ESP8266 Community Forum

- Sat Aug 12, 2017 11:39 am #68990 Hello,

I'm using wemos powered from li-ion 18650 with enabled Wi-Fi and photocell connected to A0 (10K voltage divider).
Due to current spikes from ESP, voltage drops frequently about 500mV and photocell becomes unusable.

I've tried electrolytic caps (470uF) as close to ESP as possible but it hasn't helped.

Thank you for sharing your ideas

This is my connection

- Mon Aug 14, 2017 11:24 am #69048 I don't think it's the issue. 5V pin goes directly to RT9013 LDO which, according to the datasheet, has operation voltage from 2.2V to 5.5V. I thought that adding electrolytic capacitors will help, but unfortunately, it didn't.
May I try tantalum or ceramic caps?

- Mon Aug 14, 2017 12:24 pm #69053 I don't think it's the issue. 5V pin goes directly to RT9013 which has operation voltage from 2.2V to 5.5V.

// Sorry for double post