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  1. CDRIVE

    Beginner Question...

    Bob, thanks for catching that. I've spent quite a bit of time searching USB distribution devices but have come up empty. At this point I'm liking the solenoid approach that I dismissed as crude, earlier in this thread. It may be clunky but it would keep his switch box circuit intact. Chris
  2. CDRIVE

    Building my own bench drill

    Dave, thanks for letting me know I wasn't imagining a boogeyman that wasn't there. Miguel, welding cast iron is an exercise in futility. Though Cast Iron can be brazed. Is that photo the quill that was machined for you? I don't think you posted a photo of the broken casting. Chris
  3. CDRIVE

    Beginner Question...

    Either the ebay model or this one from Jameco http://www.jameco.com/1/1/46715-s3-12v-12vdc-4pst-relay-miniature.html?avad=55097_cb7bd6eb&source=Avantlink will fulfill the requirement of switching 4 circuits but I do have reservations. When this thread started I had a mindset that you needed to...
  4. CDRIVE

    Beginner Question...

    It may not be easy to find a 4 Pole relay with a 5V coil. I didn't find any on ebay or www.mpja.com where I can usually find items at a great price. 12V models are plentiful though. The coil voltage and current isn't going to be a big deal because you can power it from an inexpensive wallwart...
  5. CDRIVE

    Beginner Question...

    I just got an ebay hit on this USB SwitchBox. Is this your product? Chris
  6. CDRIVE

    Beginner Question...

    USB ports consists of 4 conductors. Pin1: +5V Pin2: Data- Pin3: Data+ Pin4: GND After examining your photos of the USB switch board these are my observations: (1) All 4 pins are switched including the GND pin. (2) The switch board employs a transfer bar that releases any previously pressed...
  7. CDRIVE

    Beginner Question...

    Please forgive me as I forgot something important right from the get-go... Welcome to EP! OK, your last sketch and description makes things much clearer now. It's now time for this old dog to hit the sack but I'll pick this back up over morning coffee. Ciao Chris
  8. CDRIVE

    Beginner Question...

    Are you going to be switching only a single USB device on and off as indicated in your schematic? Chris
  9. CDRIVE

    Beginner Question...

    My wife is watching a Netflix movie right now and I think my online pipeline sharing is giving her fits. Our broadband isn't that broad, so this will be my last post until her movie is over. Anyway, no.. You have to duplicate switching all the pins that the switch does. USB can't have more than...
  10. CDRIVE

    Beginner Question...

    Your schematic implies that you're only interested in switching the 5V pin. Is this correct? Chris
  11. CDRIVE

    Beginner Question...

    Not elegant but would 4 Pole micro-relays work for you? Chris
  12. CDRIVE

    Beginner Question...

    Yup, I misinterpreted your post. I did edit my post before seeing your reply though. How about a simple schematic or block diagram depicting what you want to do? Chris
  13. CDRIVE

    Beginner Question...

    I'm assuming what you're calling an existing switches to be electromechanical relays. I don't think anyone can answer your question accurately without knowing what devices you intend to switch on and off. Chris Edit: I may have totally misinterpreted your question, which is why we speak...
  14. CDRIVE

    Complete electronic virgin!

    It's good to see you starting out your electronics education designing a simple project. I thought you were going to ask something complicated! :D Chris
  15. CDRIVE

    Help selecting the correct Diode

    Commercially available (Diode) battery isolators have been available from the marine electronics industry for decades. They're manufactured to live in extremely harsh environments. Chris
  16. CDRIVE

    Building my own bench drill

    When I clicked on the Miguel's image it loaded but Malwarebytes alerted me that it blocked a malicious website. I removed the hyperlink (TradeAdExchangeDotCom) because Malwarebytes doesn't even like my mouse hovering over it! Anyone else get an antivirus alert? Chris
  17. CDRIVE

    Help needed on simple short circuit protection

    Hello Proton and welcome to EP! I'm jumping into this discussion because Proton's post shouldn't be overlooked. It's the quintessential example of KISS! It's not a new concept at all but just because it's as old as the incandescent lamp itself doesn't make it any less effective or applicable...
  18. CDRIVE

    help school project. power to timer

    Sometimes I find that an ebay page doesn't fully load, so I have to reload it. It's near the bottom of the page embedded as an image. The same info is listed under the image as HTML. Chris
  19. CDRIVE

    Transistor state control

    Uh, I think Steve is being overly optimistic or very kind when he said "required skills". When you enter the microwave world you're traveling through another dimension....... You've just entered the Twilight Zone. :D Have you Googled an off the shelf solution? Chris
  20. CDRIVE

    Serial port communication

    Hello Peter and welcome to EP! I've never worked with PHP so I Googled it and read through Wikipedia's description. It was quite an interesting read. Here's a humorous clip from the article: I didn't know that there was more than one year of 2010! o_O Chris
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