Distance & Speed Measurer, Wireless
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I have an need for a device that does the following:
Counts a pulse (from a disk that has ~20 magnets)
Processes the info (pulses to inches, pulses to mph)
If mph = X then close relay
Transmit data to another stamp (using the rf modules from parallax)
I know that this is all possible, but I have never used a stamp
before, and have only a little electronics knowledge.
Your help is appreciated,
Marlin Schrock
Counts a pulse (from a disk that has ~20 magnets)
Processes the info (pulses to inches, pulses to mph)
If mph = X then close relay
Transmit data to another stamp (using the rf modules from parallax)
I know that this is all possible, but I have never used a stamp
before, and have only a little electronics knowledge.
Your help is appreciated,
Marlin Schrock
Comments
speed and time accuracy. Refer Stamp manual for COUNT command. You also
will need a Hall effec magnetic sensor. Remember also integer 16 bit
math of Stamp. If you have the Stamp, all the parts and time go ahead.We
will help if you ask.
ACJacques
ih_660@y... wrote:
>
> I have an need for a device that does the following:
>
> Counts a pulse (from a disk that has ~20 magnets)
> Processes the info (pulses to inches, pulses to mph)
> If mph = X then close relay
> Transmit data to another stamp (using the rf modules from parallax)
>
> I know that this is all possible, but I have never used a stamp
> before, and have only a little electronics knowledge.
>
> Your help is appreciated,
>
> Marlin Schrock
Hi Marlin -
Counts a pulse (from a disk that has ~20 magnets)
Processes the info (pulses to inches, pulses to mph)
Essentially you are describing a Hall Effect sensor. One source for suchsensors is Allegro Micro at [noparse]/noparse][url=http://www.allegro-micro.com/]http://www.allegro-micro.com[/url. You might check their Selector Guide of Sensors at:
·············· [noparse][[/noparse] http://www.allegromicro.com/selguide/hed1.htm ]
Transmit data to another stamp (using the rf modules from parallax)
[font=Arial, Helvetica]The UGQ5140K unipolar Hall effect switch is a monolithic integrated circuit designed for magnetic actuation of low-power incandescent lamps or inductive loads such as relays or solenoids. Included on chip is a Darlington power output that is capable of continuously sinking in excess of 300 mA. Internal protection circuitry limits surge (lamp turn-ON) or fault currents to approximately 900 mA.
A sensitive magnetic threshold allows the device to be used in con-junction with inexpensive magnets or in applications that require relatively large operating distances.
[/font]
before, and have only a little electronics knowledge.
Your help is appreciated,
Regards,
Bruce Bates
count the pulses in 1 second and divide by 20, you will get rotations per
second.
multiply by 6.28 to get rad/s.
v=w * r
v=linear velocity (m/s)
w=angular velocity (rad/s)
r=radius (m)
you will get m/s.
multiply by 2.2369 to convert to mph.
be sure that its sensor supports the maximum rotation and that doesn't have
skidding.
sds
Fabiano
Original Message
From: <ih_660@y...>
To: <basicstamps@egroups.com>
Sent: Tuesday, November 21, 2000 10:10 AM
Subject: [noparse][[/noparse]basicstamps] Distance & Speed Measurer, Wireless
> I have an need for a device that does the following:
>
> Counts a pulse (from a disk that has ~20 magnets)
> Processes the info (pulses to inches, pulses to mph)
> If mph = X then close relay
> Transmit data to another stamp (using the rf modules from parallax)
>
> I know that this is all possible, but I have never used a stamp
> before, and have only a little electronics knowledge.
>
> Your help is appreciated,
>
> Marlin Schrock
>
>
>
>
>
>
I have been trying to come up with a similar solution for counting pulses.
Has anyone tried to use the Hamamatsu P5587 Photoreflector with the Basic
Stamp? (I have a bunch of these and have seen them used on the Rug Warrior
Pro robots).
What I have so far is printed encoder wheels that have black strips on it
with a white background attached to each wheel.
Original Message
From: "Fabiano Bovo" <go_robot@t...>
To: <basicstamps@egroups.com>
Sent: Tuesday, November 21, 2000 8:30 AM
Subject: Re: [noparse][[/noparse]basicstamps] Distance & Speed Measurer, Wireless
> To obtain the speed:
> count the pulses in 1 second and divide by 20, you will get rotations per
> second.
> multiply by 6.28 to get rad/s.
> v=w * r
> v=linear velocity (m/s)
> w=angular velocity (rad/s)
> r=radius (m)
> you will get m/s.
> multiply by 2.2369 to convert to mph.
> be sure that its sensor supports the maximum rotation and that doesn't
have
> skidding.
>
> sds
> Fabiano
>
>
>
Original Message
> From: <ih_660@y...>
> To: <basicstamps@egroups.com>
> Sent: Tuesday, November 21, 2000 10:10 AM
> Subject: [noparse][[/noparse]basicstamps] Distance & Speed Measurer, Wireless
>
>
> > I have an need for a device that does the following:
> >
> > Counts a pulse (from a disk that has ~20 magnets)
> > Processes the info (pulses to inches, pulses to mph)
> > If mph = X then close relay
> > Transmit data to another stamp (using the rf modules from parallax)
> >
> > I know that this is all possible, but I have never used a stamp
> > before, and have only a little electronics knowledge.
> >
> > Your help is appreciated,
> >
> > Marlin Schrock
> >
> >
> >
> >
> >
> >
>
>
>
>