On 28/02/2020 10:19, Richard Owlett wrote:
> On 02/27/2020 12:23 PM, Dave Liquorice wrote:
>> On Thu, 27 Feb 2020 09:08:45 -0400, Gregg Somes wrote:
>>
>>> Hi, I am trying to use a  2 lead thermistror (not a temp/humidity
>>> sensor) with RPi 3B+.  Is it possible to wire this without a breadboad?
>>
>> Pi's don't have any analog to digital convertors. The simplest
>> solution is most likely to be a 1-Wire temperature sensor:
>>
>> https://datasheets.maximintegrated.com/en/ds/DS18B20.pdf
>>
>> Plenty of code out there to work with them (and many of the other
>> 1-Wire devices).
>>
>
> One wire?
> BULL! I quote the referenced pdf "... one data line (and ground)".
> And as a PRACTICAL point you need another wire to power the device.
> That makes it a *THREE* wire device.
>
>
Yebbut there is only one DATA wire. :-)

You are probably not old enough/in te wrong country to have listened to
the exploits of Larry the Lamb and Dennis the Dachsund in Toytown, on
the radio.

There was a character called IIRC the Inventor who complained 'the
trouble with this  wireless is that it involves such a lot of WIRE!!!"

https://www.bbc.com/historyofthebbc/anniversaries/july/toytown-first-transmitte
d



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