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  1. (*steve*)

    Reading value from Solar Panel Cell, current peak concern

    It's ok. You're not trying to measure power or something like that.
  2. (*steve*)

    Reading value from Solar Panel Cell, current peak concern

    That's fine, but the voltage you read from a solar panel will reach a maximum well before you get to a level of illumination where the power available from the panel reaches it's nominal rating.
  3. (*steve*)

    What is your troubleshooting sequence?

    It depends on the symptoms. If it's totally dead with no obvious faults, I'd check: Fuse Power rails present AC power available at fuse (if no power rails) Power rails in spec (if power rails present) From there, you might start looking at common faults, before trying a more systematic...
  4. (*steve*)

    Reading value from Solar Panel Cell, current peak concern

    I think you're right, but what are you trying to do? I'm curious as to why you're reading the voltage on a solar panel (not a criticism).
  5. (*steve*)

    Should I apply pressure occasionally to a burger when I'm cooking it?

    Are you going for an ISO standard maillard reaction? You should know that "sealing" the meat is a fallacy. When you heat meat enough to get a maillard reaction, the proteins tighten up and effectively squeeze liquid out from the meat. Minced meat has exposed more surface area, and this will...
  6. (*steve*)

    Cheap 3-Axis Mills

    Exactly. The cost for me to produce a single PCB on a laser cutter way exceeds the cost of getting a real one from China, but I can go from concept to prototype in a day. I'm pretty sure these milling machine would be faster because I just use the laser to get a resist pattern on the board.
  7. (*steve*)

    Solar charging module for LiFePO4 batteries

    LiFePO4 is at the cheaper end of the lithium battery technologies. It suffers from slightly lower capacity, and a fairly significantly lower voltage. However it has a much more benign failure mode (smoke vs fire). I have mentioned my colleagues sprinkler valve controllers before. These have...
  8. (*steve*)

    For Sale: Chips and resistors

    I'd look up each part on digikey, find the price per unit in 100 qty for the cheapest variant and ask about 5 times that for a qty of 10 on eBay. Postage will add to the price for your customers, and eBay's fees will cut into your price. What is your time worth? The hard part is finding...
  9. (*steve*)

    Need help with a component.

    Ok, even more likely then. A small MOSFET can easily do the PWM signal required for them. Replacing it with a 2N7002 seems reasonable. What voltage is the fan? There is a chance that when the MOSFET shorted (common failure mode) this voltage was fed into the logic controlling the fan with...
  10. (*steve*)

    Need help with a component.

    I presume it's a 2 wire fan and that it runs at variable speed on this card? It's almost certainly a MOSFET. Can you use your multimeter to determine if the positive or negative lead of the fan is directly connected to the MOSFET. (My guess is the negative lead connects to the pin that's on...
  11. (*steve*)

    Need help with a component.

    Sounds like it could be a MOSFET. Can you tell us what you did to damage it. This may give us some additional information.
  12. (*steve*)

    Faulty 9VDC Power Supplies

    Look for 330μF 16V 105C, low ESR. The other important criteria is size -- make sure it will fit. Low ESR capacitors tend to be a little larger for their capacitance, but the size for a given capacitance gets smaller and smaller as technology progresses. Higher capacitance (say 470μF -- a...
  13. (*steve*)

    What does your workshop / workbench look like?

    Yeah, workshops grow to 125% fill the space available as soon as you start using them. I've struggled with parts in neat tidy drawers because I simply don't have the room, and they tend to be very space inefficient. I've taken the approach that if I'm going to have parts in boxes to scrabble...
  14. (*steve*)

    Servos

    Maybe it's not getting enough power. How are you powering both of these servos? Is it from the 5V from the Arduino? If so, are you powering the Arduino from a higher voltage source? The best option may be to use a separate, high power power supply for the servos which is connected to have a...
  15. (*steve*)

    Legality of non-amateur band receivers

    Maybe... It depends where you are. Do our British colleagues still require a licence to listen to broadcast AM radio?
  16. (*steve*)

    H2482

    It's possibly a Hutson industries 300V, 6A triac. Is this a late 70's, possibly early 80's piece of equipment? Peak current of 80A and a required gate current of <50mA are probably the other key specifications. An old datasheet is here.
  17. (*steve*)

    H2482

    What package? And what is the application?
  18. (*steve*)

    APOLOGIES TO THE GROUP

    The teenage notion that all caps are shouting is somewhat similar to the teenage notion that paragraphs are an aid to comprehension.
  19. (*steve*)

    APOLOGIES TO THE GROUP

    Please try not to post in all caps. You realise that an HHO generator will consume more energy than is released when burning the hydrogen, right? (read my sig)
  20. (*steve*)

    Help in deciding method for de-modulating? a signal to extract one frequency!

    Finally an application for electronic bagpipes that doesn't pretend to be about music!
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