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    Timer circuit help

    Cooling systems are essentially a "built-in" feature i.e. water or cooling agent is normally circulated in an enclosure around the cells, not spray water over the top. Think any efficiency increase you perceive will be at the cost of reduced output from the build up of minerals on the surface of...
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    Suggestions on analog galvanometer ?

    Because of the weight/mass of the glass, I seriously doubt the movement shown would support it or indeed move the way you want.
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    Button with analogue output?

    There used to be what was known as a "carbon stack" which was to control 220v to a series motor on a sewing machine. Other than that, I imagine a pot connected mechanically to a foot pedal would do what you want.
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    What did we do before LEDs

    Local Xmas lights in a nearby suburb. Seems it is an addictive and VERY competitive passtime at this time of year. Not just the one house but many the same/similar. I'm curious where they get these things as many times I've seen one or two example at local hardware but never as many as this...
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    Assistance with wiring a 1S BMS board

    Different board, that's why the confusion. I also went by your video but the one the op shows is different. https://www.ebay.com/itm/1S-3-7V-3A-PCB-BMS-Protection-Board-for-1-Pack-18650-Li-ion-lithium-Battery-Cell/264086456658?epid=567188647&hash=item3d7cc78952:g:krsAAOSwzaJX60Fj
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    Assistance with wiring a 1S BMS board

    No, the battery is connected to B+ and B- The Load is connected to P+ and P-
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    Amateur (Ham) Radio and RC (Radio Controlled) Flight

    This is what qualified "instructors " are for. Was tricky with control line but worked ok. Quickly learned to control via either hand and any configuration. Close quarters though and one would hope the student had at least showered in the last day or so.:p Best thing to ever come along was the...
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    Amateur (Ham) Radio and RC (Radio Controlled) Flight

    My eldest might be of some assistance to you as well. He is retired (not by choice but rather political cutbacks) Aus/NZ/UK pilot. Currently with Insitu Australia (Boeing) in Aus. Have word cut-backs coming there also. Might be restricted in some respects but....... Also some control like this...
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    Amateur (Ham) Radio and RC (Radio Controlled) Flight

    So autonomous to a degree with supervisory control? There is already a small 3 phase generator unit used for repowering. Rather than engine driven, works like a cropduster pump with a wing mounted drive propeller. Not sure of output though. Think I saw somewhere where one could use a brushless...
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    Amateur (Ham) Radio and RC (Radio Controlled) Flight

    10 watts might stir up a hornets nest.
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    Amateur (Ham) Radio and RC (Radio Controlled) Flight

    Once a year in Australia, there is, or at least up until a couple of years back, a competition involving "out of sight" model aircraft. Legally conducted and supervised . Do not know of any particular forum offhand that supports the details but I certain there would have to be something...
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    Where to get shorting strap for terminal posts

    There are these as an alternative if suitable. https://www.ebay.com.au/itm/3-Pcs-4mm-Dual-Male-to-One-Female-Banana-Jack-Connector/301911041111?epid=1163367836&hash=item464b4ce457:g:PVsAAOSw9gRaOYMj:rk:6:pf:0
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    Old remote control repair

    Didn't see your model anywhere on Google but others have a manual button. It seems the remote may have been an added option. If so, there must be a set of terminals to which a set of voltage free contacts can connect. If that works, then any $10 remote relay from Ebay will do the job.
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    Which video adapter to use ?

    like this...?? https://www.cablechick.com.au/cables/vga-to-composite-video-and-s-video-converter.html?imt=1&gclid=EAIaIQobChMI7ITs3--i3wIVwyMrCh0q4wnAEAQYASABEgJDUfD_BwE
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    Fluorescent strip light blows fuses when switched off, but not every time

    You can look it up in the SAA wiring rules. https://www.worksafe.qld.gov.au/forms-and-resources/newsletter/esafe-newsletters/esafe-editions/esafe-electrical/2017-bulletins/the-wiring-rules-are-changing There are other associated requirements regarding trip time (for domestic) which is...
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    Issue with 18650 charging circuit

    You missed the point I was making. I'd suggest you read my reply more closely.
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    Fluorescent strip light blows fuses when switched off, but not every time

    Most domestic units are 30mA. Hospitals and the like are 10mA.
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    Issue with 18650 charging circuit

    Just be aware that the exposed jacket of those cells is the negative pole. I can see several exposed areas. If you have any exposed jacket near where either of those boards are resting, it could cause a short problem. Didn't happen to solder those wires while the boards were sitting on the cell...
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    Cheap N-type MOSFET for PWM driving many LEDs with 3.3 V logic?

    Or drive the gate via a transistor and higher gate voltage, say from the lamp supply .
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    Need A Lot Of Help

    I'd tend to go for the SD card first up.
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