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  1. dicky

    Question on the Plants Watering Watcher circuit

    have seen ...thanks....dicky
  2. dicky

    Question on the Plants Watering Watcher circuit

    I've just downloaded the circuits for the watering watcher..I read the text where it says A square wave is used to avoid oxidisation..my knowledge as an "improver" allows me to think that electrolysis would be the enemy of the probes..can some one explain why a sine wave is US and why oxidation...
  3. dicky

    Cold Heat Soldering Tool

    Yeh!..I like my Weller too..One thing to know though..Some brands of resin core solder are not 60/40..they are 50/50 in make-up [tin/lead]... this leads to more heat required and sometimes ruined PCBs [ watch the cost of tin on the stock market ]...Dicky
  4. dicky

    Question on the Plants Watering Watcher circuit

    If you place a 5K or 2K [depending on the current in the circuit]t-pot in the LED circuit you can alter the threshold of operation of the LED and dimming will occur. I haven't seen the circuit so I may be talking thru my hat......Dicky
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