ESP8266 Community Forum

- Fri Jun 05, 2015 11:21 am #19569 Yes ! Never short pins to GND or VCC, always use pullup/pulldown resistors.

- Fri Jun 05, 2015 12:13 pm #19576

Your connection between CH_PD and GPIO15 thru C1 looks a bit strange since CH_PD needs to be pulled-up and GPIO15 needs to be pulled-down for normal operation.

Oh, I think I have to redo the plan, its kinda hard to see where lines are actually connected and where they just cross in this picture. But yeah, I guess I have to add 10k pulldowns between CH_PD and 3.3V and GPIO15 and GND. The condensator should just connect VCC and GND.
Thanks! I will add a new version later today or tomorrow.

- Fri Jun 05, 2015 12:32 pm #19580 C1 in your diagram shows 100nF but that should be 100uF. If you place your regulator close to the ESP module you should be able to just use the 100uF on it's ouput but it won't hurt to have 2 100uF caps if you have them.

- Fri Jun 05, 2015 3:21 pm #19602 Here is my new version. I tried to incorporate all your advice. Did I miss something else?
Still not sure what to do with the adc pin if I don't need to use it.

C1 in your diagram shows 100nF but that should be 100uF. If you place your regulator close to the ESP module you should be able to just use the 100uF on it's ouput but it won't hurt to have 2 100uF caps if you have them.

Are you sure? Other ICs I worked with (mainly atmega ones) need 100nF near the VCC/GND pins and bigger caps only on the main power lines.

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