IK8OZV Enzo look here:
The VCC of the display to the VCC of the Minitiouner Pro2 Connector JP3
The DATA of the display to the SDA of the Minitiouner Pro2 Connector JP3
The TC/CLK of the display to the SCL of the Minitiouner Pro2 Connector JP3 that PIN I mean
The GND of the display to the GND of the Minitiouner Pro2 Connector JP3
Display MoreIK8OZV Enzo look here:
The VCC of the display to the VCC of the Minitiouner Pro2 Connector JP3
The DATA of the display to the SDA of the Minitiouner Pro2 Connector JP3
The TC/CLK of the display to the SCL of the Minitiouner Pro2 Connector JP3 that PIN I mean
The GND of the display to the GND of the Minitiouner Pro2 Connector JP3
OK Heiner,
I think i have done a bit of confusion. Sorry.
This morning i made again the test and have noticed that the right connection
which give me the issue is not:
The TC/CLK of the display to the SCL of the Minitiouner Pro2 Connector JP3
but:
The DATA of the display to the SDA of the Minitiouner Pro2 Connector JP3
Now your thought is always the same?
Should i have to make the test always how you said with the diode?
Please accept my apologies for my confusion
73's de Enzo IK8OZV
my proposal is the same. but now do it for the SDA pin.
but you cannot use the diode, because SDA send an acnowlegde back,
IK8OZV Enzo do the following please:
1. disconnect display and power from minitiouner. Collect the OHM values on JP3 between SDA to GND and Vcc. The same please do with SCL to GND amd VCC.
2. Do the same with the display as writen above.
then we can continue.
You can also look on the SCL and SDA lines while the display is connected and the minitiouner is under power with an ozilloscope.
I expect you see a difference.
Also you can read the values of the two resistors on the board which are right of JP3. theire values should be the same.
Display MoreIK8OZV Enzo do the following please:
1. disconnect display and power from minitiouner. Collect the OHM values on JP3 between SDA to GND and Vcc. The same please do with SCL to GND amd VCC.
2. Do the same with the display as writen above.
then we can continue.
You can also look on the SCL and SDA lines while the display is connected and the minitiouner is under power with an ozilloscope.
I expect you see a difference.
Also you can read the values of the two resistors on the board which are right of JP3. theire values should be the same.
Heiner this is what i have done:
Disconnected all the connections from the Minitiouner ( Power Supply, Antenna and USB ).
Put the minitiouner ont the table and opened it
Disconnect all the connections from the minitiouner to the display.
Measured with a digital Multimeter set on Ohm 20K full scale between:
PIN SDA and PIN GND of JP3 on the minitiouner Board and get= 5.74
PIN SDA and PIN VCC of JP3 on the minitiouner Board and get= 3.38
PIN DATA and PIN GND of the Display Board= 168.4 ( but i had to put the multimeter 200K full scale )
PIN DATA and PIN VCC of the Display Board= 1.643 ( but i had to put the multimeter 2M full scale )
I hope is what you request and have done correctly
Danke
73's de Enzo
IK8OZV Enzo, I will do the same measurements tomorrow on my board and keep you updated.
OK Heiner
Danke
73's de Enzo IK8OZV
IK8OZV Enzo I just checked my two boards and two displays.
On the displays SDA and SCL to GND or VCC minimum around 500KOhm so no pull up resistor on the display board.
JP3 on my boards:
Between GND and SDA or SCL nothing to measure.
Between VCC and SDA I see the 3.38 KOhm
Between VCC and SCL I see the 5.74 KOhm
My conclusion is your board should be ok and it looks the fault is on the display board.
Display MoreIK8OZV Enzo I just checked my two boards and two displays.
On the displays SDA and SCL to GND or VCC minimum around 500KOhm so no pull up resistor on the display board.
JP3 on my boards:
Between GND and SDA or SCL nothing to measure.
Between VCC and SDA I see the 3.38 KOhm
Between VCC and SCL I see the 5.74 KOhm
My conclusion is your board should be ok and it looks the fault is on the display board.
Nooooooooooo so i need to buy another Display again.
If i want to try to send an email to them ro say the Display is faulty and see if they can substitute it,
what can i say? Can we tell them which is the fault or not?
Thanks
73's de Enzo IK8OZV
... Can we tell them which is the fault or not?....
Not sure that the display is faulty.
Wolfgang, DC2TH, told me, he had similar problems.
mayby a problem from the Minitiouner
We have to check more ....
no,
I wrote yesterday Wolfang a email, but he did not answer yet ....
Maybe vacation .... we have to wait.
73´s de Robert
Display Moreno,
I wrote yesterday Wolfang a email, but he did not answer yet ....
Maybe vacation .... we have to wait.
73´s de Robert
Thanks Robert for your help
73's de Enzo IK8OZV
I don't know this specific problem,
but I2C problems when connecting external components (like displays) happen frequently.
What I would try is to solder 3,3kOhm resistors between Vcc and SDA, and also Vcc and SCL, directly to the connector on the display.
This makes the I2C lines a little faster, maybe it helps.
vy 73, Kurt
