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HF_ATL

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About HF_ATL

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    RC-Cam'er

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  1. Seems that it is working good! I've tested two 1.3GHz VTx and the result seems in line with what other people also get! Min / Max Power measurements are also spot on! Many thanks for this low-cost RF power device Mr. Thomas! http://sendvid.com/pllsjhjy
  2. Very quick and professional way to address that this issue can happen again. Can't get better than this! Very proud of your awesome work Mr. Thomas!
  3. I have purchased this item in ebay about 1 year ago. All I can see it says is: "LCD Keypad Shield, Drive the Future". The best would be for users to check what you said to me: "Ideally the A0 voltage with no button pressed will be 2.45V - 2.50V. With the Select button pressed you should see about 2.0V". I guess this is a good starting point to check for possible keypad issues. I still need a directional coupler (not yet purchased) as I'm always looking for a good used one for a good price. Calibration probably will be left as it is unfortunately as I don't have access to any equipment for verify the results.
  4. It works as expected! Many thanks for all your support, really appreciated! I have already configured successfully the attn profile for my 30.3db attenuator. I get around -67dbm/-68dbm with nothing connected to the SMA input. Unfortunately I don't have here at the moment a 1.3GHz transmitter to test but I'll come back here and post my results for sure. Wonderful work Mr. Thomas and Mr. Joost!
  5. I guess now the values are acceptable enough? Thanks you!
  6. I measured: A0 voltage when no buttons are pressed: 2.47V A0 voltage when select button is pressed: 2.05V Measurements done with the 1.99KOhm resistor.
  7. With a 1.99 KOhm connected between A0 and gnd pin I measured: Select button pressed: 846 Left button pressed: 677 Right button pressed: 10 Up button pressed: 251 Down button pressed: 509 None button pressed: 1020 With the 1.99 KOhm resistor installed I now get 1.10 Kohm between A0 and gnd pin.
  8. I measured: A0 voltage when no buttons are pressed: 2.11V A0 voltage when select button is pressed: 1.80V Measurements done with the 1.48KOhm resistor.
  9. With a 1.48 KOhm connected between A0 and gnd pin I measured: Select button pressed: 744 Left button pressed: 611 Right button pressed: 10 Up button pressed: 241 Down button pressed: 470 None button pressed: 871 With the 1.48 KOhm resistor installed I now get 0.93 Kohm between A0 and gnd pin.
  10. With a 2.2 kOhm connected between A0 and gnd pin I measured: Select button pressed: 884 Left button pressed: 697 Right button pressed: 10 Up button pressed: 252 Down button pressed: 520 None button pressed: 1023 With the 2.2 KOhm resistor installed I now get 1.16Kohm between A0 and gnd pin.
  11. Thanks for your support Mr. RC-CAM! With a 2.7kOhm connected between A0 and gnd pin I measured: Select button pressed: 940 Left button pressed: 736 Right button pressed: 10 Up button pressed: 258 Down button pressed: 542 None button pressed: 1023 With the 2.7 KOhm resistor installed I now get 1.29Kohm between A0 and gnd pin.
  12. I confirm that the resistor placed between A0 and gnd pin is correct. I have just measured 3.29kOhm with my multimeter (one terminal of the resistor disconnected to properly measure the resistor value). With the resistor connected I measured 1.41kOhm between A0 and gnd.
  13. I confirm that I have a 3.3KOhm resistor between A0 pin and ground. It is the same as the picture above. I attach a photo taken now from mine.
  14. Dear Mr. Joost and Mr. RC-Cam, Many thanks for the quick reply and support! Voltage on A1 pin is 2.1V when no signal is connected. That problem is solved... Both of you nailed it exactly! Apparently it was due to a power supply issue. I just used another 12V source with bigger amp capacity (1A) and now that error message has gone. The LCD backlight must be consuming a lot. The voltage drop is around 0.8V from the supply voltage unconnected to VIN pin. However another issue occurred: The select button on the keypad doesn't work. I used the serial port to get the analogread of the A0 to view the values as I pressed all the keys. I noticed that the values used on the code don't suit my situation. I used this line of code: "Serial.println(adc_key_in);" to get those values on Serial monitor. Even changing the values for the new ones the select button doesn't work. The values I get are: Select button pressed: 1012 Left button pressed: 774 Right button pressed: 10 Up button pressed: 263 Down button pressed: 561 None button pressed: 1023 Best regards, JF
  15. I've done all the steps mentioned but I got this error message: OVERLOAD WARNING, Disconnect now! and Hardware problem, RF sensor: FAILS I'm using AD8318 and v2.2 I've not yet tried to connect it to any transmitter. Any tips? Thank you
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