Re: Amazon Dash product ordering button
Posted:
Mon Apr 06, 2015 4:29 pmby jonsmirl
So what is a dirt cheap DC-DC converter that can support both the push button power-on and the soft power-off?
Can it work with a CR2032 or similar to get the needed startup current?
Any idea what is causing those startup current spikes? Maybe I can get Espressif to look at them.
Re: Amazon Dash product ordering button
Posted:
Mon Apr 06, 2015 6:23 pmby jonsmirl
Can you get the current consumption during boot on a scope trace or something? I will send it to Espressif and see what they say. 300mA spikes are very high.
Re: Amazon Dash product ordering button
Posted:
Mon Apr 06, 2015 7:49 pmby anakod
Nice idea
Sprite_tm please, share you circuit. Question: Why you need ESP-12? I think 01 is enough for single button
Re: Amazon Dash product ordering button
Posted:
Tue Apr 07, 2015 2:41 amby Sprite_tm
I think Espressif said it's because the ESP recalibrates the RF bit each startup. You can tell it to only do that every Nth startup, but I doubt entirely disabling it is gonna work, so you still need to design for those spikes.
For a better boost converter: A quick search turned up eg. the LT1308, which may be able to do this.
I'll share the circuit once I finish writing up the article about it. I'll have a pretty busy week this week, so it's probably going to be the next week.