ESP32 Forum

Posted: **Tue Jan 03, 2023 4:59 am**

Hello,
I am working on the Project in which I am using ESP32 WROOM 32E and this Project will be Battery Operated.I want to implement external RTC crystal feature.

As shown in attached image,
R4 resistor value in the range of 5M ohm to 10M ohm. So how to choose proper value, can suggest specific value of this resistor.

: rtc_crystal.png (113.92 KiB) Viewed 1407 times

Thank You

Posted: **Tue Jan 03, 2023 6:17 am**

You could mount 10M as initial value, if it does not work, you could decrease the value until crystal works.

Posted: **Thu Jan 05, 2023 4:57 am**

ESP_LJH wrote: ↑
Tue Jan 03, 2023 6:17 am
You could mount 10M as initial value, if it does not work, you could decrease the value until crystal works.

Wow very interesting, thanks for giving this suggestion, I will never know this, if you don't tell me.

ESP32 Forum

ESP32 RTC Crystal Parallel Resistor selection

ESP32 RTC Crystal Parallel Resistor selection

Re: ESP32 RTC Crystal Parallel Resistor selection

Re: ESP32 RTC Crystal Parallel Resistor selection