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  1. CDRIVE

    Chronograph for bullets

    Always use a 10:1 low capacitance probe whenever you can.
  2. CDRIVE

    MOSFET IRF540A circuit.

    Keep us posted. Good luck, Chris
  3. CDRIVE

    Electronic timer with rest (bells and whistle)

    You can learn micro's and programming the easy way here... http://www.picaxe.com/
  4. CDRIVE

    Chronograph for bullets

    Please post the schematic. Needing to do what you're describing usually indicates that you need capacitance somewhere or need more feedback. One can be related to the other. EDIT: I'm not referring to Vcc filter caps. I'm referring to pF values in the Osc.
  5. CDRIVE

    555 timer reverse polarity circuit

    Hi Chris, Just so you know.. Electrolytics are typically +-20%. The larger they are (capacitance) the more leaky they are. The first few time cycle will probably be longer than subsequent cycles because the cap will be forming itself and also because of the nature of the 555, After the first...
  6. CDRIVE

    Could anyone just take a look?

    Let's get real here. The only category that this could possibly fall under is "Pirate Radio".
  7. CDRIVE

    Could anyone just take a look?

    I have an amateur radio license and I also have a commercial radio telephone license. Neither gives me license to transmit on the commercial FM band. Actually, to be more precise, My commercial license authorizes me to service, repair, tune and operate land and ship stations but it does not give...
  8. CDRIVE

    DC Motor Control in ROV

    Don't forget that you need opposite turning screws or your ROV is going to rotate.
  9. CDRIVE

    Could anyone just take a look?

    Personally, I'm amazed that anyone here is helping you. This thing is illegal in most countries and definitely in the U.S. Probably in Australia too! 40 Watts can play havoc on receivers for well over a 10 mile radius.
  10. CDRIVE

    Frequency generator and timer.

    I don't see any additional information. Even if you did,.. you don't start a new thread every time you post additional information. So, what do you think about the information Steve gave you?
  11. CDRIVE

    Frequency generator and timer.

    Why do you have two threads with the same topic and why did you ignore the Moderator? Forgot the link,, https://www.electronicspoint.com/frequency-generator-and-timer-t251152.html
  12. CDRIVE

    555 timer reverse polarity circuit

    Hopefully this will be the last version of this. The LEDs were moved into the constant current legs of the supply as ElectroBrain suggested. ************* Notes ************** All Resistors are 1/4W All Disc Caps are rated >= 25VDC C2: Electrolytic...
  13. CDRIVE

    555 timer reverse polarity circuit

    C4 no longer exists. It was used in the earlier schematic that employed a 7812 voltage regulator. https://www.electronicspoint.com/attachments/5115d1344270880-555-timer-reverse-polarity-circuit-555-1minhi1minlo-.jpg This was removed when 555 power reverted back to a wallwart but not updated...
  14. CDRIVE

    What value of resistors do I need and a sanity check

    I fully expect all of you that are passing electric current through your brain, with hopes of increasing brain power, to be Gurus here in one month. OK,... two months then. :rolleyes:
  15. CDRIVE

    555 timer reverse polarity circuit

    ,29mA = 290uA or is that a typo?
  16. CDRIVE

    Help Me/ hook up a forward-stop-reverse motor cont switch on a 220volt mill machine

    Well, if you get tired of manually starting the motor you may want to test the start cap. I know I mentioned this before but I'm not sure if I actually asked this... When you turn the motor on does any sound emanate from it at all, prior to spinning it?
  17. CDRIVE

    tv power cable

    I'm guessing that the TV jack is an HP type male, like on a PC. I've never seen an HP right angle female that isn't molded. That doesn't mean they don't exist though. ;)
  18. CDRIVE

    Auton: The autonomous sailing boat

    Trans-Ocean Voyage, There is no if. :D
  19. CDRIVE

    tv power cable

    This seems like a whole lot of fuss over something that can be rectified with a good extension cord.
  20. CDRIVE

    high frequency amplifier

    What's the max VPP output of your Gen when terminated into 600Ω?
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