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Recent content by DanLew

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    Eliminating 6kHz to power a small fan

    I am trying to vary the speed of a small computer fan (30mm, 5VDC, brushless) with the output from a small digital electronic speed control. It has an output frequency of 6kHz (per the guy who made it). The fan does not run. Is there a simpe way to use that output to make the fan speed...
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    6-9 VDC, 1A max. Oscillator Circuit needed

    I need a simple circuit to take a range of 6-8.5 volts from a NiMH battery pack and add "buzz" to it. I don't even know the frequency I want, but I'm guessing maybe anything from a hundred to 1Khz would work. Accuracy, stability, etc not important - just need to add buzz. Variablefrquency...
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    Zener circuit help please

    Ian, Thank you. I tried the circuit and it works perfectly. I usd a 0-500 pot to zero in on a desired fan idle speed. Ended up using a 47ohm ressitor. Great. Thanks again.
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    Zener circuit help please

    Ian, Thank you! I'm amazed that the circuit will work, that the help came so fast and that you provided all the specs and the calc's. Thanks again - really helped me out . Best regards, Dan
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    Zener circuit help please

    It is the motor, but it shows leads coming from the motor. There are power leads going to the motor that supply 0 to about 7.8VDC, reversing polarity to run the motor in either direction. The leads shown tap off the terminals to supply power to the circuit shown. All of this is run from the...
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    Zener circuit help please

    Will this work? If it will, wha are the zener and R1 values please? If it won't work, what will?

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