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  1. stspringer

    Explain why DMM reads 00.0 on negative side of circuit

    The circuit is not powered. I will try to explain it better. My circuit, the side with the short red jumper wire, going to the anode leg of the led, I am calling this the more positive side. My circuit, the side with the small black jumper wire feeding the other leg of the resistor to complete...
  2. stspringer

    Explain why DMM reads 00.0 on negative side of circuit

    No, it is not Powered :)
  3. stspringer

    Explain why DMM reads 00.0 on negative side of circuit

    No, it is not Powered Bob I learned that from you and others :)
  4. stspringer

    Explain why DMM reads 00.0 on negative side of circuit

    Thanks for your reply "LEDs don't have positive and negative legs." Yes they do. Positive is the anode negative is the cathode. https://www.westfloridacomponents.com/blog/led-basics-how-to-tell-which-lead-is-positive-or-negative/ My picture shows the negative leg of the led. I put the black...
  5. stspringer

    Explain why DMM reads 00.0 on negative side of circuit

    Hello All, Another question any help appreciated. Thanks in advance
  6. stspringer

    Please explain this resistance reading

    Yes, I was confused on the led part :)
  7. stspringer

    Please explain this resistance reading

    Thank you Very good explanation to wrap my head around.
  8. stspringer

    Please explain this resistance reading

    Good simple explanation thanks
  9. stspringer

    Please explain this resistance reading

    So Davenn please tell me the correct answer. Is it milli-ohm?
  10. stspringer

    Please explain this resistance reading

    I guess I am confused,as usual "A short is a 0 resistance connection between two terminals." So Bob, maybe you could tell me the correct answer? Is it milli-ohm?
  11. stspringer

    Please explain this resistance reading

    Thank you Sir, So what do you expect to learn by creating deliberate short-circuits? What have you learned so far? Please answer the following two questions, so we can see the extent of your understanding of short-circuits: (1) What is the minimum resistance necessary to constitute a...
  12. stspringer

    Please explain this resistance reading

    Hello hevans1944, Thank you for your reply. As a learning experience I wanted to learn "They may try to identify a short circuit" Thanks
  13. stspringer

    Please explain this resistance reading

    Dear Bluejets, I don't consider my post to Audioguru to be "nasty" "Don't think you are qualified to start judging peoples level of understanding or qualifications." I just pointed out that perhaps Audioguru was not reading my entire post. Sorry if I came on as being "nasty" I am an old...
  14. stspringer

    Please explain this resistance reading

    Sorry thanks for the previous post I must have forgot to respond to it. Sorry
  15. stspringer

    Please explain this resistance reading

    Dear sir I don't have a broken laptop motherboard. I am just asking general questions. I want to learn how to detect a short in a simple breadboard circuit using a dmm and find out which setting is best to use, ohm diode or continuity. I don't think you are getting the questions I am asking in...
  16. stspringer

    Please explain this resistance reading

    Thanks hevans1944 You explain things well. BEGIN UPDATE on this POST: I went to your link and see that is says set your meter to Diode mode. I did that and I got .000 volts whith the short "jumper wire" active, and OL with the short "jumper wire" inactive. I like these diode readings better...
  17. stspringer

    Please explain this resistance reading

    My meter is reading the resistor as 0.333K which is like you say 333 ohms. not clear on what you mean by Pictures #1 and #3 correctly show the 0.2 ohm and 0.3 ohm resistance of your meter's leads and wires and contacts on the breadboard. what about the reading on short_to_ground_1.jpg
  18. stspringer

    Please explain this resistance reading

    Ok here we go from scratch with schematic. Using a 330 ohm resistor. Using a DMM meter set to ohms. 12 volt Power off simple_battery_led_resistor_schematic_1.jpg shows schematic. 12_volt_led_resistor_circuit_1.jpg shows OL as expected, black negative probe on ground, red positive probe on...
  19. stspringer

    Please explain this resistance reading

    I have this circuit on a breadboard 9 volt battery 1 led 1 resistor sorry no schematic I am studying how to find a short a circuit With NO short created I get the following: With 9 volts power, to the breadboard, I put my DMM on the ohm setting and place the black probe on the negative power...
  20. stspringer

    Interesting circuit usb with 2 led lights with different brightness

    Can these mp's be purchased? Can we emulate this on a breadboard? Any schematics? Thanks
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