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    Current Limiting Technique

    You should spend time on this since you are dealing with 12 lead-acid batteries in series. The issue I see is that your cables and coil that have some resistance will heat up too thus changing your current limit. Use liquid nitrogen for your resistor will affect its resistivity so you will...
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    opamp roll-off

    Guys dont bother with Kevin, he is a post bot to generate search engine hits.
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    [Project] Request specific built supply board

    I see. It happens that I am working on something similar but more complex (diagram attached) at the moment. It will be very hard to fit all the functions in the rectangle on such a small PCB but it is marginally possible given the low power that the circuit must handle. I would like to help...
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    [Project] Request specific built supply board

    Hello again. Please understand my reluctance to give out my email address like this. If possible, share what you are trying to do with the community. You don't need to include any confidential details if any. In your first post you say "manage the battery pack for water cooling pump" which is...
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    [Project] Request specific built supply board

    Hello, could you provide some further information on what exactly you want to do?
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    about d2dchina

    I say you have more chances of success if you are honest when advertising.
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    Project related to medical equipment

    http://www.elektor.com/magazines/2006/october/ecg-using-a-sound-card.58566.lynkx There is no need for additional formatting.
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    Free and open source electronic applications

    Hello, thank you for suggesting these. Have you developed these? I only refer to datasheets when I need specifications. But I can see the benefit of having a quick look at key characteristics. How about a stock database for a home electronics laboratory? This will include location of...
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    LT3757 as SEPIC Converter

    It is posible as the IC acts just as the controller in the circuit. The power switch, voltage divider, current sense, inductors,capacitors are external so by recalculaing their value (full details in the datasheet) you will be able to produce your required output. Also have a look at this app...
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    Trigger an SCR to switch a negative voltage

    Ah, I am with you now. Maybe the best/easiest thing is to switch off the HV PSU before firing the SCR.
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    Trigger an SCR to switch a negative voltage

    I think you have missed the point of Riccardos circuit. He is trying to dump the energy in the capacitor in the coil. The peak current will be several 10s of amperes after some time after the gate trigger pulse.The current will then decay as the capacitor discharges until it falls below the...
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    Trigger an SCR to switch a negative voltage

    Why is that? The holding current is the minimum current that must flow from anode to cathode for the SCR to remain in the ON state after the gate trigger pulse dies out. In this application the current flowing will be much much more than 1A even over short periods of time. If anything, one...
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    Trigger an SCR to switch a negative voltage

    It looks right to me at least the principle of it. You can treat the circuit as having a ground potential of 1kV and a positive potential of 0V in your schematic. That SCR of yours looks rather faint hearted...a job for my IGBTs.  :P
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    Equation for Draw on battery by electronic devices

    Your PSP uses a switch-mode regulator for its battery 100% sure. 5V 1.2A is the peak consumption. That is 6W. The switch mode regulator will try to draw as much power from the battery as needed by the PSP. So, if you use a 5V battery, the PSP will draw a maximum of 1.2A or 6W. If you use a 4V...
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    attempting 44.1khz 16-bit digital audio

    Consider a microcontroller with a DMA channel. Good luck!
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    attempting 44.1khz 16-bit digital audio

    No, you dont need to do that. The 12V of the amplifier is the power supply required, not the minimum input voltage. You are good to go.
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    Checking new PC power supply

    Have you switched on the power supply from the motherboard connector? Is it a 24 or 20 pin (the main connector) PSU? Does the fan rotate? http://www.ochardware.com/articles/psuvolt/psuvolt.html There are also cheap PSU testers...
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    Custom Car Remote Possible?

    I am sure finding someone will not be hard, but this is a low value item and the amount work could be considerable. The course of action I would suggest is to buy your remote remote start kit and install it. Place your extra controller with your car keys and try it for a week. After that ask...
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    Custom Car Remote Possible?

    So you want to fit ready made circuit board x into ready made enclosure y. Assuming x will not fit into y just like that, you will need to reverse engineer x and make circuit board z that fits in y.
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    Custom Car Remote Possible?

    Where will the existing circuit of the remote control (for central lock/unlock) go?!
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