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Diver300's latest activity

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    Diver300 replied to the thread Transient voltage issue.
    I would just use a 7815 run from the centre tap to supply the 15 V rail.
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    Diver300 replied to the thread Transient voltage issue.
    Why have you got a zener? The 7805 won't work correctly on 7 V. Just use Ron Simpson's circuit with the regulator changed for a 7805.
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    Diver300 reacted to ChrisP58's post in the thread Transient voltage issue with Like Like.
    The 78L905 has an input up to 30Volts, so wouldn't need a preregular. That said, I often need to make 5V from higher rails. My typical...
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    Diver300 replied to the thread Transient voltage issue.
    I don't like the idea of regulating a voltage by the voltage drop from a zener, although it would probably work. You won't need as much...
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    Diver300 replied to the thread Transient voltage issue.
    Unfortunately, the absolute maximum input voltage for the LM1117_5 is 20 V. The pre-regulator is still needed if the centre-tap is used.
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    Diver300 replied to the thread Transient voltage issue.
    The rectifier output only goes up near the peak of the 50 Hz supply, which happens every 10 ms which is what you are seeing. None of...
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    Diver300 replied to the thread Transient voltage issue.
    If you have more channels, use them. It can't hurt. Yes. Q2, it's base resistors and the capacitor also go. I meant to put a diode in...
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    Diver300 reacted to rjenkinsgb's post in the thread current driver is saturated problem with Like Like.
    PIDs are normally used in closed-loop systems; they allow the control to match the part being controlled by giving an approximate...
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    Diver300 replied to the thread Transient voltage issue.
    I think you've got the regulator drawn the wrong way round. I had an issue with regulators failing some time ago...
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    Diver300 reacted to Galgso's post in the thread Newbie Level-0 LED Question with Like Like.
    The figure you see quoted in datasheets is the maximum continous current the LED is rated to withstand without failing. The LED is...
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    Diver300 replied to the thread Latching relay for six STC- 1000 temperature controllers.
    I agree that you may need to suppress the contactor coils to prevent damage to the controller contacts. However a flywheel diode will...
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    Diver300 reacted to rjenkinsgb's post in the thread Newbie Level-0 LED Question with Like Like.
    LED are diodes. Normal LEDs do not conduct significantly below a specific voltage, but once that voltage is reached, trying to increase...
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    Diver300 replied to the thread Quick advice on remote car starter?.
    I suggest that you try a new car battery. When the engine cranks, the battery voltage will always drop quite a lot. The electronic parts...
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    Diver300 replied to the thread 12v battery, 18v magic.
    Cheap battery chargers will often have no smoothing capacitor. The peak voltage may be as much as 17 V but the average voltage will be...
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    Diver300 replied to the thread Fuel Auto Shutoff.
    Those are mechanical fuel pumps. They have the advantage of not needing electricity and no danger of feeding fuel if the engine isn't...
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