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    Old Electronics Parts & Diagrams

    In the old style power supplies, capacitors were used to smooth the ripple on the voltage and the series filter (choke) is for smoothing the ripple on the current. In old valve radios, they (choke / series filter)served a dual purpose. That mentioned above and also to create a magnetic field...
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    Old Electronics Parts & Diagrams

    Maybe just a choke on the DC side. Hard to say, difficult see any connections. Bit of a rats nest really.
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    Simple current circuit regulator issues

    To begin with , it is much easier to read a circuit diagram if it is drawn in a conventional manner such as below. With regard to your circuit, I think you will find with the addition of the large value resistors, you are operating the LM317 beyond it's ability to regulate. Think you'll find a...
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    Basic Physics Question

    Energy is not created or destroyed but changed from one form to another. At least as far as we know it in this universe.
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    DC short circuit calculation formula for copper busbar

    Somehow I find your figures difficult to believe....some project...:eek:
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    Love chinese translations!

    Once saw a link to downroad pdf reader...
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    Problem: Schmitt Trigger not giving ON/OFF output

    Why not use a comparitor. Some detail and comparison in the video here............. http://www.bristolwatch.com/ele/vc.htm
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    Looking for a way to remotely open/close a circut?

    Seems simple enough to me to set up a microswitch with a lever arm contacted by the servo arm output. None of the drawbacks you mention. Operate the switch somewhere on the servo arm arc.Doesn't have to be accurate, just on and off. Servo sweep full travel each way. Used the same setup...
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    Looking for a way to remotely open/close a circut?

    Servo mechanically linked to a switch.
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    Safe sequencing of power

    Did a sequence switcher like this about 10 years ago which also involved priority switching. Controlled 6 /30 metre poles with 3 x metal halide 400w fittings on each spread over 2 football fields. Used a small commercial PLC with aux relays at a central location controlling contactors at each...
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    PicoScope: Any users?

    ok.... the next suggestion was going to be perhaps a standard Ebay Usb to Parallel converter but it looks like you have some direction now. I have a later model Pico that is Usb...yet to use it though.
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    PicoScope: Any users?

    Terry, This bloke seems to have had similar problems. Might be worth a try. https://www.picotech.com/support/topic7311.html
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    shunt precission question

    Which one...there are quite a few on that page.
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    Multiple Miniature speaker project

    I used these in an electric model boat for diesel engine sound. http://www.ebay.com.au/itm/DC-5V-2-Channels-3W-Digital-Power-D-Audio-Amplifier-Board-Amplifier-Module-New-/351098620660?hash=item51bf1bcaf4:g:huIAAOxygPtStPcq you can get small speakers from Farnell and places like that ...about...
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    Record player motor voltages

    Wiring from the pickup head terminals under the turntable to your amplifier need to be shielded cable.
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    Reddish brown corrosive stuff

    Saw a movie with a scene of a similar theme that ended something along the lines of "how do you like them apples"?o_O
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    One button power door locks

    mmm..ok...how about this then..?:)
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    One button power door locks

    Just going through this and I am almost positive I posted another drawing but maybe didn't hit the "send" button. Anyhow ...try this ...........again.....
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    CircuitMaker 2000: Any users here?

    Have you tried it on another pc..? Does the pc support the program requirements..?
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    building radio control

    Systems for r/c aircraft need to be designed and built with many factors in mind, not to mention pleasing the people who control radio broadcasting. Not the type of project for beginners in electronics. In fact I doubt many of the well seasoned and very learned people in here would give building...
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