- Wed Jun 10, 2015 6:07 am
#20024
Yes, that's true.
Can you get your hands on for instance the xl semi 2576?
Can you get your hands on for instance the xl semi 2576?
- Wed Jun 10, 2015 4:32 pm
#20089
I found some rather small LM2596 buck converter modules I had flying 'round here. I will try to use them.
When I find the time I'll clean up my first post and collect all tips there. Perhaps if someone else adds information for other modules (I only have 01 and 12) this could become a good place for newbies to start with. I think it might help quite a lot of people.
When I find the time I'll clean up my first post and collect all tips there. Perhaps if someone else adds information for other modules (I only have 01 and 12) this could become a good place for newbies to start with. I think it might help quite a lot of people.
- Thu Jun 25, 2015 7:26 am
#21601
Use 5 kohm for pullups, 10kohm is too weak. 10 kohm works ok for the pulldowns. Also a 100 pF cap to ground on the EXT_RSTB pin helps with noise false triggers.
From my experimentation I am able to consistently put the IC in an unknown state causing it to burn up with a 10 kohm pull up on the CHIP_EN pin.
You can refer to the appendix in Espressif's latest hardware users guide.
LastSamurai wrote:Ok here is the next (and hopefully final) version. I added a capacitor to the reset line (is that done right?) and a voltage divider on the adc pin which should break down 3.3V signals to a 01-V range.
Last question remaining for me at the moment: what is the best practice with unused pins in a pcb with the esp? Say I don't need to use the adc and GPIO 14. I guess just leaving them floating isn't the best idea. But what is? Connecting them to ground? With a pulldown?
Thanks again for the help (espacially Georgeloak)!
I hope this might someday help other newbies with esp board development
Use 5 kohm for pullups, 10kohm is too weak. 10 kohm works ok for the pulldowns. Also a 100 pF cap to ground on the EXT_RSTB pin helps with noise false triggers.
From my experimentation I am able to consistently put the IC in an unknown state causing it to burn up with a 10 kohm pull up on the CHIP_EN pin.
You can refer to the appendix in Espressif's latest hardware users guide.
