The DS2423 is discontinued and hard to find these days.
I built this, which is a DS2423 implemented on an ATtiny:
https://www.tm3d.de/index.php/1-wire-device-mit-avr
It works, but the address is hard-coded. There is a utility to generate
new addresses if you will have more than one in your network.
I also changed the fuse settings to lower the brownout detection voltage as
I was running it at 3.3V, not 5V.
I used it on a Raspberry Pi 3. It didn't work with the native w1_ds2423
module, but it did work with OWFS using the w1 driver.
HTH,
Andrew
On 19 October 2016 at 10:36, Peter Hollenbeck <pwhb...@gmail.com> wrote:
> Thanks. I'll work on it.
>
> On Tue, Oct 18, 2016 at 3:59 PM, Jan Kandziora <j...@gmx.de> wrote:
>
>> Am 19.10.2016 um 00:33 schrieb Peter Hollenbeck:
>> > I would like to count revolutions of an anemometer, perhaps this one:
>> > http://www.inspeed.com/anemometers/vortex_wind_sensor.asp
>> >
>> > I would appreciate suggestion on how to implement a counter.
>> >
>> You could use the DS2423, or some of the homebrewn DS2423 replacements
>> out there. As it has a reed switch, you need some debouncing on the input:
>>
>> ^ +5V
>> |
>> 10kΩ
>> |
>> .-----+-------> DS2423 input
>> | |
>> o |
>> \ 100nF
>> \ |
>> o |
>> | |
>> === === GND
>>
>> These values give you ~1ms, which should be enough to debounce the
>> switch and which is fast enough for 500Hz (== 1250mph for this
>> anemometer.)
>>
>> Kind regards
>>
>> Jan
>>
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>
>
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