May 31, 2010 #1 I imani9009 Newbie level 5 Joined May 30, 2010 Messages 9 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,332 See the circuit. I want to drive uln2803 with 5 volt signal on 1b input, The Vcc is 12 volt. But he 1C ouptut is two low to drive the relay.
See the circuit. I want to drive uln2803 with 5 volt signal on 1b input, The Vcc is 12 volt. But he 1C ouptut is two low to drive the relay.
May 31, 2010 #2 S sokrad Newbie level 6 Joined Nov 15, 2009 Messages 11 Helped 2 Reputation 4 Reaction score 2 Trophy points 1,283 Activity points 1,351 Some suggestions about your schematic design : Use ULN2803 output in open colector configuration. Replace the LED with your relay.
Some suggestions about your schematic design : Use ULN2803 output in open colector configuration. Replace the LED with your relay.
May 31, 2010 #3 I imani9009 Newbie level 5 Joined May 30, 2010 Messages 9 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,332 Can you upload the schematic file. Because as you suggested in the snap the circuit is not working