I have 4 of these 2n3904 transistor setups on my board:
A1 -- requires 5v on these 2 connected pins to be enabled. I control this by driving r2 high at 3.3v which should allow 5v to flow through the collector.
I am considering this alternative approach of using a sn74lv1t34dbvr .
It appears I could drive this as follows where the ESP32 is the microcontroller I want to control power to the FSTD chip, via the SN74 regulator chip I have added to the circuit: