Mounted 4 relays on the bread board and laid wires on the board. Tested switching with the ULN2003A using a 12 V and a 15V supply. Connected 15 LED's in groups of 8,4,2,1. The relays were connected in a way so as to be able to choose any number of LED's between 0 and 15 . Interfaced 4X4 tactile keypad switch matrix and LCD. Wrote code for open loop system by approximatin the drop accross LED to be 2.1V.
No comments:
Post a Comment