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    dehumidifying device

    That would be infra red heat and would not heat nor dry the air and ,as already pointed out, inefficient and cost an arm and a leg to run. Short of taking the roof off during the day and replacing it at night, the rac is the best of efficiency and cost of running. Removing moisture requires...
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    Rotary tool - what battery V and what Vmax for motor?

    If it is like below then I'd say motor is max at 6v.
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    traffic light australian with 2 555 timers

    Have a look here...... When you get a chance, look up some tutorials on Arduino. Jeremy Blum has an intro series on youtube that are easy to follow. Also Ralph Bacon and Julian Islett. Many others.
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    dehumidifying device

    Air con is the most efficient you will get. Water coolers just pump in more and more.
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    Need help regarding led focus light circuit

    Nope...looked but didn't see any reference to the one you have there. Do you have a link?
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    traffic light australian with 2 555 timers

    The "secret" to operation of the first circuit is not to have variable resistors in the cap circuit or/ to have them each set to a value as shown in the "Talking electronics" site. Look under "traffic lights" in the left side panel in the interactive section. There is a complete explanation...
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    motherboard is not giving power to fan

    In the photo, is that a third (red) wire pulled out of the plug for the fan..?? Most usb will not have enough power for a fan, especially a laptop usb. Voltage may be too low also. Depends, you have the gear, we cannot see.
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    Need help regarding led focus light circuit

    Probably an internal feature of the program. Just curious as to where you bought this unit as I've been looking for a focus lens for 6 leds for another purpose.
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    IFR FM/AM 1500 battery turns itself on and can't shut it off.Manual has no schematics

    Manual says there is a power /off/ battery selector. section 2-1 at the bottom left.
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    Lead acid battery

    Now you're being argumentative. Up to you.
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    Lead acid battery

    See #56
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    Lead acid battery

    Many motorcycles still use 6v. The old world famous VW beetle was 6V as were many more. Plenty of 6/12v smart chargers available, Ebay or where ever. You can get some ideas from Talkingelectronics site. http://www.talkingelectronics.com/te_interactive_index.html Another here ( for 12v but...
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    Make Electronics Experiment 8 -Problem

    Photo shows switch across the two 5mm spaced terminals which I believe for a tactile switch that this is correct. Difficult to know where the relay pins are with respect to the breadboard connections though, especially for the coil. Photo also shows the relay not energised.
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    Flurescent Lamp possible ballast issues

    If the switch is not working any components would hardly get "warm". Not an ideal way of testing really especially given the mains voltage component. Did you test continuity of the wiring from the tube socket pins down to the electronic ballast..? Did you check for heater circuits on the...
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    Make Electronics Experiment 8 -Problem

    I have found in the past that some of these dc relays are polarity dependant on the coil. That might be worth checking also.
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    Flurescent Lamp possible ballast issues

    I'd be looking for the obvious i.e. where the lamp plugs in to the 4 pin socket. They are round pins and notorious for burning out from the heat of the lamp. Perhaps trace down to the ballast ( electronic..no tar in these fellas.) and check for the 2 heaters from there .
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    Buzzing sound in speakers

    Looks like this ........... Shield is normally attached to ground (frame....negative ) at the amp end and not the other
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    Chip Burns Out

    Exactly.......Especially with the Op's finger poking around introducing all sorts of noise. TB6560 driver...?? Where did you get the connection /operation diagram? Might be better to show what you have in front of you.
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    Buzzing sound in speakers

    Commonly known as a rats nest for good reason. I'm guessing the small perforated board adjacent with the unshielded wires is the inputs.
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    Newbe Help with this schematic

    Nah...He's from Canada so more likely "French". o_O You might want to take a peek at Talking electronics web page. It has many such circuits and a host of other projects good for beginners as well as others. Books, circuits, explanations...all good. For your present project scroll down the...
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