an electronic phone with a hold button is easier than building one.<p>I found 2 curcuits in my books. One is complicated with lots of components but one is very simple<p>Draw a circuit with the red wire at the top and the green at the bottom. Between the two place a ...
by haklesup
Tue Sep 03, 2002 3:16 pm
Forum: General Discussion
Topic: Ionic Breeze
Replies: 6
Views: 1185

Re: Ionic Breeze

Wall soiling is typical of continuous duty negative ion generators, the wall is more positive than the ions thus the attraction). The one on TV claims to have a positive collection grid along with the neg ion generator. I have read that this will keep the walls clean until the collection plate gets ...
by haklesup
Sun Sep 01, 2002 4:26 pm
Forum: General Discussion
Topic: Ionic Breeze
Replies: 6
Views: 1185

Ionic Breeze

I've been watching the ad for the "Ionic Breeze" air cleaner and wondering if I could build one using an old negative ion generator PCB I have. My questions are : 1. what is the configuration of the positive and negative electrodes? 2. How much HV is needed? Is it a function of the area of the elect...
by haklesup
Fri Aug 30, 2002 9:55 pm
Forum: General Discussion
Topic: Calibrated Dials
Replies: 4
Views: 1037

Re: Calibrated Dials

I've never heard of a program specifically for that but you should get good results from just about any good graphics program. I use Adobe Illustrator to make faceplates for instrumnets (which have included markings like you describe, though not on the knob). I save in the native format and the silk...
by haklesup
Fri Aug 30, 2002 9:42 pm
Forum: General Discussion
Topic: animal tracking transmitter
Replies: 13
Views: 2618

Re: animal tracking transmitter

Looked at the circuit, deceptively simple. Hard to say what's wrong without hands on but there are a few things I noticed.<p>1. Construction counts, especially in RF circuits. Not so much a quality issue but for example you don't want the inductors to be too close together or they could share a B fi...