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  1. (*steve*)

    Current source for a Capacimeter

    Look at image 3.1 here. The linear constant current driver that is used for a LED in this case can be used as a constant current load on a battery. You can include the LED if you want to, or select a resistor suited to the discharge voltage of the battery, or remove it completely. Make sure...
  2. (*steve*)

    ID 8-pin DIP

    It's likely to be some sort of offline switch mode controller. That board mostly appears to be a power supply. I think R6 may have been given a bit of a workout too.
  3. (*steve*)

    ID 8-pin DIP

    Yep, that looks like a catastrophic failure. You may have to find someone with an intact unit who can read the part number for you if there's no documentation available. It may be possible to reverse engineer the circuit to determine something about it, but that's not going to give you a part...
  4. (*steve*)

    ID 8-pin DIP

    Doesn't look melted to me. It looks to be covered with a conformal coating.
  5. (*steve*)

    Securing LED to heat sink?

    Those screws are probably way too small. The holes in the led module are about 3mm in diameter aren't they?
  6. (*steve*)

    Yonanas ice cream maker won't turn on

    Can you measure the resistance across the motor and let us know what it is?
  7. (*steve*)

    Securing LED to heat sink?

    The problem with adhesive is that when you want to remove the device you can't, and when you don't want it to release it does. If neither of these problems is significant, then it's a solution. I would recommend that you clamp it is place while the adhesive sets. You want to ensure the...
  8. (*steve*)

    High Side switching N mosfet

    There are leakage paths everywhere. It's not a question of IF, but of WHEN. As long as the MOSFET is regularly switched off, you won't have a problem.
  9. (*steve*)

    Hey, are you in Brizzie?

    Brizzie, Brisvagas, Brisneyland, capital of the sunshine state, beautiful one day perfect the next. Home of yorkies knob, bald knob, humpybong, little ugly creek, wonglepong, pimpinbudgie, Dickie beach, broken nose, pimple, deception bay, dismal swamp, and mount breast. The origin of such...
  10. (*steve*)

    High Side switching N mosfet

    The capacitor is charged when the mosfet is off. When you turn the mosfet on, the capacitor will start to slowly discharge, eventually it will discharge enough that the mosfet will begin to turn off. The final state is that the mosfet will have a Vds equal to the Vgs required to carry Id...
  11. (*steve*)

    Finding a piece like this?

    Or look on eevblog. Dave's had a few videos recently on designing your own LCD panel.
  12. (*steve*)

    High Side switching N mosfet

    Just watch out if you need to keep the MOSFET on for a long period.
  13. (*steve*)

    Hey, are you in Brizzie?

    You're an American, arn't you? :-D
  14. (*steve*)

    Hey, are you in Brizzie?

    If you're a banana bender (or live amongst them) and your calender isn't choc a block on wed 3/5 in the late arvo, come and have a coldie with me! I'll be staying near the state library and I have one night free.
  15. (*steve*)

    Help identifying component

    It might be a good idea to learn the safe way to connect jumper leads...
  16. (*steve*)

    Fast Switching Relay for High frequency Signals

    That's not really high frequency. A normal relay rated for sufficient voltage may be sufficient. There are also special relays made for RF use, but the may be overkill.
  17. (*steve*)

    Help identifying component

    I hope you will also fit fuses and/or circuit breakers.
  18. (*steve*)

    What circuit makes a HIGH by detecting LAST pulse

    A resistor to ground will do this for you. My reasoning is that you never know when the last pulse is going to come, so the output simply needs to stay low. I did consider the death of the universe as a triggering event for the output going high. Even ignoring the difficulty of detecting...
  19. (*steve*)

    100 milisecond delay circuite

    Up to :-)
  20. (*steve*)

    Samsung Syncmaster 740BF repair

    Yes, the rectifier diodes for the low voltage output. BD may refer to a ferrite bead. This is just a small lump of ferrite that is slipped over a piece of wire (or even a component lead) to provide a small amount of inductance. They will measure as a dead short.
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