Search found 9 matches

by techno
Mon May 10, 2004 7:40 pm
Forum: General Discussion
Topic: Transistorized water flow?
Replies: 18
Views: 4577

Re: Transistorized water flow?

When your neigbors water their lawns the water pressure will drop. When they don't it goes up. I almost watered my convertable because of this. Sprinkler adjusted when pressure was low. Pressure went up and so did the water.
by techno
Sat May 08, 2004 3:31 pm
Forum: General Discussion
Topic: Transistorized water flow?
Replies: 18
Views: 4577

Re: Transistorized water flow?

Sensing the temperature isn't going to work. It isn't taking in humidity at that temperature. Imagine a 75* day thats raining? Or one that is close to raining.There isn't any feedback but a whole lot of finagling to get it tuned. Sense the water level and have that sensor open/close a valve. It does...
by techno
Tue May 04, 2004 4:35 pm
Forum: Robotics
Topic: CNC question
Replies: 12
Views: 5566

Re: CNC question

http://pub42.bravenet.com/forum/show.php?usernum=3548766086&cpv=1 <p>Had a short thread on this (quite a while ago) and it was very cheap. Most of them were doing soft stuff foam and plastic but just beefing it up should work. Aluminum isn't too hard. The thread and links had both kinds. The table ...
by techno
Mon May 03, 2004 6:10 pm
Forum: General Discussion
Topic: Charging 12V Battery while riding Bicycle
Replies: 19
Views: 4867

Re: Charging 12V Battery while riding Bicycle

Another way to do this is a rube goldburg. Use the 6 volts to power a 6v motor. This drives a 12 volt motor which outputs 12 volts(actually slightly less due to loss). Speeds still need to be matched but its now an electic transmission so to speak. Just step the speed up a bit with gears or choose t...
by techno
Mon May 03, 2004 5:42 pm
Forum: General Discussion
Topic: Electrolysis
Replies: 9
Views: 2433

Re: Electrolysis

Not sure but I think Nuke subs do this. This is how they get their oxygen but not sure if they also get water from this method or not. Recombine the Oxygen and Hydrogen since they have the power.<p>BTW pure water has a dielectric strength of 40Kv. I remember because I read it as 14 KV and built a sp...
by techno
Fri Apr 30, 2004 3:35 pm
Forum: General Discussion
Topic: 100w bulb in 40w max desk lamp
Replies: 13
Views: 3913

Re: 100w bulb in 40w max desk lamp

Mr Bwtz Your blowing the circuit since it is overloaded. This is common in Kitchens where a toaster and other items are being used all at the same time, eventually the total load is higher than the fuse or breaker is for. The mystery item is probably the refrigerator. Off now but kicks on- the load ...
by techno
Wed Apr 28, 2004 5:15 pm
Forum: General Discussion
Topic: H bridge mosfet choice?
Replies: 7
Views: 2082

Re: H bridge mosfet choice?

maxium? I couldn't even find thier site!
by techno
Sat Apr 24, 2004 1:10 pm
Forum: General Discussion
Topic: H bridge mosfet choice?
Replies: 7
Views: 2082

Re: H bridge mosfet choice?

Thanks for the leads I'll have to do some more search and learn. I haven't studied the H-bridge just assumed to copy it :D Thats why I was stumpified by the amp/wattage deal.<p>Do need reverse though. A motor in each sponson is the setup and on-off- reverse is the only control over them. No steering...
by techno
Sat Apr 24, 2004 8:10 am
Forum: General Discussion
Topic: H bridge mosfet choice?
Replies: 7
Views: 2082

H bridge mosfet choice?

The motor drives for my boat are about 3 hp x 2 and this means 200 amps at 12 volts! I can't find any pre-schematic and not sure how to choose a mosfet for this power level. Does the thing need to be rated for this 200 amps or less? If this don't work I'll use plan A and have servo controlled switch...