what are double pole switches?
115772
Yes, a double-pole switch opens and closes two wires of the same circuit, or two independent circuits.  I believe electro-fogey was thinking of double-throw switches.
508515
Is it a Single Pole Single Throw or Single Pole Double Throw relay (specify the model and I will send you a simple schematic wiring diagram in your email)? Please specify the exact use of the relay on the Tattoo machine. If used as a power switch only, better buy an ordinary SPST switch which does not require any external power source and can be operated manually. For SPDT relays, you need an external DC supply to enable the coil of the relay in order to switch the contacts to Normally Close (NC) contact point. The relay is defualted at Normally Open (NO) if coil is not energized.
773145
http://www.digchip.com/datasheets/parts/datasheet/280/MAX4603.php\n\nFour switches, two NC and two NO. Used in Relay Replacement, Test Equipment, Communication Systems, PBX, PABX Systems, Audio-Signal Routing. \n\nthe complete datasheet can be found on maxim-ic site:
490737
Technically it has to be crossover BUT...\n\nNewer switches can auto sense the type of cable and electronically switch the port to crossover instead of you having to use one so a straight-through will most likely work. With an older switch there should be an uplink port with a switch to change that port from normal to crossover.
23963
You may be able to wire together (solder and wire) adjacent pairs such that two positions act as one.  Thus you will have three pairs instead of six singles.  For a DC circuit, connect the positive poles for positions one and two then connect the negative poles for one and two. Connect leads to the poles of either position.  When you select either position one or two the circuit will be completed without a dead spot.  This will work for AC circuits but poles are positive and negative only instantaneously.  Be sure that circuit logic and connection of loads permit this modification (I Don't have your diagram).  Do this two more times.  Good luck.
430412
The wires are placed on the poles according to their voltage - highest voltage on top (farthest away from people) and lowest on the bottom. This means the bottom one(s) is usually telephone (12 volts), then cable tv (30 volts) then the "secondaries" which are what your house runs on (220 volts) and then all the way up top, the "primaries" which carry electricity over long distances, and are usually 13,600 volts.
688300
Conductors and insulators are only building materials that provide the means for directing data from one point to another. The functionality of manipulating data comes from the special properties of semiconductors, which can be made to amplify a signal (i.e., a variation in voltage). \nWhen connected together, two very simple amplifiers (possibly as simple as one transistor each) can make a bistable circuit, one which always has one transistor conducting and the other cut off. These bistable circuits, called flipflops, can store one binary digit (bit) of information: one state, with transistor A on and B off, is considered "0" and the opposite state is "1". So a single flipflop can take the role of one bit of memory. A flipflop can be triggered to go from one state to another. When connected so one flipflop's change of state in one direction (say from 1 to 0) triggers a change (from 0 to 1 or from 1 to 0) in the next flipflop, you have the beginning of a binary counter. Similarly, flipflops in other connections can form arithmetic registers, in which two binary numbers can be compared, added, and otherise manipulated. Building on these simple forms, complex logical and arithmetic functions can be implemented.\nThe above only describes digital circuits. Semiconductor amplifiers are also used in analog and hybrid (part digital, part analog) microcircuits.
186229
Here are some sites that may help.  Both have circuit examples utilizing LVDT's.  Hope this helps.
527727
A number of companies manufacture a switch that allows two computers to be used from the same keyboard / mouse / monitor... Some switches can have 3 and 4 computers run from the same controls... Check out tigerdirect.com compusa.com\nand other big retailers to see who has what available today.\nThese types of devices have been manufactured since the 286,\nbut come and go on the fringe market... There are some with old 9 pin mouse, large DIN keyboard ports ( XT / AT keyboards ) and even 9 pin TTL / EGA monitor plugs, while now, they are made with PS/2 mice, 15 pin monitor plugs, and\nsmall DIN PS2 keyboard plugs...  I see these devices from time to time, but pricing and availability change daily, since only a few people use them... \n Products at Tiger like:\nB451-3028\nB451-3026\n are tiny everyday use, but you can pay hundreds of dollars for electronic, high-end switches that use expensive Dual-PCI-express videos or HDTV / DVI etc. monitor outputs...\n hope this helps
135940
The previous answers are all correct, but here's a practical example that might help explain a one possible use (amongst many, of course).\n\nLet's say that you have two light bulbs and three single pole switches.  You want switch one to turn on light 1, switch two to turn on light 2 and switch three to turn on both lights.  Wiring switches one and two should be no problem, but when you introduce switch three, you have a problem.  Since it is a single pole switch, you need to connect both lights to the same terminal, and now when you throw either switch 1 or 2, both lights come on.   Now if you put a diode to each light from switch three, you can keep current from both switch one and switch two from flowing back through the shared terminal of switch three and lighting the other bulb.\n\nAlso keep in mind that there are special kinds of diodes, such as Zener diodes which are used to generate a constant voltage reference sometimes needed in electronic circuits, or as used in a voltage regulator.  A standard switching diode can also be used to provide a 0.7V voltage drop for various purposes as well.
210344
I used true wizard true switch.
51082
Many. I most often use Switchboard and Anywho. Lots listed at the link below.
1111658
http://www.epanorama.net/circuits/vga2rgbs.html
907372
A magnet whose magnetic properties is dependent on current flow.
263532
go to www.switchboard.com  and look them up.
1113098
Circuit breakers can have either 1 or 2 breaks/pole.\nA single break has a fixed contact portion and a movable contact portion. This type of break has to carry the whole of the breaking current.\nA double break has the movable portion with contacts at either end breaking from two fixed contacts. This halves the breaking current.
761136
Threw the books away years ago so dont have a pinout...If its the DB62 to DB15 cable Pacific Cable has it for $24.\nhttp://www.pacificcable.com/Allen-Bradley-Rockwell-Automation-Cables.html\n\nThat's an old plc...sorry for your luck.