[chbot] Hall Effect Sensor

[jimmy allen]

That ultrasonic demo sounds really cool.Is it like a radar?

On 7/19/09, Richard Jones <rjtp at ihug.co.nz> wrote:
> Jimmy,
>
> There is some good reference material on Hall Effect devices here:
> http://content.honeywell.com/sensing/prodinfo/solidstate/technical/hallbook.pdf
> Figures 4.25 and 4.27 look appropriate to the UGN3503U.
>
> Using the Parallax Propeller you may be able to digitise the signal
> directly using the sigma/delta conversion trick built into the propeller.
> From memory you need two port pins, a couple of resistors and a capacitor
> per analogue input. For simple software each input also needs one cog. I
> did a demo a while back which used the propeller to display ultrasonic
> echoes on a vga monitor. The same trick could almost certainly be applied
> to hall effect devices.
> See: http://kiwibots.org/articles/propeller-ultrasonic-vga-demo-2.html
>
> Richard
>
> On Fri, 17 Jul 2009 13:51:13 +1200, jimmy allen <jimmy1248 at gmail.com>
> wrote:
>> i am going to try and use it to get angles.i am going to attach the
>> sensor to the bottom of a pendulum and have a mounted magnet bellow it
>> and get the sensor to give out read proportional to distance and the i
>> will be able to calculate the angle
>>
>>
>> On 7/17/09, Charles Manning <manningc2 at actrix.gen.nz> wrote:
>>> Apart from setting up the ADC (which is hardware dependent) there's
>>> nothing
>>> much to it. Just read the ADC.
>>>
>>> What are you trying to do with this? Unless you need an analogue
>>> measurement
>>> it is way easier to interface to a switch type hall effect sensor eg.
>>>
> http://www.sicom.co.nz/xurl/PageID/2214/function/viewprd/prd_id/172816/pmm_id/0/hall-effect-switch-3-pin-sil.html
>>>
>>> -- CHarles
>>>
>>>
>>> On Friday 17 July 2009 13:30:51 jimmy allen wrote:
>>>> i have ordered a part from brightsparks part code UGN3503U
>>>> which i think is an analog one
>>>> i am planning to use it with a propeller but i can understand some
> basic
>>>> AVR C so that would be fine(comments would be even more useful) but
> just
>>>> long as i can understand it it will be fine
>>>>
>>>> cheers
>>>>
>>>> On 7/17/09, Charles Manning <manningc2 at actrix.gen.nz> wrote:
>>>> > On Thursday 16 July 2009 19:18:27 jimmy allen wrote:
>>>> >> for a project i am thinking about using a HES
>>>> >> i have ordered one (a UGN3503U) and i am not too sure how to program
>>>> >> one. so i was looking for a piece of sample code if anyone has
> worked
>>>> >> with the before.
>>>> >
>>>> > It depends on the sensor you use. South Island component centre has a
>>>> > selection.
>>>> >
>>>> > There are basically three main types:
>>>> > * Analogue: Attach to an ADC pin and make an ADC reading.
>>>> > * Unipolar Switch: Open collector. It looks like a switch to ground
>>>> > that
>>>> > turns
>>>> > on when the magnet is close (polarity sensitive - only reacts to
> North
>>>> > or
>>>> > South, I forget which). Turns off when the magnet goes away. You just
>>>> > hook this up to an input pin with a pull-up (like a touch switch
> etc).
>>>> > *
>>>> > Bipolar switch: Like Unipolar switch, but needs to be actively turned
>>>> > off.
>>>> >
>>>> > Turns on with North and turns off with South (or vice versa, I forget
>>>> > which).
>>>> >
>>>> >
>>>> > If you want code, you'll need to say what micro you're using.
>>>> >
>>>> > -- CHarles
>>>> >
>>>> >
>>>> >
>>>> >
>>>> > _______________________________________________
>>>> > Chchrobotics mailing list Chchrobotics at lists.linuxnut.co.nz
>>>> > http://lists.ourshack.com/mailman/listinfo/chchrobotics
>>>> > web site: http://kiwibots.org
>>>> > When replying, please edit your Subject line to reflect new content.
>>>>
>>>> _______________________________________________
>>>> Chchrobotics mailing list Chchrobotics at lists.linuxnut.co.nz
>>>> http://lists.ourshack.com/mailman/listinfo/chchrobotics
>>>> web site: http://kiwibots.org
>>>> When replying, please edit your Subject line to reflect new content.
>>>
>>>
>>>
>>> _______________________________________________
>>> Chchrobotics mailing list Chchrobotics at lists.linuxnut.co.nz
>>> http://lists.ourshack.com/mailman/listinfo/chchrobotics
>>> web site: http://kiwibots.org
>>> When replying, please edit your Subject line to reflect new content.
>>>
>>
>> _______________________________________________
>> Chchrobotics mailing list Chchrobotics at lists.linuxnut.co.nz
>> http://lists.ourshack.com/mailman/listinfo/chchrobotics
>> web site: http://kiwibots.org
>> When replying, please edit your Subject line to reflect new content.
>
> _______________________________________________
> Chchrobotics mailing list Chchrobotics at lists.linuxnut.co.nz
> http://lists.ourshack.com/mailman/listinfo/chchrobotics
> web site: http://kiwibots.org
> When replying, please edit your Subject line to reflect new content.
>