Subject:
|
Re: Voltage generator
|
Newsgroups:
|
lugnet.robotics
|
Date:
|
Wed, 20 Jan 1999 18:59:54 GMT
|
Original-From:
|
Peter Hesketh <pbh@phesk.demon.#stopspammers#co.uk>
|
Viewed:
|
897 times
|
| |
|
|
In article <Pine.GSO.3.96.990120090008.21321D-100000@frodo.uen.org>,
jeff <jeff@uen.org> writes
> Interesting you should mention that. I've been toying with the idea of
> making a anenometer (wind speed tester) from a motor, but haven't over
> come the idea of how to calibrate it.
Wait for a calm day and mount it 3 ft above a car, or on the front of a
bike with a speedometer. Make several runs in opposite directions at
constant speed and take the average.
Alternatively, drill a hole half way along a broom handle and place it
on a lidless record player. Put the anemometer at one end and a
counterbalance at the other. Speed can be calculated from radius and
rpm.
> You'd need to place a resistor in
> line to help avoid damage to the RCX though.
It depends on the motor and the speed of the wind. and anyway, a
resistor on its own would not necessarily reduce the voltage. A series
resistor and parallel zener diode would be safest.
Another way is to attache a propeller to a rotation sensor. No voltage
limiting required.
--
Regards - Peter Hesketh, Mynyddbach, Mon.
Forty reasons why a dog is better than a woman: number 19
"You don't dread a visit from a dog's parents"
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
|
|
Message is in Reply To:
 | | Re: Voltage generator
|
| Bill, Interesting you should mention that. I've been toying with the idea of making a anenometer (wind speed tester) from a motor, but haven't over come the idea of how to calibrate it. You'd need to place a resistor in line to help avoid damage to (...) (25 years ago, 20-Jan-99, to lugnet.robotics)
|
17 Messages in This Thread:
 
 
- Entire Thread on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
|
|
|
|
