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  1. chopnhack

    capacitor equivalent

    Does it look anything like the second picture? It's X2 rated, higher than the voltage of the original, so you are good there and they sell the capacitance in the range you are looking for. http://www.ttiinc.com/object/kemet_film_X2_pme Aside from calling TTI for a replacement, you can also see...
  2. chopnhack

    Electronic supply, help.

    Huh? You are hard to read sometimes Colin - are you being facetious? If you have the best invention in the world - you don't need E-Bay. For instance, arguably, Apple has produced several "best" in the world and they don't sell them through E-Bay, instead they have their own portal the Apple...
  3. chopnhack

    Electronic supply, help.

    I wouldn't dismiss Ivy outright - he may have something novel that will market to a select group and may have good sales. Whether that turns into a successful venture is controlled by so many factors. I agree with Gyrd and Colin - find the best pricing on your components and include in all your...
  4. chopnhack

    Electronic supply, help.

    I don't think Gyrd3 was being cheeky, he was just wondering if you found us, how could you not have found a supplier instead. edit: digikey has been my goto as well - very good customer service and very fast shipping. You will love doing business with them.
  5. chopnhack

    Electronic supply, help.

    Hate to send work overseas, but if you are to be mass producing these for sale you may want to prototype one, verify that all is as you wish then contract with a factory in china. That is where the majority of boards and electronics goods are produced to my knowledge.
  6. chopnhack

    Electronics Project Help!

    I would suggest wheels, carrying this around will not be fun as you will probably need the car battery or two to feed an amp! The solar panel is a great idea, but you will need a fair sized one to recharge your battery. Perhaps you should leave that as phase two of the project and focus first on...
  7. chopnhack

    More efficient LDR "dark" switch?

    I'll have to give that another go - as I recall, I had followed Colin's direction to troubleshoot the circuit and with the first transistor going to +3v as he mentioned. We noticed the LED was brighter and measured 2mA. This was with the LDR removed from the circuit.
  8. chopnhack

    C program .cpp file encryption

    Absolutely :-)
  9. chopnhack

    C program .cpp file encryption

    Isn't this done naturally when the file is compiled and turned into an executable file? I had the misfortune of misplacing my source code on a small program I wrote some time ago and only had the exe file - I was told that it was nearly impossible to reverse engineer it. I am not sure on the...
  10. chopnhack

    More efficient LDR "dark" switch?

    You seem to be reasonable stocked with components, maybe you have a LM317 handy? You can couple that to your existing 7805? and re regulate down to 3v. Beats batteries IMHO. Yes, that website had a lot of neat toys. Pricey, but I bet they are extremely well made and should last a lifetime...
  11. chopnhack

    More efficient LDR "dark" switch?

    Cool! We are along similar thoughts again :) I was reviewing the datasheet last night, nearly 200 pages! Daunting. You are right in what you said earlier, half the battle is knowing what you need to address and setup first. I wish microchip had better documentation, especially for non engineers...
  12. chopnhack

    I've been tagged

    Hey, you never know, better to apologize for any perceived insult - I really appreciate all the help and who knows, maybe he was offended. Its all good!
  13. chopnhack

    Happy Fathers Day!

    To all who celebrate! I received the traditional tie - well needed. I got dad a cordless tool set, his old one is from the stone age, very heavy and still had nicad batteries! How about you?
  14. chopnhack

    More efficient LDR "dark" switch?

    Oh, I think I found a suitable chip - PIC10LF320T The L stands for Low voltage I believe as this unit functions down to 1.8v - I think that this is an important feature - the program can run longer on the battery before it runs down. Another cool feature is the draw, much lower than the 0f200...
  15. chopnhack

    I've been tagged

    Oh, sorry Harald, didn't mean to annoy you! I just wanted to draw your attention to the thread since you had provided similar assistance in the past. Thank you for your previous contributions!
  16. chopnhack

    More efficient LDR "dark" switch?

    That is interesting - I thought analog were more robust than digital! I know that analog is more "noisy", but I thought it was digital that suffered from the noise where analog ignored it until it passed a certain threshold. Very different perspective, thanks! I would prefer to stay at one...
  17. chopnhack

    More efficient LDR "dark" switch?

    The battery measured 2.96v. I just rechecked it and it says 3.03v So mystery solved! Thanks for the walkthrough and analysis. There is simply not enough current being provided at the voltage available to drive the circuit. Strange as I thought the whole purpose of the transistor was to amplify...
  18. chopnhack

    More efficient LDR "dark" switch?

    2.96v I am actually using a 220Ω resistor. I didnt want to disturb the other circuit and figured it was close enough. 128mV at resistor, 2.798v at LED, 637mV at CE junction. This doesn't add up to the terminal voltage of the battery - its higher at 3.563v so either the meter is not very good...
  19. chopnhack

    More efficient LDR "dark" switch?

    I am back.... Both Q's (2n3904's) give 0.5mA when separated and tested individually. Interestingly they also give the same result when wired backwards!! I fished two fresh ones out of the bucket - each tested as 340 hfe. They each acted accordingly, forwards and back giving 0.5mA to the LED as...
  20. chopnhack

    More efficient LDR "dark" switch?

    Thanks in advance for all the help and extremely detailed analysis. I have to cook dinner, but I will back in a few hours to pursue this!
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