## Re: [misterhouse-users] OT: power meter watch circuit

 Re: [misterhouse-users] OT: power meter watch circuit From: Alan Womack - 2002-11-28 18:49:00 ``` >> Your description leads me to suspect that you havent got power and ground >> to >> the chip. Those connections are not shown in typical schematics, only the >> signal lines. There should be connections to two ther chip pins, one >> power >> and one ground. Havent got a chip manual handy, so I cant tell you which >> pins, but often opposite corners. I thought that perhaps this might be the case and went ahead and connected pin = 8 to power and pin 4 to ground. I just measured the voltage across them to be = 7.09v dc. I also suspect there should be a ground line back from the computer? Otherwise = how does pin 7's circuit get closed? Am I incorrect in my understanding this circuit should go HIGH when a light is = strong on the photo cell and be LOW all other times? It appears I am always = HIGH. Alan What could be next to check on? Thanks for the help, this will be a fun little toy when it functions. ```

 Re: [misterhouse-users] OT: power meter watch circuit From: Alan Womack - 2002-11-28 18:49:00 ``` >> Your description leads me to suspect that you havent got power and ground >> to >> the chip. Those connections are not shown in typical schematics, only the >> signal lines. There should be connections to two ther chip pins, one >> power >> and one ground. Havent got a chip manual handy, so I cant tell you which >> pins, but often opposite corners. I thought that perhaps this might be the case and went ahead and connected pin = 8 to power and pin 4 to ground. I just measured the voltage across them to be = 7.09v dc. I also suspect there should be a ground line back from the computer? Otherwise = how does pin 7's circuit get closed? Am I incorrect in my understanding this circuit should go HIGH when a light is = strong on the photo cell and be LOW all other times? It appears I am always = HIGH. Alan What could be next to check on? Thanks for the help, this will be a fun little toy when it functions. ```