Search results

  1. CommanderLake

    AOCJY2 10 MHz OCXO time source

    Now it drifted forward by 6ms in 17 hours so all I have to do is tweak the trim pot on the voltage control pin then wait an increasingly long period of time.
  2. CommanderLake

    AOCJY2 10 MHz OCXO time source

    As it turns out the serial send is instant and only the read is affected by the latency timer which must be polling the serial adapter for incoming data so after comparing my new time source to the HPET in my PC where I get the HPET time immediately before sending the serial request shows a...
  3. CommanderLake

    AOCJY2 10 MHz OCXO time source

    Actually I didn't have the control voltage pin connected to anything so I've hooked that up to a 1K trim pot VCC to GND and calibrated it to 1.65v which is half the 3.3v supply right in the center of the adjustment range which is +-700PPB.
  4. CommanderLake

    AOCJY2 10 MHz OCXO time source

    So I got the counters I mentioned above in the alternate configuration where package 1 counter A overflows to package 2 counter A overflows to package 3 counter A then B. I'm using a Picaxe 40X2 μC with an external 16MHz oscillator to run it at 64MHz because its incredibly easy to code for and...
  5. CommanderLake

    AOCJY2 10 MHz OCXO time source

    The SN74LV8154 can be used as a 32bit counter but even dividing the 10MHz clock by 10000 barely gets to 50 days and I don't see any way of rolling one over to another because it only has a rollover pin for the A counter not the B. Alternatively I could connect the 10MHz clock directly to the...
  6. CommanderLake

    AOCJY2 10 MHz OCXO time source

    A 64 bit counter would be nice but I cant find any, maybe I just don't know what to search? All I'd need is 64 flip-flops and something to read the output pins in theory. The obvious reference would be an internet time service, there's nothing more accurate than the atomic clocks they use.
  7. CommanderLake

    AOCJY2 10 MHz OCXO time source

    I mean if I were to divide 10MHz with 4 decade counters then count the 1KHz pulses even a 16 bit counter would only get to 65.535 seconds so what kind of counter do I need to keep track of time for a long time?
  8. CommanderLake

    AOCJY2 10 MHz OCXO time source

    Not sure where to put this so I'll put it here... So I got me a 5 ppb AOCJY2 10 MHz OCXO purely out of scientific curiosity and so far I have established that my Picoscope oscilloscope is 15.4μs/s slow :D so now I want to try using it to keep track of time to see how accurate it is in the long...
  9. CommanderLake

    Designing LED photography strobe power supply

    I'm not a novice I was looking for suggestions for a DC-DC converter but I found better help from TI.
  10. CommanderLake

    Designing LED photography strobe power supply

    Maybe this isn't the bast place to ask this, we don't seem to be on the same level.
  11. CommanderLake

    Designing LED photography strobe power supply

    I've played with a couple of Cree CMA3090 LED's for things like a light that lights up the clouds and a high speed strobe and even using one as a flash connected to a DSLR hot shoe, but one is slightly too weak for that task so I want to try using 4 of them to make a strobe I can use connected...
  12. CommanderLake

    Photon detectors

    Could it be something to do with quantum entanglement after the photon goes through the beam splitter?
  13. CommanderLake

    Photon detectors

    I didn't realise how common avalanche conduction is, I have an old plasma globe that I've experimented with by taking the globe off and touching the bare wire coming out of the flyback transformer with a screwdriver. Just out of interest I had a look at the electric field by putting an...
  14. CommanderLake

    Photon detectors

    I was hoping you might post Howard, my aspergers may affect communication but I have a vast imagination that allows me to visualise things like few people can. Avalanche diodes are intriguing but they dont quite excite me the way a photon excites them knowing how much money I could so easily...
  15. CommanderLake

    Simple example of double sided PCB design

    Try Diptrace, the freeware version can do double layer and up to 300 pins (middle one): https://diptrace.com/download/download-diptrace/ I will then answer any question you have because I use Diptrace all the time.
  16. CommanderLake

    Photon detectors

    I discovered that, maybe I overlooked it because I had no idea avalanche photodiodes exist. Why is it so expensive?
  17. CommanderLake

    Photon detectors

    I was looking for something on Digikey and I came across this, I knew photon detectors exist but I never looked into how they work, It seems to use a plain old photodiode. I have some 5ns photodiodes and some experimenting showed that its impossible to have the best possible speed and...
  18. CommanderLake

    Simple example of double sided PCB design

    Its quite simple, if something is too difficult to route on one side, use the other side via a via or through hole component. Don't forget you can put components on the bottom side such as surface mount ceramic capacitors for an IC using vias.
  19. CommanderLake

    Crystal oscillator 15pF load

    Page 3, parameter Load: 15pF nominal. How is it possible for one to validate such a small load?
  20. CommanderLake

    Crystal oscillator 15pF load

    I have a Connor-Winfield OH4610LF-024.576M Its not a question relating to any particular application, the datasheet says 15pF nominal load so hypothetically how does one verify such a small load if a scope probe tip is 15pF?
Top