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  1. B

    Two power supplies, switched by loss of one

    Maxum (for one ) had this covered years ago with battery backup chips. https://www.maximintegrated.com/en/products/power/supervisors-voltage-monitors-sequencers/battery-backup-ics.html
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    need help please

    Somehow I don't think you will get any repercussion.:cool:
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    Hooking up deadbolt motor to TB6612FNG Stepper Motor Controller

    Still has me baffled as to why you want to chop into this unit. By the looks of it, it already does what is required, however................ Hevans1944 has already provided you with a re-formatted pdf file with all the info needed..... Circuit diagram page 7 IC usage considerations page 9 and...
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    need help please

    Mmmm... Learn something new every day
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    Turning a flashing led circuit into solid? Pics inside

    Don't know where the image of a "wallwart" is......??????
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    Hooking up deadbolt motor to TB6612FNG Stepper Motor Controller

    Motor in your unit is a series motor, not a stepper. Not sure about the controller as the pdf wants me to download some extra font files which I am not about to do. What is it you are planning to do by hacking the apparent "new" device.
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    need help please

    Need a lot more info to be of any help there.
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    Turning a flashing led circuit into solid? Pics inside

    Relevance is in the non-isolated factor, not whether it gets wet or not.
  9. B

    need help please

    Don't think you will find too many 40Amp 600V diodes in any general household appliances. Do you have an alternative or is it for use in a particular device?
  10. B

    Turning a flashing led circuit into solid? Pics inside

    Looks like a non-isolated output, rather dangerous bit of gear to be strapping around the room at Christmas ( or any other time)
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    Why is this LED not 20 Watts?

    That would be "input" readings I assume? .....in that case I'd say .....solved
  12. B

    Why is this LED not 20 Watts?

    So what are the actual readings..?
  13. B

    Why is this LED not 20 Watts?

    Same as #6 link...no...?
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    Getting kids into electronics

    Crystal set with the added option of purchasing components for a whopping single transistor amp. Biggest hurdle was getting info to feed the brain cells.:confused:
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    Why is this LED not 20 Watts?

    Steve, As the specs showed the change in output relative to input voltage I was assuming the output voltage would be changing also. ( output 21v-38v)Trying to get at how the op came to his conclusions rather than just a quoted 9.1w but doesn't seem as though that info will be...
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    Why is this LED not 20 Watts?

    Well, I will quote it once again directly from the specs ...... Changes in constant output current depend on supply voltage
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    Advice on LCD display for Picaxe project.

    Have you considered looking at Arduino as a means to control your LCD? Think you will find it is much easier both to implement and understand. Use of clone boards keeps the cost at a minimum also.
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    Why is this LED not 20 Watts?

    What is the "measured" input and output voltage and current in your test? I am aware the standard voltage in Thailand is 220 just as I know how much it can vary.
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    Why is this LED not 20 Watts?

    According to this, which appears to be the same unit......... http://www.ebay.com.au/itm/10W-30W-50W-100W-LED-SMD-Chip-Bulb-Bead-LED-Driver-Transformer-High-Power-Supply-/162045933474?var=&hash=item25bab0b7a2:m:mrAkcjQIpzv6_W3UHOODO7A Quote ...." Changes in constant output current depend on...
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    Why is this LED not 20 Watts?

    Just at a guess I'd say the supplier is doing some sort of comparison between tungsten, fluro and led. Led consumption may not be their favourite as this way you seem to get more than what you pay for. The old saying buyer beware comes tomind.
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