jknightandkarr Posted April 15, 2016 Report Share Posted April 15, 2016 I am trying to make this KITT's dash compass andi have the leds and using a microcontroller to power them but need help on how to wire them so i use the least amount of conponents possable. I thought of darlington transistor ic's but on the 4 10 led bargraph onesi think both anode n cathode will need darlington transistors. 4 1 for either common cathode or anode and 10 more for the other lead for make the patterns. I might be able to use 1 darlington transistor ic to make the yellow triangle leds work using just 4 i/o pins, but i think i need 14 for the red bargraps whats the best way to wire the bargraph leds up? Thanks.Joe sam g fire 1 Quote Link to comment Share on other sites More sharing options...
admin Posted April 18, 2016 Report Share Posted April 18, 2016 How many digital IO lines do you have on your microcontroller? and how many LEDs do you want to drive? sam g fire 1 Quote Link to comment Share on other sites More sharing options...
jknightandkarr Posted October 19, 2016 Author Report Share Posted October 19, 2016 Sorry for the delay in the reply, haven't been on in quite a while. To answer your question, I have 3 different microcontrollers, The Basic Stamp 2, Arduino Uno, and the Propeller Microcontrollers. So far planning on using the Propeller, so there's 32 I/O pins, but I am concidering using shift registers to run the LEDs. Digital Compass This link above is the compass I am trying to create. There's 4 larger leds arrays and the 4-10 segment bargraphs. I need the N/S n E/W LEDs to be able to light up for N, S, E, W, NE, NW, SE & SW, and the Bargrapgh LEDs Need to sequince up like in the link, but that's programming and so far not really relevent to this at the moment atleast. Joe Quote Link to comment Share on other sites More sharing options...
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