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  1. chopnhack

    HI

    Welcome John! Great site full of extremely knowledgeable chaps who are always willing to help. You have chosen wisely ;)
  2. chopnhack

    Designing a Time Delayed Relay

    So I got pictures and they look great except for the via's being left untented. I foresee some difficulty with soldering possibly. I am quite surprised that they were left open like that! Otherwise I think they look pretty good! Should I ask them to tent or just ship as is?
  3. chopnhack

    Converting a projector from incandescent to solid state?

    Indeed, I had suggested to my father http://www.scancafe.com/ But I haven't heard back so I figured I would investigate my possibilities. Thanks guys!
  4. chopnhack

    Converting a projector from incandescent to solid state?

    Excellent point steve! The tip of the bulb is frosted at its top, presumably to get more light to exit around the middle. I don't know what the compartment looks like, but I would imagine that its lined with reflectors of some sort. Why do you think it would only need to be operated at 1/2...
  5. chopnhack

    Converting a projector from incandescent to solid state?

    My parents have unearthed an old 35mm slide projector along with literally thousands of slides. After watching a few hours, the bulb of course blew the next day when they went to view some more. They asked me to find a replacement bulb which I did, but at some outrageous prices. New bulbs ~$56...
  6. chopnhack

    Designing a Time Delayed Relay

    Submitted last friday, was informed today that the board would be shipping out today or tomorrow! I asked them to check with me before production, but they skipped that part!! I am a little concerned with silkscreen running over to solder masked areas... I asked for them to send me a picture of...
  7. chopnhack

    Christmas Gift for my 15 year old electronics enthusiast

    As for organization, I can highly recommend a Plano style box - one of the best ways for organizing the myriad of small parts required for this hobby. http://www.amazon.com/gp/product/B000E3FKTE/ the current price is not the best, I bought mine for $25. They do make bigger units, but they are...
  8. chopnhack

    From batteries to Wall power supply

    Good point Bob. Casper, can you give us a pic of the door contacts?
  9. chopnhack

    From batteries to Wall power supply

    Does the contact connect all three batteries? If so, then I would assume that the device requires 4.5vdc. I don't quite understand what the teacher is saying, using different power from each battery?? If the contact connects all three, then you only have to worry about providing a clean source...
  10. chopnhack

    Designing a Time Delayed Relay

    Hey, not bad! The company only wanted one change to the file I submitted!! They wanted the outline in a separate file called .GML. I wonder if that was just the first round of eyeballing o_O:) We shall see.
  11. chopnhack

    Capacitive Reactance Circuit

    Ended up using a 180Ω resistor, limited current to 17.5mA. Works great, thanks Krisl! Thanks all!
  12. chopnhack

    From batteries to Wall power supply

    I noticed that too, maybe Casper removed it for a better view? @Casper Christensen - how does the center battery make contact with the outer two?
  13. chopnhack

    Designing a Time Delayed Relay

    I just found the capacitor to solder on to the backside - 0603 size... holy cow that is small! The bent lead transistor worked out fine, just had to reorient it on the board. File away!
  14. chopnhack

    Designing a Time Delayed Relay

    Ok, all looks good for layout. I am going to create the files and send them off.
  15. chopnhack

    Capacitive Reactance Circuit

    Great idea! Thanks :-) I will tear it apart tomorrow and fix.
  16. chopnhack

    Designing a Time Delayed Relay

    Parts came in today :D - the transistor was a different form factor than expected, I have to redo a small section of the pcb. The transistor came with cranked legs? Basically the three legs are in line with each other, but the outer ones look like they have a ~22.5 deg bend towards the outside.
  17. chopnhack

    Capacitive Reactance Circuit

    Thanks Kris, that makes more sense. I didn't realize until you said that. So, power consumed by the switcher would not be seen when I used my meter, because it was happening on the other side of the transformer! Makes sense. Worked out well until I fiddled with the potentiometer to adjust the...
  18. chopnhack

    Capacitive Reactance Circuit

    Edit: Ignore my drivel above.. Simple circuit = cell phone charger + 500Ω pot = constant current supply If it's simple, I will make it needlessly complex :p The only question that remains in my mind is how efficient is this supply? Am I losing a lot of power in the adapter or is this simply...
  19. chopnhack

    MIC Voice Control LED Melody Lamp

    Nicely done Jack! One of my favorite's from Akon as well :D Wouldn't it be cool, if they had a few more LED's interspersed that reacted at different frequencies? That would be a neat hack.
  20. chopnhack

    Capacitive Reactance Circuit

    I got around to plugging this thing into mains today and boy, it buzzes like a hornet's nest!! It is certainly not suitable for its intended application (bedroom devotional light). The device stays lit until the LED burns out/supply fails whichever is first. With all this talk of cell phone...
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