Im building a small sensor device on the ESP-01.
When running the ESP on my bench power supply on 3.3V (with the uart adapter attached and usb is running) everything is fine and the ESP transmits data.
When I plug the same ESP on the breadboard with batteries and a LF33CV voltage regulator and 4x1.5v Nimh batteries the power LED is on but the ESP does not transmit at all. The voltage should be 6V in total so the LF33CV should get enough voltage. The max. current of the LF33CV is 500mA but the ESP draws 300mA max.
So I dont understand why the ESP does not start/transmit data.
Measuring the voltage gives me 3.3V so everything should be fine.
When I put 3x1.5V Nimhs on the ESP directly it starts and transmits data. But that exceeds the specs of the ESP, right? That would be 4.5V in total and would burn the 3.3v if used for too long?!
See attached my breadboard circuit.
What a Im doing wrong?
Thanks for your help!