MXO2 driving 7-segment units without current limiting resistors

Home Forums STEP MXO2 Development Board MXO2 driving 7-segment units without current limiting resistors

This topic contains 0 replies, has 1 voice, and was last updated by  steven 3 weeks ago.

Viewing 1 post (of 1 total)
  • Author
    Posts
  • #107

    steven
    Participant

    I just wrote my Verilog source file to drive the 2 on-board 7-segment LED units so that they auto-increment and display decimal number from 01 to 99 continuously. The source code is ok but i have found that both the 2x 7-segment unit and the MXO2 were very hot, after just less than 20 seconds of running! I check the STEP board schematic and found that there is NO resistor around the 7-segment units to limit the current. In contrast, there are 1K resistors around the discrete LEDs as well as the tri-color LED. like to know the reason for not including current limiting resistors for the said 7-segment LED units the soonest. Thanks

Viewing 1 post (of 1 total)

You must be logged in to reply to this topic.