4 ms·
running RF for wifi or BT or something may boost the budget a bit. Fixed point sampling capture would mean clock coordination which drifts. Sending a wake call
by ggm 1y ago
running RF for wifi or BT or something may boost the budget a bit. Fixed point sampling capture would mean clock coordination which drifts. Sending a wake call to come out of low power states is what the old "Morse code" audible pulses of interference on radio in the GSM days were doing: making the higher cost digital signalling stack wake up.
I think zigbee does stuff in this space. 6lowpan too.
Put a wifi or bt shield on, battery will drop faster.
If the led can blink a code, you could remote read it off a phone or something. Newton's did IR networking. The conference translation headsets use it too: the radiators for the signal get appreciably hot.
- userbinator 1y agoSending a wake call to come out of low power states is what the old "Morse code" audible pulses of interference on radio in the GSM days were doing No, that's the phone itself transmitting in its TDMA timeslots. https://en.wikipedia.org/wiki/Time-division_multiple_access#2G_systems https://en.wikipedia.org/wiki/Time-division_multiple_access#...
- ggm 1y agoSo I got the directionality wrong, but it did seem to presage a call event: you heard the distinctive tones before the ring. Would you agree it's part of the re-initialisation sequence, even if not directly caused by the transmission infra talking to the phone?
- KaiserPro 1y ago> Sending a wake call to come out of low power states is what the old "Morse code" audible pulses of interference on radio in the GSM days were doing kinda, but in this instance the radio in receive mode is quite expensive, something like 1-20ma. To get years long battery power you need micro amps.