Hi:
I was wondering if someone can explain the concept behind positive and negative power supply voltages ? For example some devices can accept +5V and -5V. Is this strictly for polarity purposes ? The magnitude is 5V in either case, I understand.
And, why do some devices accept 2 different types of inputs while others only accept one ? For example, one device accepts 5V while another accepts +- 5V ?
Thanks for your assistance.
I was wondering if someone can explain the concept behind positive and negative power supply voltages ? For example some devices can accept +5V and -5V. Is this strictly for polarity purposes ? The magnitude is 5V in either case, I understand.
And, why do some devices accept 2 different types of inputs while others only accept one ? For example, one device accepts 5V while another accepts +- 5V ?
Thanks for your assistance.