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    Carbon ribbon cable repair

    Completely cut in half, new cable.
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    Grounding a Ham Antenna

    Best way is make an adaptor to loosly slip over the drive end of the rod, and insert adaptor into a medium size jackhammer. Used this process for many years.
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    Red LED voltage seems wrong

    Yellow wire connects one side of the LED(possibly positive), orange to the other (and possibly negative), 470r resistor seems to connect to other things. Then again if pos rail and neg rail on the breadboard are indeed supply, what are the two cables for? Time to supply a drawing of what you...
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    cfi chirps every 50 seconds..

    We chased a reported beeping smoke alarm for a few days on and off in a retirement home. Never a sound when we were there, except on the last day, mobile phone battery went low. Old dear was so happy when we found it....that's it , that's it!!!!!!!!!
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    Auto Battery Charger Blowing Fuses

    I am a Mechanical Engineer with some training in EE Yep...seen quite a few of those in my time.
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    cfi chirps every 50 seconds..

    Can't Find It........... :D
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    Increasing the output voltage of a step-down transformer by reducing the number of coils

    Looks to me to be a standard old run of the mill torroid transformer but who knows unless it's ripped apart or tested by someone who knows what they are looking at. If the former then it's knackered anyhow. Chances of an amateur getting it up and running again are fairly slim to say the least...
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    Grounding a Ham Antenna

    If you get a lightning strike, it'll liven up all your house electrical. I would run separate as recommended. Usually a direct run to ground via maybe 6mm earth and a separate 4Ft ground rod driven a good 3ft into the building exterior ground. An electrical earth rod (Copper coated steel about...
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    Auto Battery Charger Blowing Fuses

    The unit is essentially a switch mode power supply (smps) and unless you have a certain level of knowledge with electronics then you are facing a rather steep uphill battle. Blowing the primary fuse can mean rectifier diodes shorted or large caps faulty, or perhaps the switcher ic faulty or...
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    LCR-T4 replacement display ideas wanted

    Whole thing is only $20 odd....better still, spend a bit extra ($30) and get one in a case.
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    Battery tester project

    It also reduces the actual load as the load then becomes a factor of on and off time.
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    holder glues on cheap boards

    Use non-acid (as used in electrical) silicone sealer.
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    2 latching relays, 2 pushbuttons, 2 dc 5 Volt motors and 4 limit switches

    No worries...thought they were standard relays..... nothing marked so who would know. Limits are still in the motor power lines and no way to stop except manually press limit. Soon as released it would run again. Still an upshot design......
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    2 latching relays, 2 pushbuttons, 2 dc 5 Volt motors and 4 limit switches

    No button latch......
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    2 latching relays, 2 pushbuttons, 2 dc 5 Volt motors and 4 limit switches

    Unusual to use latching relays to begin with as any fault requires activation of certain sections of the control circuit to shut the motor down rather than fail safe where things just stop with control circuit deactivated. Limit switches as a result of the above, instead of being in the control...
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    Battery tester project

    Constant current discharge on a small scale is easy enough and then monitor what ever you like with the Arduino. There are many such Arduino monitoring code around you could piece together. A 200Ah battery discharge control would be a different story though if at high amperage.
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    LCR-T4 replacement display ideas wanted

    ok...
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    I'm seeing 5"-long caps marked "3000F"! Did they change label units??

    So you would latch on to it fully charged anyhow? I doubt it.
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    LCR-T4 replacement display ideas wanted

    Looks like an Oled display...even if compatible, soldering of that very fine pin pitch would be normally a solder flow robot job. Good luck with a 40w bench iron.
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    I'm seeing 5"-long caps marked "3000F"! Did they change label units??

    Photo shows 3v........ description says 18v....... Never trust Chinglish
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