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An update: It´s not quite working: When I start it, I get the "GPSDO YT 1.1" message, then "No config, setting PWM to 50%...", then the "Warming..." message, the "Push button to skip", then "Waiting...". And no matter how much I press the button after that, it stays in the "Waiting..." phase, and it never updates the PWM.Pressing the button to clear the memory does work.I haven´t tried disconnecting the LCD again, but it was calibrating fine before I put it in.I think "10,000,000.000Hz" is fine but I haven´t been able to see that message yet!
Extra update: After removing the LCD, it starts adjusting the PWM again.
Hi, Yannick! I fixed it, but it´s not exactly what you say: You left pin 5 unconnected in your diagram, instead it has to be grounded. I saw this in the photo of your protoboard above!
Hi, Yannick, it doesn´t seem to be working. The LCD display just shows a line of blocks and the PWM stays stuck on 0.5. I´ve checked and rechecked every connection and everything seems to work, but unfortunately I can´t debug it.The problem happens with both versions, not just the new one.
Hi, Yannick, would it be possible for you to release the code for the program? I'd like to alter it to work on a 2x16 LCD Display.
Hi Yannick, Finally worked, the software was loaded again by another method, it is working VERY WELL !!
Hello Yannick, we reloaded the uC, this time using another method and now it works correctly!!.Thank you very much
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GPSDO YT, disciplined oscillator 10Mhz reference frequency. Low cost. Accurate.
Hello Yannick, I did the following, I replaced the OCXO with an HP8656B signal generator, injected rf into pin 9 of the uC and connected the oscilloscope to pin 15 of the uC, by varying the frequency in more and in less than 10mhz, the pulse train In pin 15 varies the frequency but does not vary the duty cycle, the voltage VCO is always 4,66v. 1pps from GPS is ok on uC pin 4.Thank you very much
Hi Yannick, I did another verification, I do not have the 4x20 display (I only have one of 2x20) but with the oscilloscope you do not see any activity on the pins 23,24,25,26,27,28, there are only 5v on pin 28 , The others are at zero v
Hi Yannick, thanks for the reply, I say: I do not know how the uC was loaded, I did not do it, I do not know how to do it, I have no experience with uC, I just know it was placed on an Arduino UNO board and there it was loaded.Should the uC be placed on the GPSDO board with the 10MHz OCXO clock during programming?For programming is it necessary that the pulse of 1pps of the GPS is present?I apologize for the inconvenience.Thank you very much
Hello Yannick, this does not work, when the gpsdo on the VCO is 2,467v, 10 hours later VCO = 2,467v, I think the software was not loaded correctly, it was not loaded by ISP, my experience with microcontrollers is zero, if you do not Can you help me the project will be unfinishedThank you very much
Hello dr om, I am doing the gpsdo with atmega 328, I do not know if it is working correctly, at pin 15 of the atmega there is a square wave of 152,4Hz 49,39% duty cycle, is it right ?, the oscillator is a Morion MV89, 12v sine.I await an answerThank you very muchThank you very much