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    Problem with Synchronous Motor

    What is the supply voltage reading? Sounds like no power. Where did you get the "straight from 6v ac" adaptor? Perhaps show a few pics. Seems it will spin either direction and the "friction" you feel is probably just the gearing.
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    Sensor to activate a handicap door switch

    Hospital egress systems we used to install were relatively long range, 3 metres if I remember correctly. Patient to be monitored would wear a wrist band, and the alarm system transcievers were placed either side of any required door way. One unit, inner, was on the wall around 2.2 metres and the...
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    Laptop lid sensor...

    One can usually get access to service manuals for laptops quite readily and freely. Try manualslib dot com, or just google compaq cq57 service manual. It should come up with a manual you can either view online or download for future reference.
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    Running house LED lights on AC

    You know the monkey and bucket of water efficiency formula then.....:):)
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    Too good to believe...?

    Seems to include the 10x probe......many queries, all answered below the description. Aus cost is $125.00. Government here decided from the 1st July to add 10% gst ( goods and services tax) to everything coming in from overseas.Previously up to $1000.00 was exempt. Usb for recharge BUT they...
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    Where can I find Ferric Chloride Hexahydrate in the USA?

    Looked at circuitmaker (used it before) as they say there is a "free" version for hobbyists etc. but only looks like a 15 day trial as far as I can make out. They can be a bit devious like this sometimes. Any comment?
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    Power Cap.

    Look it up....
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    Continuity Tester for Codger...

    How about magnetic earpiece or an electrocet mic coupled to one of the $2.00 amplifier modules on Ebay coupled to a set of elcheapo headphones. Stick the mic on the multimeter ....... Amp...
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    Is Kester 44 60/40 rosen core solder correct for general work?

    Turps will give flux the business also. May not be so good for surrounds though.
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    PWM - Potentiometer ohm importance...

    In the first link to Ebay, the photo of the pot on it's own shows B10K written on front of the bakolite insulator opposite the 3 terminals.
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    Power Cap.

    This is not strictly correct. Think you will find that even though there are some things one can do, there is still a need for checking by registered lecky and issue of notification. As most won't touch that with a 40 ft pole because of how it just leaves one completely open to getting ones arse...
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    Pedal powered generator

    Wellllll....lovely attitude I don't think. Fair go bloke....the Op is building something for his kids and I for one give him 10 out of 10 for that alone. I'd be waiting for a call from the moderators on this one for sure if i were you.
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    Understanding N channel and P Channel FETs

    Me too... Thanks
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    Marantz CD6002 Disc Tray

    Now here's a shocker. I just Googled Marantz CD6002 and guess what came up? Yup....a complete 54 page service manual in pdf file.:eek::eek::eek:
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    Variable time on/off switch circuit, for model tree-house project

    Well done.:cool::cool:
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    Potentiometer Lubricant

    I just use wd40 or crc.
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    Motor peculiarity

    Know how you feel. Chased an intermittent open in a starter motor used for a hydraulic hoist on one of the work utes. Finally found it, traced down to aluminium rivets that hold the brush-holder and transfer the armature current. Thing was, every time it would go belly-up, fault would disappear...
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    Variable time on/off switch circuit, for model tree-house project

    No, not at all. What I said was if you get a 555 version and hack that, or/ you could hack your present unit by looking at how the relay is operated. I think you will find the transistor adjacent to the relay is the one that operates it. Either get some numbers off it to determine what current...
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    Thermistor help

    mmm...well,.... when I said show details what I meant were the specifications, perhaps I should have been clearer. As you can probably appreciate, there is not a lot one can do to narrow down any detail from the difference of 2 "blobs" on the end of 2 wires. Other than that, the only advice I...
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    Different numbers should activate different LED

    Keypads to go with the Arduino can be had from Ebay for a couple of dollars. Flexible membrane with a short connection tail. Many examples for the code on Google or better still, do some reading and "roll your own" as you will learn more that way. Arduino forum will not write your code for you...
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