4 ms·

eevblog had a good video about this product: https://www.youtube.com/watch?v=uzV_uzSTCTM https://www.youtube.com/watch?v=uzV_uzSTCTM

tdeck 6y ago
TL;DR it's a 100 microwatt power source which is essentially nothing for most applications.
- jansan 6y ago
  It may be comparable to tritium markers that glow continuously for 10 years without recharging. Their glow is really weak, so you cannot use it as a light bulb replacement, but there are useful applications like markers for emergency equipment or watches.
- shrubble 6y ago
  https://lastminuteengineers.com/esp32-sleep-modes-power-consumption/ https://lastminuteengineers.com/esp32-sleep-modes-power-cons... Would it be enough to power an ESP32 every so often? Put in deep sleep mode, power source charges small battery, wake up, do something, sleep again, etc.
  - ranma42 6y ago
    "in deep sleep mode, ESP32’s current consumption is almost 150 uA" Assuming a 3V power supply is needed, at 100uW, you only get ~30uA, so no. However the "Hibernation" mode would work (however, this looses memory state): "This Power mode of ESP32 consumes a minimum amount of current, which is around 5 uA." But you'd not be able to wake up very often since the active mode power draw is very high (and even higher yet when connected to wifi). You'd be much better off using a proper low-power microcontroller.
- hinkley 6y ago
  There was talk years ago about scavenged power to run physically embedded sensors intermittently. For instance, absorbing vibrations in the superstructure of a building to run strain gauge or moisture sensor a couple times a day, per location.
  - oh_sigh 6y ago
    At that rate you could put a small battery in it which would last years before needing servicing.
- pantalaimon 6y ago
  The Ambiq Apollo3 uses 6µA/MHz at 3.3V (so 20µW/MHz), so that's something. You can also use it to charge a capacitor that can provide short bursts of energy so you can use it for sensors that sleep most of the time, taken a measurement and send some data, then sleep again.
  - deleted 6y ago
    [deleted]
- p1mrx 6y ago
  It's not even that; it's a digital rendering of a 100 microwatt power source.

tdeck 6y ago

TL;DR it's a 100 microwatt power source which is essentially nothing for most applications.

jansan 6y ago
It may be comparable to tritium markers that glow continuously for 10 years without recharging. Their glow is really weak, so you cannot use it as a light bulb replacement, but there are useful applications like markers for emergency equipment or watches.
shrubble 6y ago
https://lastminuteengineers.com/esp32-sleep-modes-power-consumption/ https://lastminuteengineers.com/esp32-sleep-modes-power-cons... Would it be enough to power an ESP32 every so often? Put in deep sleep mode, power source charges small battery, wake up, do something, sleep again, etc.
- ranma42 6y ago
  "in deep sleep mode, ESP32’s current consumption is almost 150 uA" Assuming a 3V power supply is needed, at 100uW, you only get ~30uA, so no. However the "Hibernation" mode would work (however, this looses memory state): "This Power mode of ESP32 consumes a minimum amount of current, which is around 5 uA." But you'd not be able to wake up very often since the active mode power draw is very high (and even higher yet when connected to wifi). You'd be much better off using a proper low-power microcontroller.
hinkley 6y ago
There was talk years ago about scavenged power to run physically embedded sensors intermittently. For instance, absorbing vibrations in the superstructure of a building to run strain gauge or moisture sensor a couple times a day, per location.
- oh_sigh 6y ago
  At that rate you could put a small battery in it which would last years before needing servicing.
pantalaimon 6y ago
The Ambiq Apollo3 uses 6µA/MHz at 3.3V (so 20µW/MHz), so that's something. You can also use it to charge a capacitor that can provide short bursts of energy so you can use it for sensors that sleep most of the time, taken a measurement and send some data, then sleep again.
- deleted 6y ago
  [deleted]
p1mrx 6y ago
It's not even that; it's a digital rendering of a 100 microwatt power source.