Search results

  1. T

    replace a 9v power outage backup sorce

    I have an older water controller for a sprinkler system. It's working voltage is 24vAC that is quite normal and common. The electronics portion has a 9v (DC) battery supply that keeps it's memory and program intact during a power failure. Most of our power failures are nothing more than a...
  2. T

    diac troubles in a heater circuit

    I have a rather simple circuit that controls heating elements. After testing each component, I find them all good except the r20 (47 ohms resistor And the diac.( the diac show a few ohms in each direction when tested with an ohm meter). I have replaced the 47 ohm resistor but don't have an idea...
Top