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Recent content by kam1787

  1. kam1787

    Voltage Divider Circuit for a Range

    For CONSTANT voltage you need a voltage regulator. Look at LDO regulators
  2. kam1787

    What resistor is this?

    1/2W to my eye but hard to tell in isolation, and no reference
  3. kam1787

    Type of Batteries I need

    AH is the amperes per hour rating that should be given with the battery specifications So we need the current [amperes] to say. You only gave the watts. If you give the voltage, then we can determine the current it uses, and then the AH
  4. kam1787

    Getting 65A off a PCB to another PCB

    Copy that................gold or silver plated nut & bolt
  5. kam1787

    turning relay on with small voltage change

    Sorry but I have no idea what you are talking about. You seem to have confused at least two different things within one 'question'
  6. kam1787

    A lightweight, simple Li-Ion charger for running off DC.

    I do not know your level of expertise but a common problem is making things much too complex. " What I'm struggling with is converting my 21V(24v psu with buck circuit) DC power supply into a current limited supply that can safely charge each cell at less than 1C, " Now I am very...
  7. kam1787

    [SOLVED] [moved] Logic & Latching Problem

    Re: Logic & Latching Problem I hate being such a twit, but would you have a practical [CMOS] circuit I could try?
  8. kam1787

    Conversion voltage - power

    In the most simple case P = V * I there are 3 unknowns, you need to know the values for 2 of them to determine the third that is simple algebra
  9. kam1787

    [SOLVED] Drop voltage in output of LM317

    Agree with the above. Drop the voltage 'properly' then feed an appropriate solid state device to control the motor
  10. kam1787

    using a logitech c615 webcam for distance measurement experiment

    One consideration is the response speed of a webcam............I doubt it is as fast as a photodiode You may have to adjust for the latency
  11. kam1787

    IoT, transfer "large" amount of data

    As I know BlueTooth is a LOW bandwidth protocol so the data goes from the 'device' to a phone then the server??? For that amount of data in that time frame, I do not see a wireless solution Standard WiFi would be unable to do it. How about compressing the data in the device, first?
  12. kam1787

    IC 4047 , What is the max current we could give to it?

    4047 .....more or less is a MV by itself it can NOT handle much current.....it NEEDS a supporting circuit https://electronics-diy.com/12v-dc-to-220v-100w-inverter-4047-irf540.php
  13. kam1787

    [SOLVED] [moved] Logic & Latching Problem

    Re: Logic & Latching Problem How would you describe it?! I have no other terms to describe it...............it should go high when input_1 goes high and stay high - - - Updated - - - You will have to walk me thru it................sorry but my brain seizes up when I try to walk thru...
  14. kam1787

    [SOLVED] [moved] Logic & Latching Problem

    Re: Logic & Latching Problem That is where I get lost................ The 1st thing that came to mind was a flip-flop which I know in vague conceptual terms, but not in real world terms http://hyperphysics.phy-astr.gsu.edu/hbase/electronic/norlatch.html#c1 But would it work as needed?
  15. kam1787

    [SOLVED] [moved] Logic & Latching Problem

    I need a [cheap and simple] latch [CMOS] to work as follows 1) two inputs, one output 2) upon a short logical high on input_1, output goes high and stays high Any other logic highs will make the output high 3) upon a short logical high on input_2, output goes low. Any other logic highs...
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