On Mon, Mar 20, 2017 at 4:14 PM, Mark Sims <hol...@hotmail.com> wrote:
> $3 for an Arduino chip on a PCB with proto area from China (should have > bought a lot more when they were available), $10 for a small ovenized 5V > TTL output OCXO (also should have bought a lot more), and $5 for misc > parts (OK, beer money not included in the BOM). Batteries not needed, > powered off USB. Hi Mark, Did you use the Arduino's PWM output plus a LPF for the DAC, or a separate DAC? If PWM, did you have problems with noise or sensitivity to the USB-provided supply voltage? Also I have found that not all computer USB ports can supply enough warm-up current for a 5V OCXO. Or did you use a hefty USB charger and miss out on the ability to get logging info back over the USB port? -- --Jim Harman _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
