hi friends, I am trying to read the AC voltage signals from XBEE. I fed in the AC voltage to end device(xbee) adc1 and trying it to read from the coordinator. i can read the values but all of them are positive values.
My question is: How can I differentiated between positive and negative values. As xbee ADC is unsigned 10 bit. How can i accomplish my task.
My circuit output voltage is 50-60V. But xbee VCC is 3.3 volts how can i fed in the voltage signals to ADC of XBEE. Do i need to used resistors, to bring down the voltage.
Can anyone help me please, this is the part of academic project in wireless communication.