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  1. CDRIVE

    Simply relay circuit - help please

    I think that famous quote from Struther Martin said it best. :rolleyes: On the up side this failure to communicate doesn't come close to this unrelated topic. https://www.electronicspoint.com/flashing-5watt-led-t256005p10.html#post1525837 Chris
  2. CDRIVE

    Simply relay circuit - help please

    Is this the first time we're hearing that the fan is a 12V model? Chris
  3. CDRIVE

    Flashing 5watt led?

    I drew a schematic for you and it includes all pertinent notes. It is obviously NOT the same as your original circuit. This circuit should be built on a PCB with the exception of the battery pack and possibly the power switch. The LEDs can but don't have to be mounted on the PCB. It depends...
  4. CDRIVE

    Flashing 5watt led?

    What in the world are you talking about? Are planning to use bailing wire??? Chris
  5. CDRIVE

    Flashing 5watt led?

    No it's a 10 Ohm resistor. Chris
  6. CDRIVE

    Simply relay circuit - help please

    My point is If the port deliverers 5V (PWM) then the LED would always light. Then you can connected the 5V fan directly to the port. No need for the transistor. Chris
  7. CDRIVE

    Simply relay circuit - help please

    Are you sure you understood what my little test circuit was for?
  8. CDRIVE

    Simply relay circuit - help please

    Ha, I must have experienced a brief moment of cogent thought. I've been suffering with a nasty case of Snowbird Flu. Chris
  9. CDRIVE

    Help analyzing this simple circuit?

    Well, whoever designed it knew the logic. We don't include components merely to fill PCB real estate. :D Chris
  10. CDRIVE

    Simply relay circuit - help please

    If you don't have a scope you can build this simple circuit to test if the voltage is actually Pulse Width Modulated 5V. If the voltage is actually only 3V the LED won't light. Or if your DVM has a Frequency function you can use that.instead. Chris
  11. CDRIVE

    The control circuit in the engine speed and reverse

    Once again I get blindsided by a case of the stupids! Chris
  12. CDRIVE

    Help analyzing this simple circuit?

    The circuit appears to be an oscillator / driver. The oval object is a quarts crystal, which appears to be cut for 16KHz but its small size surprises me. I would expect a low freq crystal to be larger than that. Removing the 220uF Cap will not make it work better. If the resistor reads Brown -...
  13. CDRIVE

    The control circuit in the engine speed and reverse

    I know there's a question in here somewhere but it escapes me. Chris
  14. CDRIVE

    Increasing output of fixed V-Reg

    Yes, like that. Cathode connected to circuit GND and the Anode connected to regulator GND pin. Chris
  15. CDRIVE

    Increasing output of fixed V-Reg

    Dave, I've been inserting a diode or two in the GND lead of fixed regulators (as Duke described ) for years with no problems. Chris
  16. CDRIVE

    Confused by electricity!!

    Does seeing it drawn like this help you? Chris
  17. CDRIVE

    Flashing 5watt led?

    Your quite welcome. Please keep us posted on your progress. By the way, I'm expecting this to run quite cool because the pulse width is so short. It'll extend your battery life too. Chris
  18. CDRIVE

    Flashing 5watt led?

    Here's and updated schematic and a transit plot of the LED current. Chris
  19. CDRIVE

    Flashing 5watt led?

    Since I'd like to keep this as basic as possible for you I think it would be best to not deal with a puck at this time. I'm redrawing the schematic for you. Have you selected a power switch for it yet? A miniature toggle or a push on push off (none momentary) switch will be fine. The push on/off...
  20. CDRIVE

    Relaxation oscillator Noob need education

    As an HSM novelty project it looks like fun. Practical and or efficient? Ehhh not so much! ;) Chris
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