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  1. AnalogKid

    Synchronized problem

    No. This can be done with one dual-flipflop and a couple of gates. What is the part number or model number of the camera? Can you post a datasheet that shows what the output signal is? Is it a pulse or a level change, pulse duration, voltage, etc? What does the output of device A go to...
  2. AnalogKid

    Synchronized problem

    Much better. Is it your intent to have device A examine the content of the two camera outputs to determine that they have the same image, or examine the camera trigger signals. Examining video or digital still images to see if they are "equal" is a difficult software task. Examining trigger...
  3. AnalogKid

    Synchronized problem

    Based on nothing but the information you have provided, "A" is simply a piece of wire between the output and input 2. I think you need to provide a better description of your question. Are you asking about a video switcher? Why is there feedback from the projector to both cameras? Is that an...
  4. AnalogKid

    How to create multiple simultaneous signal sources from a single reference source?

    Suggest you look into DDS - Direct Digital Synthesis. There are low-cost modules available on ebay. ak
  5. AnalogKid

    Fence flasher

    Ignoring the LEDs for a moment, 10 kV across 4.4K equals over 22 thousand watts. Most fence chargers make a pulsed output, so the average power is much less, but clearly it is much greater than the 10 W combined rating of your resistors. That kind of peak power can cause resistors to blow like...
  6. AnalogKid

    Fence flasher

    The LEDs should be in series, not in parallel. ak
  7. AnalogKid

    Adding motor into simple circuit

    Bigger batteries, or separate batteries for the motor and a second reed switch close enough to the first one to be operated by the same magnet. What information do you have about the motor - voltage, current, power, etc? ak
  8. AnalogKid

    LM2596

    Many switching regulators have a minimum load current requirement. For a 3 A part, it might want to see at least 300 mA of load current to form a stable output. ak
  9. AnalogKid

    Series Voltage regulator.

    Disagree. By keeping the zener firmly biased into its operating region, it sharpens the regulator's response curve. Without it, the zener diode's "knee" adds to the TR2 Vbe knee to make for pretty soft regulation, increasing the load regulation error. ak
  10. AnalogKid

    Series Voltage regulator.

    Do you need to work out the design equations, or actual resistor values? For values, you need to start with the output voltage adjustment range and the max allowed output current. Also, is Dz1 specified, or is it to be an element in the equations? ak
  11. AnalogKid

    Diode choice

    The answer is that the parts and the datasheets were different 50 years ago. That one manufacturer chooses to specify the parts differently today does not mean all manufacturers do. Also, for things like Vf, the datasheet lists max values. But there is nothing that says the various voltage...
  12. AnalogKid

    Diode choice

    Back when the line was invented, the process difference between 50 V and 1000 V diodes was enough to affect the price. Also, the higher voltage diode has a slightly higher forward conduction voltage Vf, higher junction capacitance, and a slower switching speed, so it is less efficient in low...
  13. AnalogKid

    An alternative to 74ls173's design ?

    The first circuit and your version work the same only for certain combinations of input signals. In your circuit, if the load input changes while the clock input is high, the ff is clocked immediately. In the original circuit, the ff is not clocked immediately, it is clocked on the next...
  14. AnalogKid

    Small print

    "Reading glasses" come in several strengths, off-the-shelf at drug stores, Walmart, etc. For me, 2.5 or 3.0 diopter is a good compromise between magnification and depth of field. For detailed work, I have a 10x loupe. ak
  15. AnalogKid

    Successful Stanford Research SR530 lock-in amplifier repair

    Speaking of what breed is that? Looks a bit like a Cav. ak
  16. AnalogKid

    Microphone advise for monitoring heart sounds in animals under anesthesia

    50 Hz seems way too high. My dog's heart rate is around 100-110 once she calms down at the Vet's. That's under 2 Hz. Separate from that, what is the inside diameter of the tube? You probably can improve coupling of the acoustic energy in the tube into a microphone if a small microphone...
  17. AnalogKid

    Visible light

    I wasn't addressing differences in the radiation, only my interpretation of the OP's original question about the generation of the radiation. If you (or the crazies at NIST) build a sinewave oscillator circuit that oscillates at the frequency of green, will you see green? ak
  18. AnalogKid

    Visible light

    Apples and oranges. In terms of the source of the visible light, thermal radiation from a DC-heated resistor is not the same as an RF oscillator connected to an antenna. His question is whether or not the results of the two would be the same. ak
  19. AnalogKid

    Visible light

    A single wavelength would be less than 1 um long, but an antenna could be any length you want, such as a (large) integral number of wavelengths. ak
  20. AnalogKid

    Pulse dropping circuit.

    Side note - here in EE land, "current" has a different meaning... ak
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