Всички публикации от Mihail Peltekov

Found where is my 1-wire Problem !

Now i explain why i have problem with my 1-wire barometer.

After few days i found one transformer from any pc device(i don’t from what, but over side write “ 14V 0.8A“ )  and i decide to make this transformer to supply my 1-wire barometer ..

And i put to this divice jack and power my 1-wire barometer and what happed !?

When I run OneWireViewer i found ALL is OK and program no say anythings Errors !!

All with 1-wire converter DS9097E !!!

Then I run Wserver and determinate – All Work very fine and program not say ANYTHING ERRORS !!!

Even Wserver read and DS18S20 !! I don’t believe because creator of this program sayd me .  

quote: I’m not sure about the DS2438 and external power – but I _KNOW_ it will not read a DS1820 temperature sensor if it’s connected through a DS9097E !

This is e-mail is send from ARNE !

That’s ALL

Now i coment that circuit and pcb what i make !!

First thing is that when power supply to 1-wire barometer is supply with 20V and more. The stabilizer begin heat up and the stabilizer MUST be put over aluminium or other cooler ! But effect of that heating is very BAD.

Thermo sensors display not really temperature and not showing accurate temperature !!

And issue is supply barometer with 12-14V and u don’t have a problems with accurate measuring of  temperature !

I will stop now and go to sleep :)

Problems with 1-Wire Barometer !

First i must explain what i make and then what is my problem with my barometer !

  1. First I make barometer circuit from this site http://home.comcast.net/~andrew.g.miller/barometer/ i make pcb in http://www.micron20.com/  when i got my PCB i began solder elements. I complete and that is picture on the right on page>
  2. Complete Barometer PCB Now must make 1-wire converter 1-wire to rs-232 and i use standart „1-wire pas1-wire Passive Adaptersive adapter „





    3. I make 1-Wire passive adapter

1-Wire Passive Adapter maded by me

4.  Now i ready to connect RJ-45 connector from 1-Wire passive adapter to 1-Wire Barometer and make my test ..

5.I connect 1-Wire adapter to 1-wire barometer and run „OneWireViewer“ (this without Power to Barometer )  http://misho.zlatograd.com/blog/wp-content/withoutPower.JPG

6. All is Ok and „OneWireViewer“ don’t says anything errors when 1-Wire Barometer is not Powered,but when put Power

My Power Supply (Output is 13.9V 5A) Perfect filtered

In the Barometer „OneWireViewer“ start showing errors



and i start to wonder what happed here !??!! Where is the PROBLEM !

In my Pc ? In my 1-wire Passive Adapter or may be in 1-wire barometer ? or in my Power Supply ? Where !!! That is the question !?

VR1 = stabilizer 10V and his output voltage is 9.99V

VR1 10V Stabilizer = output 9.99V input 13.9V

VR2= stabilizer 5V and his output voltage is 4.92 !

VR2 5V stabilizer output is 4.92V input is 10V

Power is OK ! All voltages is in norm !

When 1-Wire adapter is connected to 1-Wire barometer output voltage on one wire cable is 5.88 and range is 5.7 to 6V (I don’t know why)

Connect to 1-wire Out ! Output Voltage 1-wire out ! 

And this is my multimeter my-68

My Digital Multimeter My-68


This is barometer when Powered

Barometer when power is ON !

That’s ALL !!! Sorry for bad quality of the pictures, but they maded with SonyEricsson K500i !

Thank’s to all who help ME !

Best Regards Mihail Peltekov




That’s ALL !