[time-nuts] Lightning Strike Site, Latency of AS3935 IRQ output

2013-09-16 Thread Tom Bales
Alan, Well, you shamed me into actually setting it up and measuring the IRQ delay. Amazingly, the delay varies from 25 to 110 milliseconds, depending upon what type of triggering is involved. I did the test using their lightning simulator and measuring the delay between the magnetic pulse the

Re: [time-nuts] Lightning Strike Site, Latency of AS3935 IRQ output

2013-09-16 Thread Alan Melia
Bales t...@starhouse.org To: time-nuts time-nuts@febo.com Sent: Monday, September 16, 2013 6:21 PM Subject: [time-nuts] Lightning Strike Site, Latency of AS3935 IRQ output Alan, Well, you shamed me into actually setting it up and measuring the IRQ delay. Amazingly, the delay varies from 25

[time-nuts] Lightning Strike Site, Latency of AS3935 IRQ output

2013-09-16 Thread Mark Sims
The AS3935 chip has a DSP on it that is doing a lot of statistical analysis. It only draws a few microamps, so it's gotta be slow. I'd be VERY surprised if the detection to output timing was even slightly deterministic.

Re: [time-nuts] Lightning Strike Site, Latency of AS3935 IRQ output

2013-09-16 Thread Daniel Mendes
It could be... It' s not hard to add nop's so that the detection always takes the slowest possible time (but deterministic, or near). Em 16/09/2013 20:36, Mark Sims hol...@hotmail.com escreveu: The AS3935 chip has a DSP on it that is doing a lot of statistical analysis. It only draws a few