I'd be especially interested to hear from people who have used 2108a DC booster. Is it working reliably for you?
I have a project with Mini Pro 3.3V/8MHz, some sensors and nRF24L01+. Average consumption seems to be about 16mA.
The requirement is to power the project with 2 AA batteries (using Ni-MH now). It will be a handheld device, so I don't want to risk dealing with Lithium complexities.
Currently, I'm using a MT3608 DC DC step-up boost converter to get 3.3V out of 2.4V. It works reliably, no issues whatsoever.
Then I thought I'd like to use a lower power converter because I don't need 2A and also there's no use for that potentiometer if I need fixed 3.3V.
So I bought some 2108a voltage regulators. They are tiny and are told to support 160mA-400mA at 3.3V. Should be enough, I thought.
Still, when I connect my project to the 2108a, it behaves unreliably. The voltage is ok-ish at 3.24V and Mini worked fine, no resets etc., but there is obviously something wrong with SPI communication or nRF24L01+ because there's insanely high packet loss. Unfortunately, I don't have an oscilloscope to see how stable the power of 2108a is.
I have a 10uF cap soldered on nRF24L01+ VCC and GND, but it doesn't help.
What could be wrong with those 2108a? Could they be unable to provide enough juice for nRF24L01+ when it's transmitting? Is their output too noisy?
Are there more reliable small fixed-voltage 3.3V DC boosters?