how to convert frm 2.5V to exact 5V? | Microcontroller › PIC › how to convert frm 2.5V to exact 5V? This topic has 1 reply, 2 voices, and was last updated 11 years, 10 months ago by george. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts June 12, 2011 at 8:45 am #998 thanikaiParticipant hi guyz, any idea to vonvert 2.5V to exact 5V… the voltage frm output port is 2.5V someting which connected to RELAY.. but 5V is needed to activate that relay… July 27, 2011 at 5:02 pm #6539 georgeParticipant voltage is kind of energy, cannot be created nor destroyed. Thus, u need external source to power up. Author Posts Viewing 2 posts - 1 through 2 (of 2 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In