ESP8266 Community Forum

- Wed Jun 03, 2015 5:39 pm #19389 I'm kind of an old-timer. I cut my tech teeth on ham radio tube circuits back in the early 1960's.
Back when working on projects could kill you - LOL!
My dumb question is this "is a 100nf cap what we used to call a .001uf cap?"
In other words, does the "nf" put the value "backwards" to the right of the decimal place? 100 -> .001?

- Wed Jun 03, 2015 6:36 pm #19391 No, 100nF = 0.1uF but usually the bypass caps are designed into the circuit on the board so as a user you should only add the reservoir cap which helps reduce sag on the Vcc line.

Don't worry, I'm not that far in age behind you!

- Wed Jun 03, 2015 7:44 pm #19397 Thanks!

- Thu Jun 04, 2015 12:13 pm #19448 It is still unclear to me whether the reset and chip power down pins have internal pullup and pulldown resistors respectively? Things seem to work fine tying CH_PD directly to Vcc and leaving the reset pin floating.

Also, what is the deal with GPIO-15, it has to be pulled down on startup but can then be used as a GPIO? Can I also assume that this pull-down can be done with a direct connection to ground?