I have a simple battery/electromagnet setup. Does anyone know how I could set up a switch to reverse the polarity of the electromagnet? (Besides switching the wires on the battery)
- posted
19 years ago
Reverese polarity of electromagnet
Loading thread data ...
- Vote on answer
- posted
19 years ago
[snip]
If it's not centre-off, make sure it's a break-before-make switch!
Tim
-- Guns Don?t Kill People, Rappers Do.
- Vote on answer
- posted
19 years ago
A simple DPDT switch will do the trick: (view with a fixed font)
- --+--o | \----o magnet + | -o | | ---o \----o magnet -
- ----+o
If you take a switch with 3 positions the middle position will turn the magnet off
- Vote on answer
- posted
19 years ago
Sorry, but your schematics do not work. I think this one will be better...
- --+---o | \----o magnet + | +-o | |
- ----+-o | \----o magnet - +---o
Never forget the make a design review ;-) Claude
- Vote on answer
- posted
19 years ago
Now is there any kind of switch that will reverse the polarity of the coil electrically like in this picture?
formatting link
Once a current is applied to the red switch, it reverses the polarity of the coil as long as the current is applied. If this sounds ridiculous, don't blame me since I may have no idea what I'm talking about.
- Vote on answer
- posted
19 years ago
your schematics do not work.
The "red switch" would be a double pole, double throw relay, with its contacts wired as shown above (but you'd probably also want another switch to turn the coil off...)
-- Peter Bennett, VE7CEI peterbb4 (at) interchange.ubc.ca new newsgroup users info : http://vancouver-webpages.com/nnq GPS and NMEA info: http://vancouver-webpages.com/peter Vancouver Power Squadron: http://vancouver.powersquadron.ca
- Vote on answer
- posted
19 years ago
--
This is seb; don't worry about it.
Here's one way to do it:
BAT+>--------+---------------------------+--O--> | S1
| | |
BAT->----+-----------------+ | O
| | NC K1A NO | NC K1B NO| |
| O-->\ \
- Vote on answer
- posted
19 years ago
Could you refer me to more specific information about a double pole, double throw relay? Thanks.
- Vote on answer
- posted
19 years ago
See
formatting link
?Ref=255055&Row=258133&Site=US or search
formatting link
for "dpdt relay"
-- Peter Bennett, VE7CEI peterbb4 (at) interchange.ubc.ca new newsgroup users info : http://vancouver-webpages.com/nnq GPS and NMEA info: http://vancouver-webpages.com/peter Vancouver Power Squadron: http://vancouver.powersquadron.ca