I have a RF module (nRF24L01) and Li-ion battery with 3.7V nominal voltage, so when it is fully charged it can be a bit higher than 3.7V (I guess).
RF module can work from 1.9V to 3.6V and draws <13mA.
I know about LDO regulators, but I don't have such, rather don't want to buy it and I want to keep design simple.
So, becasue of 1.9-3.6V and low power consumption can I use simple, regular diode, like 1n4007, on Vcc line, to drop voltage?
Typical voltage drop is 0.7V. I know it varies with current etc. but I only need to lower it a bit and can do it up to 1.9V. So?