using RPi 2B
when HAT is on top of RPi (pin-to-pin)…servos work fine
however I need to use external 5V source to power both servos
so…I tried to run jumper wires between pins 27/28 on RPi (SMBus 1) to 27/28 on HAT
& 4/6 (5V/gnd) on RPi to 4/6 on HAT
RPi does not show device (ie i2cdetect) and (of course) servos do not activate
what am I missing…I assume HAT should work without being on top of RPi!!
any help is greatly appreciated