Search results

Search Forums New Posts
  1. (*steve*)

    Replace MOSFET AO4433 With FDS6679

    If you're going to post in multiple places, it would be useful to post a link to your other posts, or at least mention the fact. It means that people don't duplicate effort, and you don't have to read the same stuff twice. My preference is that you pick one place and don't post elsewhere...
  2. (*steve*)

    Help: LED Visor Light Bar, audible high pitch noise.

    The end is probably coming from a switch mode regulator or similar. Typically these are operated at frequencies far higher than those which are audible. I would complain until I got my money back. In my country there are consumer guarantees that I would rely on to get my money back.
  3. (*steve*)

    Does anyone know the value of this resistor?

    Do you still have whatever it was connected to?
  4. (*steve*)

    Soldering queries

    Hi Jonathan. Welcome to Electronics Point. If we can help fix your problem, that (weirdly enough) is payment enough for most of us. Generally speaking this is caused by too much heat applied for too long. Some older (and even some not-so-old) boards are highly subject to this because the...
  5. (*steve*)

    Does anyone know the value of this resistor?

    It could also be a 1uH inductor (brown black blank silver). Was there a designation on the board (L12, R543, or maybe F2 -- it's the first letter that is important)?
  6. (*steve*)

    Source for replacement resisters

    If you want higher accuracy, start with an 8.66Ω resistor, measure it's actual resistance accurately and calculate the required parallel resistance to bring it down to 8.5Ω The benefit of this method is that the tolerance of the much higher value parallel resistor will have relatively little...
  7. (*steve*)

    Source for replacement resisters

    Digikey as 16.9Ω 1% resistors. You can place two of these in parallel to get 8.45Ω. You can also use this site to calculate resistors that can be placed in series and parallel to get a specific value. That tells you that a 16.5Ω and a 17.4Ω resistor in parallel will yield 8.469Ω, a value...
  8. (*steve*)

    PirSensor

    Check out this site which explains the use of this module. Most importantly, this site identifies the IC used in this module. It is the BISS0001. Googling "BISS0001 datasheet" will take you to a number of sources for the datasheet. It looks to me that changing the minimum resistance...
  9. (*steve*)

    GY6 AC/DC Reg/Rect - Are Both DC and AC regulated or just AC?

    Any load greater than that which can be provided for by your magneto will come from the battery. The battery will be recharged when the load reduces so the magneto has spare capacity.
  10. (*steve*)

    Capture infinite loop by consistently monitoring current consumption

    Assuming someone else doesn't beat you to it. (US is a "first to file" jurisdiction isn't it?)
  11. (*steve*)

    Geriatric and forgetful

    Don't discard the tile option to quickly. Whilst that are a little expensive (the batteries are intentionally irreplaceable) you will get an alert when the item is "found". On a property that is rarely visited by other tile owners, it will tell you when you get close to it again, and it will...
  12. (*steve*)

    GY6 AC/DC Reg/Rect - Are Both DC and AC regulated or just AC?

    I would say 12V and DC. Why you would use one for a headlight is beyond me
  13. (*steve*)

    Connect 12V LEDs to 2 12V car deep cycle batteries

    Yes, for safety I would always insert a fuse.
  14. (*steve*)

    PirSensor

    I assume it's a PIR module. Figure out what chip is used, look up the datasheet, figure out the circuit, and maybe you'll be able to see what to change to alert the delay.
  15. (*steve*)

    GY6 AC/DC Reg/Rect - Are Both DC and AC regulated or just AC?

    I'm not familiar with gy6 regulator rectifiers. Do you have a link?
  16. (*steve*)

    Variable current power supply with varying duty cycle

    An LM317 is not going to do the job for you. It has a maximum input voltage less than your choice of output voltage (let alone the higher input voltage which would probably have to be 50V or so). In addition, an LM317 had a maximum output current of 1A. Even if you found a 5A adjustable...
  17. (*steve*)

    Thyristor as a triac

    You will require a different polarity signal to turn on one scr vs the other. (I.e. in a single, but different quadrant for each). In contrast, triacs can often be triggered in 4 quadrants.
  18. (*steve*)

    Connect 12V LEDs to 2 12V car deep cycle batteries

    There remote control is probably powered by a single 3V coin cell. Powering it from 12 or 24 volts would probably result in some amount of smoke. Some larger remotes are powered by a single small 12v battery, but spikes that exist in a car electrical system could damage them if they were...
  19. (*steve*)

    CD Player Won't read disc

    Take a careful look at the lens (as stated above) and see what happens when it tries to read a disc. Many times, simply leaving the cover off will let you see all you need. If cleaning the lens doesn't work, you may see the disc speeding up and slowing down, and the head moving back and forth...
  20. (*steve*)

    Connect 12V LEDs to 2 12V car deep cycle batteries

    That looks pretty good. I think the joined red and black wires on the battery side are just from the church and paste you did, and that you wouldn't wire then up (they don't go anywhere anyway. I'm sure you can connect all 4 strips to the one controller if you want them to all be controlled...
Top