Advantage
New Member
Hello, I have a question about my 7404 Inverter and was wondering if any of you could give me some help. So here is whats going on...
on my solderless breadboard I have a 9 volt battery connected sending power and ground up the rails as is standard, off of that I am feeding the 9 volts into my 7805 5 volt regulator which is also grounded. The output pin from the regulator goes to pin 14 on my 7404 while pin 7 of the 7404 is also grounded to the rails. Lastly, I have a magnetic door switch made by GE which goes from the +9V rails to one side of the switch then the other side of the switch goes back to the breadboard and to a 1MΩ resistor (I have tried many different values of resistor). The resistor I have connected to many pins but when I apply my voltmeter, even without any connections besides the power and ground to my 7404 I notice that Pin 1 reads about 1.62V then Pin 2 reads about .15V Pin 3 is at 1.62V Pin 4 is about .15 etc... this pattern continues all the way around the chip except obviously the 5V in and 0V for my ground. Can someone please help me figure out what is going on here? Did I buy 20+ broken 7404's? =/
on my solderless breadboard I have a 9 volt battery connected sending power and ground up the rails as is standard, off of that I am feeding the 9 volts into my 7805 5 volt regulator which is also grounded. The output pin from the regulator goes to pin 14 on my 7404 while pin 7 of the 7404 is also grounded to the rails. Lastly, I have a magnetic door switch made by GE which goes from the +9V rails to one side of the switch then the other side of the switch goes back to the breadboard and to a 1MΩ resistor (I have tried many different values of resistor). The resistor I have connected to many pins but when I apply my voltmeter, even without any connections besides the power and ground to my 7404 I notice that Pin 1 reads about 1.62V then Pin 2 reads about .15V Pin 3 is at 1.62V Pin 4 is about .15 etc... this pattern continues all the way around the chip except obviously the 5V in and 0V for my ground. Can someone please help me figure out what is going on here? Did I buy 20+ broken 7404's? =/