Driving Relay by Jane Ifurung .

I'm using a +5V DPDT relay and I had a problem with regards to energizing its coil. I tied one end of its coil to +5V and the other end to an AND gate output (MM74C08N). The relay should be energized when the output of the AND gate is logic 0 and deenergized when logic 1. However, when the AND gate is supposed to output logic 0, it always stays to logic 1 (this is when it is connected to the relay). Does this mean that the AND gate is being loaded by the relay? .... sort of loading effect? I also tried using AND gate buffer (CD4081BCN) but to no avail. It can't drive the relay. .... Now, I was able to solve the problem stated above. At the AND output I inserted a buffer(74F244) and tied the buffer output to the other end of the relay coil. It worked! My question is, is there an alternative solution? Buffer consumes space. Jane ===== *~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~ Jane Ifurung UP Diliman, Quezon City 920-5301 loc 5854 (632)731-3545 jifurungspam.....eee.upd.edu.ph *~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~ __________________________________________________ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com