555 timer operates from a range of power supply at_____ All Questions › Category: Analog Electronics › 555 timer operates from a range of power supply at_____ 0 Vote Up Vote Down Rajasri Mundrathi Staff asked 3 years ago Options: a) +5 volts to +18 voltb) +18 volts to +20 voltc) -5 volts to – 18 voltd) -18 volts to -20 volt 1 Answers 0 Vote Up Vote Down Rajasri Mundrathi Staff answered 3 years ago The correct answer is +5 volts to +18 volt