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  1. chopnhack

    I would like to have an LED timer made

    Let's clarify - you have posted this under Electronic Projects, but the title indicates that you want it made - are you intending to build it yourself or are you asking for a schematic to have someone else build it for you? Coin cell maybe possible if we stack four together, however, battery...
  2. chopnhack

    Aquarium canister water sensor fault

    Can W stand for the water heater element or the water sensor element?
  3. chopnhack

    Projects involving vintage CPUs

    Recycling is great and although they are all μ-processors, they won't function in the same way arduino's would. Arduino's are setup with on board memory designed to retain/execute code. CPU's from PC's execute code and do have some on die ram, but the majority of its retention is done off-die on...
  4. chopnhack

    I would like to have an LED timer made

    Can you give more information? Proposed voltage source, etc.?
  5. chopnhack

    From batteries to Wall power supply

    Casper, have you tried removing the two screws directly above the battery hatch? I am curious if the torch housing is screwed into the base. If removal of the screws allows the "innards" to come out, it might be easier to i.d. what is going on. As for dummy batteries, if you find out which two...
  6. chopnhack

    Christmas Gift for my 15 year old electronics enthusiast

    Good, I wasn't the first downer :p All kidding aside, +1. There are certain colors of LED's that I would advise to avoid as well as their wavelength could be dangerous too. Some of those purple LED's emit UV (without seeing the spec sheet to make sure they are safe, I would avoid them.) Also...
  7. chopnhack

    Resistance of Primary Winding of a Transformer

    I had to contact them to be sure of pricing because of vias, etc. I found them to be very competitive. There is a pic of the boards in my thread on designing a time delay circuit.
  8. chopnhack

    Resistance of Primary Winding of a Transformer

    No, its double sided. Shipping was $8 and change.
  9. chopnhack

    Resistance of Primary Winding of a Transformer

    $28.66 1.6mm, HASL, soldermask, 2 oz. copper, qty 10 of 10x10, 100% E-tested
  10. chopnhack

    Christmas Gift for my 15 year old electronics enthusiast

    Yes! That is a great start mom :) The stanley units are good quality and the lids tend to close better than the cheaper no name brands.
  11. chopnhack

    Resistance of Primary Winding of a Transformer

    I just had very good service from smart-prototyping in China. The board looks to be very good to my novice eyes. More on that when it gets in ;-) Very reasonable for a double sided 2oz. board.
  12. chopnhack

    Resistance of Primary Winding of a Transformer

    That's weird, look at post #11, for me it shows up as: *REMOVED* Colin Mitchell, Today at 7:43 PM Report
  13. chopnhack

    Resistance of Primary Winding of a Transformer

    Colin, thank you, but the linked material is just advertising. I think you may have inadvertently selected the wrong link. Thank you for taking the effort to find the section, I hope you can spare us another moment to fix the link! Thanks again :D
  14. chopnhack

    Resistance of Primary Winding of a Transformer

    Can we get a link to the website and a sticky to this explanation??
  15. chopnhack

    Resistance of Primary Winding of a Transformer

    Thanks Colin, off I go to search your site, many thanks :-)
  16. chopnhack

    From batteries to Wall power supply

    Agreed, I would still take the three AAA batteries and tape them together and use that as my source.
  17. chopnhack

    Buz103 replacement transistors

    No worries mate, I know when to step aside and call for help - I am still low on the skill front ;) As for the books, I did shelve them for a time. I am actively watching a series on modern electronics, about 12 hours of lecture. It is certainly very light so far, but I thought it was a better...
  18. chopnhack

    From batteries to Wall power supply

    You are not stupid, we are just trying to prevent damage to the device. That being said, if it is likely to damage the shell by trying to open it, the next logical step is to supply the prongs with 3 batteries in series and find out which terminals will be the ones we need to access. I would...
  19. chopnhack

    Buz103 replacement transistors

    Thanks mate ;) Trying to filter the easy stuff to pay my debt :D
  20. chopnhack

    Resistance of Primary Winding of a Transformer

    Is L assumed to be 1 henry? If so I get 376Ω as the primary reactance.
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