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  1. S

    how do i drop voltage of a power supply

    I'm going to stick my 2-cents worth in here. I don't know your battery charger circuit, but some of them indicate a higher voltage when unloaded, than they do with a load. Just suggesting you verify that your power supply output with it's load, is still higher than you want, if you haven't done...
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    laptop power button

    Telling us the manufacturer and model number might get you better information.
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    Low value resistors

    How good is your software? Can you factor-in the resistance of the circuits, and then zero the value so that it reads the resistors for your test?
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    Sony DVP-SR200P DVD Player Repair Help

    If you're absolutely sure that the TV or monitor is set-up for the input you're producing (and you've checked that the TV or monitor displays color using other devices), then I would assume you have a component problem inside the DVD player itself. I know you feel certain it's not an interface...
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    LIghtning induced power surge signs/symptoms?

    Well, the destroyed breaker box, replaced by an electrician, would be evidence enough of the lightning damage. If your friend has the gumpshun, read the fine print on the insurance, and if he/she does not have a grievance process, I'd seriously consider filing a small claims court claim against...
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    LIghtning induced power surge signs/symptoms?

    Sounds like an insurance claim question. I don't know how you'd 'prove' lightning did the damage. This will come down to how cooperative your insurance company is. If everything worked fine before the lightning storm, and didn't afterward, I'd fight for lightning damage.
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    Sony DVP-SR200P DVD Player Repair Help

    Check-over the output of the DVD player with the input to your TV or whatever monitor you're using. There are so many different monitor (or TV) inputs available now, that you have to make sure your monitor is set-up for whatever your input signal from the DVD is. My dad had a new TV with an old...
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    Over voltage protection.

    It depends on the length of your voltage variances. Are these just occasional voltage spikes that are very fast in nature, or simple wide variances in the operating voltage. There are plenty of 'Surge suppressor' devices available (check eBay), or metal-oxide varistor (MOV) if you intend to work...
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    Questions about building an RCA switchbox

    You'll have to decide on the switch. You may get suggestions from others on this site to follow. My input is to be especially careful to use coax or some other high quality shielded wire, or you're going to wind-up with crosstalk (unwanted induction of signals and spurious noise from one system...
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    Bogen Multicom 2000 relays random clicking

    Sorry, no. It sounds like you've isolated all the outside variables that could cause your problem. I'd go over the connections to all of your in/output connections just to make sure something isn't loose. Then I'd wait for the vendor to fix their unit. I think you did a good job in trying to...
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    LCD SLF8384E

    Did you try asking the manufacturer if they sell parts for their gear? If they don't, maybe they can recommend somebody who will have stock on your display. It don't hurt to ask.
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    Instability on a diferential output amplifier

    Miguel. Just heat sinking them is not what is needed in this case. They need to be thermally sinked TO EACH OTHER. The heat sink between the two is usually accomplished with a sink that JUST connects the cases of the transistors together. They make sinks specially for this purpose. The...
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    Automotive LCD Broken :(

    Yeah. And automobile manufacturers are notorious for making their parts proprietary. Good luck getting one to just sell you the display, they'll probably want you to buy a whole new unit. Any possibility of checking wrecking yards in your area for a 'junked' replacement?
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    LCD SLF8384E

    Did you Google the part number? Some LCD's are custom make for a manufacturer's needs, but the fact that you have a part number might get you to a site that stocks them.
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    Instability on a diferential output amplifier

    My thoughts are around BobK's observation that it'd be nice to have a matched pair on the transistors, and keeping them at the same temperature is critical. They make dual heat-sinks for this purpose.
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    Assistance repairing an old, irreplaceable boombox

    I'm thinking along the same lines as everybody else. If you can't figure out what's wrong with it, buy the same model off eBay if you can find it and swap-out the guts. Or, what I would do, is get a working model with boards that will fit, and install the new assembly in the old housing. A...
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    efficient batteries.. help!

    I'm kind of thinking this is some type of homework issue. Maybe the professor is trying to get ideas from sharp students to get his own patent on whatever you come up with. Lord knows the battery industry would sure like to develop this.
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    How to control the speed of a 24vdc pump from circulating water temperature?

    The first thing I'd do, is contact Johnson, and explain your issue, and ask if they have any application data sheets for their pump. You never know unless you ask if the manufacturer has already accumulated data on their products. What you want to do is going to require interface temperature...
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    Another new guy

    There are so many associated fields in electronics that it might be good for you to tell us what you want to learn about, and then maybe get some direction on where to start. Everything is getting so specialized and micro-miniaturized, that we can probably offer you better advice if we know what...
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    Stereo receiver cutting randomly in and out

    Everything I've read in the posts here sound like good advice. Some may consider them dim, but you asked for bright ideas, so here's mine. I know you checked the cables. The first thing I do, especially if I moved things around, is to RE-recheck all the speaker connections, outside of the amp...
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