| Electronics > Projects, Designs, and Technical Stuff |
| 3 Dollar Precision Frequency Standard |
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| paulie:
--- Quote from: Alex Eisenhut on April 20, 2015, 10:12:20 pm ---Did someone say three dollars? --- End quote --- LOL, almost missed this one. I am constantly amused at the expensive and complicated Rube Goldberg setups that some hobbyists and even professionals cook up. Partly a result of sino-phobia which is pandemic in these forums and partly a strange obligation to just throw money around (Lamborghini Syndrome). Sometimes reinventing the wheel makes sense. For example education or entertainment (building is fun) but unfortunately that is not always the case. There's only one thing better than solving a problem with a $3 Ebay trinket and that's solving it with a $1 trinket. :) |
| paulie:
A friend noticed couple entries in the page one table were off so I fixed that and uploaded the program used to generate divisions along with details on use. If there are any questions don't hesitate. |
| paulie:
Exactly one month after last calibration I thought another checkup might be in order. This time only the frequency standard was tested against WWV and was about 2 Hz off. Interestingly 2 under whereas last time it was 1-2 over so this may be indication those Raltron TCXO are pretty good for long term drift. Room temperature is about 10C higher now but I don't know if that has much effect. Other news... on request from a couple local pals I updated the code to run on Mega328 and button pushes are easier. Instead of dividing once per hit it skips directly through the table frequencies on page one. If anybody here wants to build this version let me know and I'll put up files. Wiring diagram is the same as for the Mega8. |
| netdudeuk:
Great thanks. Please will you upload the 328 stuff. I ordered an ATMEGA8 a while ago and am still waiting. I have several 328s. I've also got a couple of these 10MHz Vectons so I'm raring to go. Thanks |
| Flump:
could this be done with an arduino ?as i have a spare uno and i have a 10mhz ocxo would love to have 5mhz and 1mhz at the push of a button |
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