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  1. CDRIVE

    New project: 4-1000A amp

    As a ballpark figure I would calculate the resistor value to pass about 10 times the reverse leakage current found in the datasheet. Regarding an RF push pull configuration: I would consult the Radio Amateurs Handbook. Chris
  2. CDRIVE

    wireless auto release

    Building your own combat range? Chris
  3. CDRIVE

    Uln2003 Stepper motor controller help

    Hello Josh and welcome to EP. Please clarify this statement. db25 is a model topography that describes the physical design of a "D" type connector. If you're asking if you could control the steppers via a computer in lieu of a PIC then you'd be asking if serial port control would work. This...
  4. CDRIVE

    pc project - connecting all grounds to usb?

    Hi and welcome to EP. Please post your schematic. Chris
  5. CDRIVE

    New project: 4-1000A amp

    If you series stack 1N4007's you should shunt each diode with an identical and appropriate resistance value. This technique is also used with series stacked electros. Chris EDIT: Congratulations KK6FVT!
  6. CDRIVE

    Why I want my old world back!

    Actually, there's validity in that statement. ;) Chris
  7. CDRIVE

    Time delay relay or switch?

    It's doubtful that you will find anything off the shelf that'll fit that requirement but we can instruct you how to fabricate it. Chris
  8. CDRIVE

    Why I want my old world back!

    I passed a disabled car on the shoulder of the road today. There was a young girl on her knees changing a flat while her boy friend, husband (?), whatever, stood there with his hands in his pockets! Chris
  9. CDRIVE

    Charging a 26 Ah battery from 50% charge

    Ha, too funny! Should we then mark this thread as Resolved? :p Chris
  10. CDRIVE

    3W LED. Why doesn't P=VI?

    I see that the seller's location is Hong Kong. Pigeon English responses are not unusual. ;) Make sure you use Heat Sink Compound between the base of the LED and the heat sink. Failing to properly do so will render the heat sink less than fully effective. Chris
  11. CDRIVE

    Charging a 26 Ah battery from 50% charge

    That's impossible to answer without knowing the current capacity of your charger. Chris
  12. CDRIVE

    12v High Power FM Transmitter

    Simplifies things! :eek: It sounds like you're using this like a wireless PA system. Is that what this is? Large commercial buildings usually have an extensive telephone system with gobs of unused pairs. Have you explored this? I did this in a very large hospital. Chris
  13. CDRIVE

    Too much battery

    Are you saying that the cam survived the over voltage and is still functioning off the battery pack? Chris
  14. CDRIVE

    LC meter accuracy

    So, I take it, the tests surpass your expectations. Chris
  15. CDRIVE

    12v High Power FM Transmitter

    What are you using it for,.. music? Chris
  16. CDRIVE

    running 230 V/50 Hz CLOCK in US?

    Odd, I found this.. http://download.p4c.philips.com/files/h/hf3485_60/hf3485_60_dfu_cfr.pdf but there's no mention of 240V/50Hz. The .pdf only mentions 120V/60Hz. Chris
  17. CDRIVE

    running 230 V/50 Hz CLOCK in US?

    A decent 120VAC to 240VAC (yes it's not 230V) transformer might cost you more than the clock! I would also not rely on 12VDC to 120VAC converters to produce a clean or accurate 60Hz. Chris
  18. CDRIVE

    12v High Power FM Transmitter

    We already know that the 15W you're transmitting is well above the legal limit in the UK or just about anywhere else for that matter. Aiding you to further exceed power limits would put Electronics Point in legal deep water. Chris
  19. CDRIVE

    USB Input switch

    Your very welcome. Good luck. Chris
  20. CDRIVE

    USB Input switch

    Here ya go. Please read the notes on the schematic. All connectors are USB-Female panel jacks. Chris
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