3 ms·

1A? Do you have a source for that? It could have an impact for a project I'm working on. Most documentation I've seen seems to state a typical max draw of <250

1A? Do you have a source for that? It could have an impact for a project I'm working on. Most documentation I've seen seems to state a typical max draw of <250mA (for instance, http://bbs.espressif.com/viewtopic.php?t=133 http://bbs.espressif.com/viewtopic.php?t=133) -- I guess there will be some spikes, but I was never aware of anything approaching 1A.

Alupis 10y ago
The 1A figure might be more of a precaution - can't find anything "official" from Espressif (ESP8266 manufacturer), although most people on forums seem to agree 500mA is as low as you want to go. Seems you can expect ~250-300mA to be normal when using wifi. Anecdotally, I've experienced reliability issues when running off 500mA, but that could just be my setup + accessories. It's funny how it works - last time I went down the rabbit hole on the tail end of a late night session, everything pointed at 1A being considered "safe", and anything lower was "iffy". If you put the chip into any of the Deep Sleep modes, power consumption goes way down to just a few mA's, making battery operation much easier. http://www.esp8266.com/viewtopic.php?p=57788#p57788 http://www.esp8266.com/viewtopic.php?p=57788#p57788
StavrosK 10y ago
I use a PSU with an ammeter and it shows around 250mA in everyday use.
michaelt 10y ago
Here's a graph of current consumption of an esp8266, which I measured with a 2 ohm resistor between my power supply and an rt9013 regulator https://imgur.com/a/c30mL https://imgur.com/a/c30mL (At one point I de-soldered the status LEDs from the module - I can't remember if this was before or after that) There are several spikes approaching 500mA - and you might see even higher current consumption if you're further from your wifi AP, or if you have extra components, a different voltage regulator, or different capacitors. Many beginners only have a basic multimeter (if that) so they might have a hard time diagnosing problems caused by spikes in current consumption. So I think it's good for beginners to get at least a 500mA power supply, even though the average on state current consumption only hovers around 70mA.

Alupis 10y ago

The 1A figure might be more of a precaution - can't find anything "official" from Espressif (ESP8266 manufacturer), although most people on forums seem to agree 500mA is as low as you want to go. Seems you can expect ~250-300mA to be normal when using wifi. Anecdotally, I've experienced reliability issues when running off 500mA, but that could just be my setup + accessories. It's funny how it works - last time I went down the rabbit hole on the tail end of a late night session, everything pointed at 1A being considered "safe", and anything lower was "iffy". If you put the chip into any of the Deep Sleep modes, power consumption goes way down to just a few mA's, making battery operation much easier. http://www.esp8266.com/viewtopic.php?p=57788#p57788 http://www.esp8266.com/viewtopic.php?p=57788#p57788

StavrosK 10y ago

I use a PSU with an ammeter and it shows around 250mA in everyday use.

michaelt 10y ago

Here's a graph of current consumption of an esp8266, which I measured with a 2 ohm resistor between my power supply and an rt9013 regulator https://imgur.com/a/c30mL https://imgur.com/a/c30mL (At one point I de-soldered the status LEDs from the module - I can't remember if this was before or after that) There are several spikes approaching 500mA - and you might see even higher current consumption if you're further from your wifi AP, or if you have extra components, a different voltage regulator, or different capacitors. Many beginners only have a basic multimeter (if that) so they might have a hard time diagnosing problems caused by spikes in current consumption. So I think it's good for beginners to get at least a 500mA power supply, even though the average on state current consumption only hovers around 70mA.