Batteries

[Sascha]

I have used this one:

50W METALL 12 - Drahtwiderstand, axial, 50 W, 12 Ohm, 1%

VISHAY Drahtwiderstände im Aluminiumgehäuse Serie: RH050 hermetisch dichte Ausführung im Aluminiumgehäuse Kühlkörper mit hoher Wärmeleitfähigkeit geeignet für Chassismontage um Kühleffekt zu [...]

www.reichelt.de

 

[LaurentS]

Thanks Sascha, I know now what sort of Resistor I have to order, thanks !
Thisone, is ok if your loop has 0 Ohm, I don't think so... ?
If you adjust your DC/DC converter to 12V then R loop+R added=12 Ohm to obtain our 1A.
Have you measured how many Ohm has your loop ?

 

[Sascha]

If I measure the cables directly I have 4 ohms (circa 200 Meter Cable), if I measure the contacts I only have 1 ohm. But I haven't checked this yet because it's always raining and snowing here.

 

[LaurentS]

Perfekt, if you have 4 Ohms on your loop, then you should put an 8 Ohm Resistor.
This should bring you a stronger loop signal.

8 Ohm Resistor

 

[Bernard]

Maybe 12 Volt is big value.
I use
9V and 1010 mA on a near 300 ml loop
and
9V and 380 mA on a near 100 ml loop

Signal is OK everywhere at 15 ml of the wire and max mag is near 4500

 

[LaurentS]

Bernard, I red that we have to use U=RI to find the right value for the added Resistor, to bring courant to 1A .
So, you think 9V should be enough, it means for Sascha to adjust the DC/DC output on 9V and determine the Resistor on this basis.
=> R loop + R added = 9/1
=> 4 + R added = 9
=> R added = 5 Ohm should be ok in this case ?
If he decide to keep the 12 Ohm Resistor, on 9V , the courant will be 0.56A, for now on 12V => 0.75A.

 

[Bernard]

the courant will be 0.56A, for now on 12V => 0.75A.

True., but 12 V and 1 A are the max value.
It's OK for the 2 solutions.
Simply test first at 9V and if signal is not OK adjust it up to 12V

 

[LaurentS]

Perfekt, thanks Bernard, it means it should work for Sascha, and I will first start with 9V on something like 0.5-0.6A.
Sascha could adjust the dc/dc output on 9V.

 

[Sascha]

Yes i have the Output from the DC/DC set to 9V

 

[LaurentS]

Many problems with my 3D printer and PETG... I had to restart 3 times the print, and lost to much time... .

Well for now, my charging equipment seems to be ok, but I have to finish the mower to test it... . Third time my 3D printer stopped on printing the sender cover ... keep cool... .
Does the esp32 also working with the pfodApp ?

 

[Bernard]

Third time my 3D printer stopped on printing the cover

Before print check if the screen size is OK for the cover,I receive some screen that don't fit well without change.
The esp32 sender don't use Pfod.
From your browser 192.168.0.31/? or /A1 or/A0 to use it.

 

[LaurentS]

Well, one more time, my printer stopped... no cover for now.

With those three address, it works;
192.168.0.31/?
informations MAC ADRESS = _:_:_:_:_:_ WORKING DURATION= 80 PERI CURRENT Milli Amps= 0.00 sigDuration= 104 sigCodeInUse= 1 sender A : 1 sender B : 0

/A0:
SENDER A IS OFF
/?
WORKING DURATION= 0 PERI CURRENT Milli Amps= 0.00 sigDuration= 104 sigCodeInUse= 1 sender A : 0 sender B : 0

/A1
SENDER A IS ON
/?
WORKING DURATION= 1 PERI CURRENT Milli Amps= 0.00 sigDuration= 104 sigCodeInUse= 1 sender A : 1 sender B : 0

Now a lot to do on the mower.
Thanks for your time spent on this big project.

 

[LaurentS]

The Sender is ok. One week just to build thisone.
I had to change many things on 3Dprints to be ok with my expected configuration.