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  1. Tha fios agaibh

    What does your workshop / workbench look like?

    Thanks for the correction Steve. I was really just wondering if you had projects where you used that many scopes all at once. Forgive my ignorance here, but is a dynamic signal analyzer just a spectrum analyzer with additional features? Very impressive collection indeed.
  2. Tha fios agaibh

    Finishing touches on motion alarm

    I do apologize for me slow 'puter
  3. Tha fios agaibh

    Finishing touches on motion alarm

    Looks like you need a resistor from base to emitter to help switch off transistor. Sorry, I see this was already mentioned. (Posts didn't show on my end)
  4. Tha fios agaibh

    What does your workshop / workbench look like?

    Because some people have a budget. I can see two, or maybe three. But seven? Seems a bit superfluous.
  5. Tha fios agaibh

    What does your workshop / workbench look like?

    Very impressive Steve. May I ask why you need 7 scopes?
  6. Tha fios agaibh

    Ex4500S Honda Generator AVR Problem

    Sounds logical. I believe it's the board shaped like a kidney bean.
  7. Tha fios agaibh

    12v receptacle

    Yes, because Nema design specifically rates receptacle outlets for current, voltage, and system configuration. So, No you can't legally (or ethically) use a 120vac outlet for 12vdc. Externet made an excellent point. People will plug in anything that will fit into the receptacle and create a...
  8. Tha fios agaibh

    Motorcycle stop/turn/tail

    Thanks Dorke. @Chuck M: Yes, something likely that would work. You could use that or any off-delay timer circuit inserted just before the relay in my sketch. I'm not good at figuring the time duration, but I assume you'd need to lower the value of the 470k resistor to give you a shorter time...
  9. Tha fios agaibh

    Motorcycle stop/turn/tail

    You can do it with one relay if you use steering diodes. Also note blocking diode across relay coil. Stop and tail lights from left and right can be tied together. Forgive my sideways sketch.
  10. Tha fios agaibh

    Motorcycle stop/turn/tail

    For safety, I trust you have a bright brake light independent of the other tail and brake (stop) light. You could use a relay that would disable the tail (running) and brake (stop) wires every time the turn signal flashes. If you wanted to be a little more elaborate you could use P channel...
  11. Tha fios agaibh

    Battery charger questions

    I know it's more complex than the first question but; Anyone want to take a stab at Q2 and Q3?
  12. Tha fios agaibh

    massage chair model 948

    I would ask for a "service" manual.
  13. Tha fios agaibh

    Battery charger questions

    I don't know the model number off the top of my head but it's made by Lester and looks like this one. Yes, it's for lead acid battery use. I believe its max is 30amps. I understand the manufacture wanting to cover their arse, but it's a little frustrating to have to find a backdoor solution...
  14. Tha fios agaibh

    Battery charger questions

    Thanks for the explanations. Yes, I understand the relationship between voltage and current during the charging cycle and I agree there are certainly limitations of the battery. But, I have experienced this problem many times with this type chargers and the batteries almost always perform fine...
  15. Tha fios agaibh

    Battery charger questions

    I'm guessing it applies a high frequency to the battery and then measures the voltage and current response. Kind of like an Esr meter?
  16. Tha fios agaibh

    Battery charger questions

    They are not beyond recovery, just over discharged. I charge them with another type charger and once they climb a few volts higher the original charger works fine and they hold a charge as normal. Can you elaborate on the latter? How?
  17. Tha fios agaibh

    Battery charger questions

    Scenario 1: Someone asked me to repair a golf cart style battery charger. I found there was nothing wrong with the charger itself. The charger was not turning on because it didn't see its minimum cut-on voltage because the batteries were too dead. Q1:Why do they design a charger with a cut-on...
  18. Tha fios agaibh

    Hello

    Hello/Welcome
  19. Tha fios agaibh

    Drive A 5w Led

    The Chinese are horrible at instructions. I wouldn't trust the specs given. They could mean to use a700ma rated power supply instead of saying it has a forward current of 700ma? I would apply 6vdc and measure the actual current. I'm guessing your constant current driver went well above the...
  20. Tha fios agaibh

    9v battery draw

    You may have a blown fuse in the back of your meter.
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