I looking to minimize the power usage of a circuit using HC12.
According to the HC12 datasheet:
Power supply input,
load capacity not
less than 200mA.
According to my measurements: it consumes 72mA while constantly transmitting and 16mA in idle.
The FU power saver modes I dont want to play with and anyway even the FU1 is 3.6mA which is way too high for my battery powered circuit.
I have considered using a transistor to turn ON and OFF the HC12:
What I noticed with the BC337 using the exact same circuit is that when the device is off the flow through current between the Collector and Emitter is between 1mA-8mA. It might has something to do with what's on the HC12 board maybe some capacitors causing this I don't know.
Of course I could just use a relay and it is then a clear cut but as we have transistors invented they must be good for something. I have the following other types: BC327, BC549, BC550, BC517, BC556, BC547, BC557, BC548, BC558.