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    Need help designing a solar powered rechargeable device

    Those appear to be high brightness LEDs but without a data sheet no one would know. Leds require a certain voltage to work along with needing to have current limiting to the design spec. You can run LEDs at a much lower current than the maximum advertised without a noticable visual difference...
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    Star-delta starter connection

    Yes, well, you would say that wouldn't you. To "design" such an animal would require previous knowledge which, given you have to ask about contactor size, is obvious you have very little. In addition there is much more to starter design than just contactor size. Any starter/ motor combination...
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    Need help designing a solar powered rechargeable device

    I'd be rather suspicious of any claims of a nimh being 2800mAh. That aside, what you could do if it is a warning LED is either pulse it on at say a 60/40 ratio at full 20mA via say a cmos555 timer or use an off the shelf flashing LED. Yes, you can charge the cells while discharging at the same...
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    Star-delta starter connection

    Why do I get the feeling that was all a wasted exercise.:rolleyes::rolleyes:
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    Are Deoxit contact cleaners worth the money?

    WD40 or CRC probably does the same job.
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    Kenwood KC-208 and KM-208 please help

    That is a block diagram, not a circuit diagram.
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    Kenwood KC-208 and KM-208 please help

    So download it and post it here...... that would help.
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    Choosing the correct AC DC adaptor

    You will need the voltage and current ratings of the motor to begin with. Then, as it is a motor, factor in a savefty margin as motors tend to draw large currents at startup and can pull the voltage down to an unusable level if the supply does not have the capacity. Many instances, now that you...
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    Need help designing a solar powered rechargeable device

    Do you intend to run the LEDs during the day also, if so, why...?? 20mA (20) x 24 hours = 480mAh . You would need at least 3 cells in series to accomodate the LED voltage OR... Use some type of boost converter. Remember that say a nimh cell will have a certain capacity and only part of that is...
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    arduino uno R3 schematic and datasheets

    It should work just fine. Quickest easiest way is to add some code and try a few basic programs. Plenty of them in the IDE. I have used clone devices in all sorts of applications over the years without any problems what-so-ever.
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    Star-delta starter connection

    The current is based on the motor specs. Cannot follow what you are on about here........ however, a 25kw motor full load would be around 50A or more, depending. A 75kw motor would be around 180A or more. So I don't know where you are going with this. Obvious smaller one would not suit the...
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    Samsung 2017 Smartfridge component missing

    Photos are usually best description.
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    Need help designing a solar powered rechargeable device

    Several days may be too much time between recharge. Can you provide current specs of the LEDs , intended cell capacity and intended number of cells.
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    Star-delta starter connection

    Definetely ......or should i say, obviously. Line and delta contactor usually the same size and star can be smaller in relation to those. Also any overload unit will need to be calibrated/set to reflect star/delta. Most these days would buy an off-the-shelf starter to suit the hp range the...
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    Desparately seeking off button

    One can disable or Enable sounds in control panel if that is what you are refering to. Examples below where "Maximise" is highlighted and "None" is the selected sounds under the Sounds tab lower down. Also example of Enabled where "Critical Battery Alarm" being the app and "Windows...
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    CDI trigger circuit parts

    More than likely the "black box" I use and referred to would be a much better option all round. Can be either hall or points fired with a small additional circuit or sensor coil fired direct. Run mine on voltages from 7.4v lipo up to 12v gel battery. Video required a download, not online...
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    CDI ignition head scratcher

    One has to read the fine print....DSO138..... :oops: https://www.ebay.com.au/itm/264480362811
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    CDI trigger circuit parts

    Again, if it's an old engine, it would not be CDI. Likely either standard or impulse magneto, the later being used on the old hit and miss engines. Are you changing the existing system to your home brew CDI..??
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    CDI trigger circuit parts

    Nope, of no interest to me what-so-ever these days. Plenty of CDI how-it-works jargon on the internet without my tearing one apart with an even remote chance of reverse engineering given it is a "potted device". I found details on requirements for trigger and went from there to now, that's it...
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    Solenoid drive current limiting.

    Solenoid characteristics would need to have 9Khz as it's design frequency for correct impedance values and hense current draw.
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