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    1970 Delco Radio Repair - audio distorted

    What is it like on a fully charged battery without any induced noise from a mains power supply? After all, that's what it is designed for. Probably never meant to be a HI-FI system in the 70's anyhow.
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    Converted UPS with two series of 48v to one?

    In theory, should be half the capacity as you stated. In reality, they're probably well on the way out also so maybe just a fraction of the output time.
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    Hall switch magnets.

    I use 3 x 2 magnets and they work fine but I use a different Alegro hall switch. You may not be aware of an alternative method using the hall effect with the magnet secured to the back of the hall effect and sense a rotating metal vane. I think hall I use is A1102 (not sure I'll have to look)...
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    555 Timer Circuit

    What is the LED you are using? When you say "connect to THE battery" ....which battery? The one in the diagram or the car battery? Length of the cable you are using should make no difference as the circuit only draws a few milliamps. Have you checked all your connections when you move to the...
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    Button to button circuit

    Maybe the light is a headlight and maybe the horn is DC.... maybe.. maybe
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    Button to button circuit

    Don't know the reason for rectifier but in answer to your query, perhaps just a simple changeover switch.
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    Need LED bulbs and power supply for repair.

    Do you have the specs on the new LEDs? A series resistor may be required to knock it down a bit.
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    Success at last

    It's not that difficult.:confused: If you are having trouble now, wait until you get past basic on off.
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    Electric motor needs start capacitor

    I am really curious how you determined that from the photos and lack of info supplied.o_O Have you see it before?
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    Success at last

    Most standard, elcheapo even, multimeters will cover from 1mA to 10A dc. You just need to learn to double check connections before switching on the power and set the meter to the appropriate scale beforehand. If in doubt, select high range first. As far as transistor testers, one can get by...
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    Car battery jumpstart gadgets

    Simple ? .....how about a spare auto battery maintained with "smart" trickle charger so it is ready whenever you need it. That takes care of the household part. As for the capacity, take the aforementioned battery and a set of jumper cables that will deliver 600 amp plus without dropping the...
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    TV Antenna Signal Combiner/Splitter Question

    Why not use a higher gain antenna? Combine that with a masthead amp. Any tv antenna installer should be able to do a site survey or already know the area and give a recommended minimum. If for digital FTA it gets a little more important to have the right antenna as one now needs to contend with...
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    High RPM Slip Ring Recommendation

    To begin with, I do not think those little motors would have any chance of spinning a 500 mm disc at even the low range of 1800 rpm. Secondly, I don't think you are aware of the centrifugal forces that would be exerted again at the minimum quoted speed. Time to do a re-think maybe.
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    High RPM Slip Ring Recommendation

    I think you need to outline exactly what it is you are trying to do to get any relative help. Personally I cannot see your getting anywhere near your rev range with a 500mm disc not to mention any additional load.
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    Op amp problem

    I would say that without at least, some circuit drawing with details, most others here will be also.
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    High RPM Slip Ring Recommendation

    That was my point also.....
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    High RPM Slip Ring Recommendation

    Why would you need sliprings?
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    Brain storming layout for safety lighting circuit. Help.

    I did not say use resistor divider for supply.
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    150 VDC Power Supply T/S issues

    By the look of the board, pot could be crappy also, along with the multi connector.
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    Brain storming layout for safety lighting circuit. Help.

    Input signals can be derived from simple voltage divider resistors so long as you design it so the input falls within the micro minimum/maximum on/off levels.
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