EmonTX - use of IC2

jinu_j · 2017-09-07T08:27:05.594Z

HI Folks
Was studying the power supply part of the the EMON tx and for the 3.3 V in the schematic is see two parts one using the TOREX XC6206P332 called U$6 which will give 3.3v output, but there is a parallel circuit using the IC 7805 called IC2 which give 5V output. But in the actual PCB the IC2 does not seem to be there. What am i missing ?

Robert.Wall · 2017-09-07T08:45:13.839Z

Nothing. It has, as far as I know, never been used. The emonTx does have two regulators, one is used when power is from the 5 V d.c. supply or batteries, the other when power is taken from the a.c. adapter.

glyn.hudson · 2017-09-07T16:28:39.203Z

Yes IC2 is not populated and never has been. It was just an option in the early stages. I left the pads on the board since they are useful debug points to measure the supply voltage etc.

jinu_j · 2017-09-07T16:53:50.634Z

Thanks folks that clears up a lot of my confusion.