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  1. H

    Transient voltage suppression

    In an Arduino based pump controller I am using a 30 amp magnetic contactor with a 120 VAC coil. I put 2-10 amp (1N10A10) diodes across the coil in hopes of suppressing high voltage noise at coil shut off. I tied cathode to cathode of the diodes and relied on reverse breakdown voltage to be...
  2. H

    HAMs

    Is @bertus still around? I'm looking for instruction on using a pair of HAM capable walkie talkies I have. I believe bertus is an experienced HAM operator.
  3. H

    HAM radio operation

    I recently purchased a pair of BAOFENG hand held transceivers. I have watched a half dozen YT videos but still have no idea as how to use my new radios. I am looking for personal tutelage or a site which does an in-depth explanation of my radios and how to use them.
  4. H

    Battery treatment

    I am using Lifepo4 batteries for power storage from solar panels. My inverters sound an alarm if battery voltage drops below 10 volts. I have been consistently running batteries to a 10 volts level. When alarm sounds, I disconnect the discharged battery bank and connect circuits to a fully...
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