In the diagram below, 'fuse A' would not need to be any larger than 1 amp (it MUST be rated to protect the wire feeding the switch from a short circuit). Fuse 'B' MUST be rated to protect the wire feeding the relay (in case of a short circuit). It should also be smaller than the current rating of the relay.
This shows how to wire a switch so that you can turn your fans (or any other device connected to the relay) off if you want. You can see that the switch is in series with the remote lead. For the relay to switch on, 2 things must happen. The remote lead must be high (no, not on drugs.. the head unit must be on) AND the switch must be switched to the on position (position B).
NOTE: The diode will prevent inductive kickback from the relay coil from damaging the switch contacts.
This site introduces you to macro photography. Macro photography is nothing more than the photography of small objects. It can take quite a while to understand the limitations associated with this type of photography. Without help, people will struggle to get good images. Understanding what's possible and what's not possible makes the task much easier. If you need to photograph relatively small objects (6" in height/width down to a few thousandths of an inch), this site will help.
If you're interested in air rifles, this site will introduce you to the types of rifles available and many of the things you'll need to know to shoot accurately. It also touches on field target competition. There are links to some of the better sites and forums as well as a collection of interactive demos.
This site helps anyone new to computers and anyone with a basic understanding of computers with a desire to learn more about the internal components of a computer. If you have a computer that you'd like to upgrade but don't know where to start, this is a good site for you.
This site is for those who want to begin racing karts but don't fully understand how the various parts work. It's mostly interactive demos that show how the various parts of the kart work.
Click HERE to visit a friend's new car audio tech site.
