Atmega 16 help | Microcontroller › AVR › Atmega 16 help This topic has 2 replies, 3 voices, and was last updated 12 years, 4 months ago by AJISH ALFRED. Viewing 3 posts - 1 through 3 (of 3 total) Author Posts May 30, 2012 at 8:33 pm #1826 RohitParticipant The voltage at any output pin is very low.In a simple LED lighting circuit ,the LED lights dimly without any current limiting resistor.Plz help…. May 31, 2012 at 2:45 pm #7944 AmrithParticipant hi rohit.. The above behaviour happens when there is no proper Vcc voltage at the controller, for ATMEGA 16 the acceptable Vcc voltage is 4.5V to 5V, kindly check your source voltage given to the controller(Vcc pin voltage) & let me know. May 31, 2012 at 4:54 pm #7945 AJISH ALFREDParticipant There should be something wrong with your power supply, may be it is giving low voltage than required or unregulated voltage. Author Posts Viewing 3 posts - 1 through 3 (of 3 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In