Mbed fun - NXP LPC 1768

This is a mBed NXP LPC 1768 setup on a breadboard together with 2 digit HDSP-5523 display from Agilent Technologies. It is a HER (High Efficiency Red) display however USB was not giving me enough power to power also the second digit. The microcontroller consumption is arround 100 mA without Ethernet module powered. additionally each MCU pin is giving 40 mA. Single digit has 7 LED segments + 1 as a decimal dot. Both digits have alltogather 16 LED segments which makes total consumption at 640mA (and that i haven't count in the MCU) - clearly not enough for a USB that provides only 0,5 A. So idecided only to test and power up single digit. Otherwise i would have to either scale down the current for each segment (but i don't have any resistors for this now) or use additional power supply which i don't have as well. Anyway it is great deal of fun to experiment with mBed.

Category:

Science & Technology

Tags:

• mobile
• video
• cellphone
• mBed
• breadboard
• electronics
• LED
• digital
• counter
• NXP