I want to create a PCB using ( https://i.ebayimg.com/images/g/qmUAAOSwiwVWT6y0/s-l64.jpg ) for flashing a ESP-01 module and other purposes.
I plan on using the circuit http://arduino-esp8266.readthedocs.io/en/latest/_images/ESP_improved_stability.png
That is the same circuit I have on a breadboard and using to flash the ESP-01 module.
The unknown for me is the 3.3 V power supply.
I currently have a 3.3V wall wart that I purchased on eBay. It is supposedly rated 3.3V/1A.
I have 200 uF capacitors across VCC and GND on a breadboard.
I am able to flash the ESP-01 on the breadboard.
However, monitoring the ESP-01 module TX pin it appears the watchdog timer seems to be resetting the module and in general the module seems to be "unstable" at power up.
The module is flashed with v2.0.0 of Espressif's AT firmware.
I am guessing that the power supply may be the culprit.
What should I do to provide a well-regulated power source for the ESP-01 ?