I purchased 10PCS Socket Adapter plate Board For NRF24L01+ Wireless Transceive module and would like to know how much current/power it will draw as I want to run a project on batteries.
A close-up of the unit is below.
Using a multimeter, I measured the following current from 7 of these units (powered from 5.2V source):
4.67, 3.85, 4.70, 4.58, 3.93, 3.78, 3.80mA.
I scratched the power LED off another unit (LED is between GND pin and IRQ pin), and measured 3.28mA.
My question is, is the current I can see (minus the LED current) the quiescent current of the 3.3V voltage regulator? Also, there is no nRF module plugged in to the socket; does the regulator need a load before I can measure its power usage?
I think this is the regulator - Advanced Monolithic Systems AMS1117 1A LOW DROPOUT VOLTAGE REGULATOR, and there's a row in the datasheet with these values: