- Joined Jan 6, 2018
The cmos digital clock that I built that I have in my room where I live in an adult home changes time when I plug or unplug the power cord. There is a nine volt battery backup. When I set the time with the power cord in sometimes the time would go ahead unexpectedly. I am powering the clock externally with a self-made 12 volt power supply using a 7912 voltage regulator. It is using CMOS counters and display drivers and OR and AND Gates and also CMOS inverters. I brought the clock to my mother's home in the Bronx for a visit and I noticed that when I plug and unplug the power cord the time remains the same and I don't have the dilemma. Could it be that some type of signal is being sent through the power line in the adult home that is disrupting the 120v ac power line that disrupts the clock? The adult home does have an elevator that operates all the time that may be 240 volts at three phase. Any thoughts? Before you guys told me to add .1uf bypass capacitors to the power terminals of the ICS but I didn't do that since the clock works good in the Bronx at my mother's home. Most of us, including me, are schizophrenics in the adult home and I'm thinking that somebody is sending a signal through the power line to do something wrong to us because of the clock's evidence. Another thought that I had is that the AC line voltage is not grounded properly but that would seem impossible according to reality. Would my psychiatrist be able to explain the problem? I really doubt it since they don't reinforce my paranoia.