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  1. CDRIVE

    I want to start manufacturing my own line of CCTV Cameras

    The term "Water Proof" means different things to different people. As an old scuba diver water proof meant good to 300 meters. This is the depth my old dive watch was guaranteed to. No, I've never been below 175 feet. :D As others have said, you seem to be engineering this backward.
  2. CDRIVE

    Chronograph for bullets

    Yes, of course.
  3. CDRIVE

    How to connect LEDs in series

    I replaced all the outlets and switches in my shop with hospital grade 20A Hubble's and Leviton's. Whenever we did a remodel at the hospital they would replace all the receptacles and switches but they never found there way to the dumpster. :D The kick is we would do a room remodel every year or...
  4. CDRIVE

    How to connect LEDs in series

    I had no idea that large blade = neutral small blade = hot was such a tuffy to remember. :rolleyes: Damn, the population has become even dumber than I thought! :D Chris
  5. CDRIVE

    How to connect LEDs in series

    Though it's an interesting approach (for the experienced) I totally understand your reluctance, Good point about the plug but there are the polarized 2 blade versions. ;)
  6. CDRIVE

    Chronograph for bullets

    Keep in mind that hams work with some extremely high frequencies. For your 10MHz clock you should be able to get by with copper clad bread board. http://www.radioshack.com/family/index.jsp?categoryId=2032265&utm_campaign=Category_CMS&utm_medium=RSCOM&utm_source=CAT&utm_content=CT2032230 You...
  7. CDRIVE

    How to connect LEDs in series

    It would be nice to make this a sticky, though I'm bewildered as to why he put the fuse in the neutral leg. ;) Chris
  8. CDRIVE

    Chronograph for bullets

    No, I didn't mean SMT. I was referring to the tendency that many of us have when test tacking components to see how a value works out. At these frequencies the leads must be cut short. Yes, very happy the foil worked. Yes, I love uCs, especially Picaxe. However, If I were doing this...
  9. CDRIVE

    Problems substituting a relay

    What happened here is the thread began with replacing the 24V relay with a 12V model. I think these are all my schematics and plots but no post to give them context. As shown, I did plot one with a 2.2uF cap and another with an increased zener voltage. The 12V - 24V issue yucked them all up...
  10. CDRIVE

    Problems substituting a relay

    I could have sworn that I did. Might be that senility thing creeping up on me. I'll check again but it's going to be a long journey back. ;) Chris
  11. CDRIVE

    Political argument (Yeah, this is going to end well)

    I started this thread, yet I've been conspicuously AWOL throughout most of it. I guess it just dredged up too many painful memories. Most of us, that God blessed with returning home alive and with all our parts found the battle at home far worse than in country. How many of us were constantly...
  12. CDRIVE

    invention/adapter

    What you're describing is integral to the device plugged into the receptacle, not the receptacle itself. Regarding the GFI.. I don't have the energy or desire to search out U.S. or foreign standards regarding trip current. I believe it's much lower here than you state.
  13. CDRIVE

    Chronograph for bullets

    Yes, it's a bummer but it is what it is. Even on a copper board you can't experiment with component values with lead lengths as they come out of the package.
  14. CDRIVE

    555 timer reverse polarity circuit

    I've updated the schematic to indicate parts list. In the event that you don't want to power it from a 12V wallwart I've also added a 7812 voltage regulator.to the circuit. This will enable you to power it from the +30V leg of your supply. I would not recommend using Electrobrains Zener design...
  15. CDRIVE

    Chronograph for bullets

    Speaking of Protoboards. Are you testing the 10MHz osc. on the protoboard? Not a good idea.. As handy as they are they present quite a bit of capacitive coupling to adjacent conductors. Working with HF requires adherence to accepted techniques. This excludes long and parallel conductors...
  16. CDRIVE

    invention/adapter

    You do realize that this is going to trip GFIs? https://www.electronicspoint.com/attachments/5097d1344108890-invention-adapter-powerpolarityindicator.jpg Besides that, and I've said it before, but perhaps differently... It will NEVER be approved, with maybe the exception of third world...
  17. CDRIVE

    invention/adapter

    Then you haven't looked very hard.
  18. CDRIVE

    Problems substituting a relay

    Perhaps it's been long forgotten but I posted a number of schematics, simulations and plots that clearly showed the results of modifying said components. Currently, this part of the thread is a re-hash of what's already been covered waaay back. Chris
  19. CDRIVE

    Chronograph for bullets

    You were instructed correctly. Have you ever noticed that scope sales literature usually state "Supplied with 10:1 low capacitance probes"? This because a 10x probe also greatly reduces capacitive loading by the scope too. A typical scope will have an input resistance of 1Meg paralleled by ~...
  20. CDRIVE

    Basic dark activated circuit with LDR help.

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